criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;

    char S[110];
    char T[110];



    int main(int argc, char* argv[])
    {
        int a;scanf("%d", &a );
        scanf("%s%s", S, T);
        for (int i = 0; i < a; ++i)
        {
            printf("%c%c", S[i], T[i]);
            printf("\n" )
        };
        return 0;
    }


Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:17:26: error: expected ';' before '}' token
   17 |             printf("\n" )
      |                          ^
      |                          ;
   18 |         };
      |         ~
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;

    char S[110];
    char T[110];



    int main(int argc, char* argv[])
    {
        int a;scanf("%d", &a );
        scanf("%s%s", S, T);
        for (int i = 0; i < a; ++i)
        {
            printf("%c%c", S[i], T[i]);
            printf("\n" )
        }
        return 0;
    }


Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:17:26: error: expected ';' before '}' token
   17 |             printf("\n" )
      |                          ^
      |                          ;
   18 |         }
      |         ~
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;

    char S[110];
    char T[110];
    


    int main(int argc, char* argv[])
    {
        int a;scanf("%d\n", &a );
        scanf("%s%s\n", S, T);
        for (int i = 0; i < a; ++i)
        {
            printf("%c%c\n", S[i], T[i]);
            printf("\n", );
        }
        return 0;
    }


Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:17:26: error: expected primary-expression before ')' token
   17 |             printf("\n", );
      |                          ^
Language: C++

#include <iostream>
#include <algorithm>
#include <string>

using namespace std;

int main() {
  int length;
  string s, t;
  cin >> length >> s >> t;
  for(i = 0; i < length; i++) {
    cout >> s[i] >> t[i];
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:7: error: 'i' was not declared in this scope
   11 |   for(i = 0; i < length; i++) {
      |       ^
Language: C++

#include <algorithm>
#include <iostream>
#include<string>

int main( ){
  int n;
  std::cin >> n;
  std::string s;
  std::cin >> s;
  std::string t;
  std::cin >> t;
  std::string res;
  for(int i = 0; i < n; i ++){
      res.push_back = s.at(i);
      res.push_back = t.at(i); 
  }
  std::cout << res;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:11: error: invalid use of member function 'void std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::push_back(_CharT) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]' (did you forget the '()' ?)
   14 |       res.push_back = s.at(i);
      |       ~~~~^~~~~~~~~
a.cc:15:11: error: invalid use of member function 'void std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::push_back(_CharT) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]' (did you forget the '()' ?)
   15 |       res.push_back = t.at(i);
      |       ~~~~^~~~~~~~~
Language: C++

#include <algorithm>
#include <iostream>
#include<string>

int main( ){
  int n;
  std::in >> n;
  std::string s;
  std::in >> s;
  std::string t;
  std::in >> t;
  std::string res;
  for(int i = 0; i < n; i ++){
      res.push_back = s.at(i);
      res.push_back = t.at(i); 
  }
  std::cout << res;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:8: error: 'in' is not a member of 'std'; did you mean 'min'?
    7 |   std::in >> n;
      |        ^~
      |        min
a.cc:9:8: error: 'in' is not a member of 'std'; did you mean 'min'?
    9 |   std::in >> s;
      |        ^~
      |        min
a.cc:11:8: error: 'in' is not a member of 'std'; did you mean 'min'?
   11 |   std::in >> t;
      |        ^~
      |        min
a.cc:14:11: error: invalid use of member function 'void std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::push_back(_CharT) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]' (did you forget the '()' ?)
   14 |       res.push_back = s.at(i);
      |       ~~~~^~~~~~~~~
a.cc:15:11: error: invalid use of member function 'void std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::push_back(_CharT) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]' (did you forget the '()' ?)
   15 |       res.push_back = t.at(i);
      |       ~~~~^~~~~~~~~
Language: Java

import java.util.*;
import java.io.*;

public class Tests {
	
	public static void main(String[] args) throws IOException {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(in.readLine());
		StringTokenizer st = new StringTokenizer(in.readLine());
		String s = st.nextToken(), t = st.nextToken();
		String r = "";
		for(int i = 0; i < n; i++) {
			r += s.charAt(i);
			r += t.charAt(i);
		}
		System.out.println(r);
	}
	
}





Compiler output:
Main.java:4: error: class Tests is public, should be declared in a file named Tests.java
public class Tests {
       ^
1 error
Language: C++

N = input()
S = input()
l = S.split() # list
ans = ""

for i in range(int(N)):
    ans = ans + l[0][i] + l[1][i]

print(ans)

Compiler output:
a.cc:3:15: error: stray '#' in program
    3 | l = S.split() # list
      |               ^
a.cc:1:1: error: 'N' does not name a type
    1 | N = input()
      | ^
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
 
int main() {
  int n;
  cin>>n;
  string s t;
  cin>>s>>t;
  rep(i,n){
    cout<<s[i]<<t[i];
  }
  cout<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: expected initializer before 't'
    8 |   string s t;
      |            ^
a.cc:9:8: error: 's' was not declared in this scope
    9 |   cin>>s>>t;
      |        ^
a.cc:9:11: error: 't' was not declared in this scope
    9 |   cin>>s>>t;
      |           ^
Language: C++

#include <stdio.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <cstdlib>
#include <list>
#include <numeric>
#define rep(i,n) for(int i=0;i<n;i++)
#define all(x) (x).begin(),(x).end()
using namespace std;

int a, b, c, n;
string s;



int main()
{
	
	
  cin>>a;
  cin>>s>>t;
  rep(i,a)
    {printf("¥c¥c",s[i],t[i])}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:11: error: 't' was not declared in this scope; did you mean 'tm'?
   23 |   cin>>s>>t;
      |           ^
      |           tm
Language: C++

#include<iostream>
#include<vector>
#include<algorithm>
#include<string>
#include<set>
#include<map>
#include<queue>
#define REP(i,a) for (int i = 0;i < (a);++i)
#define FOR(i,a,b) for (int i = (a);i < (b); ++i)
#define FORR(i,a,b) for (int i = (a);i >= (b); --i)
#define ALL(obj) (obj).begin(),(obj).end()
#define SORT(list) sort(ALL((list)));
#define MOD 1000000007
using namespace std;
using ll = long long;
int main(){
    int n;
    string s,t;
    cin >> n >> s >> t;
    REP(i,n){
        cout << s[i] << t[i];
    }
    cout << endl;
    return 0;
}#include<iostream>
#include<vector>
#include<algorithm>
#include<string>
#include<set>
#include<map>
#include<queue>
#define REP(i,a) for (int i = 0;i < (a);++i)
#define FOR(i,a,b) for (int i = (a);i < (b); ++i)
#define FORR(i,a,b) for (int i = (a);i >= (b); --i)
#define ALL(obj) (obj).begin(),(obj).end()
#define SORT(list) sort(ALL((list)));
#define MOD 1000000007
using namespace std;
using ll = long long;
int main(){
    int n;
    string s,t;
    cin >> n >> s >> t;
    REP(i,n){
        cout << s[i] << t[i];
    }
    cout << endl;
    return 0;
}

Compiler output:
a.cc:25:2: error: stray '#' in program
   25 | }#include<iostream>
      |  ^
a.cc:25:3: error: 'include' does not name a type
   25 | }#include<iostream>
      |   ^~~~~~~
a.cc:40:5: error: redefinition of 'int main()'
   40 | int main(){
      |     ^~~~
a.cc:16:5: note: 'int main()' previously defined here
   16 | int main(){
      |     ^~~~
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    String s=sc.next();
    String t=sc.next();
    String a="";
    for(int i=0;i<n;i++){
      a+==s.substring(i,i+1);
      a+==t.substring(i,i+1);
    }
    System.out.println(a);
  }
}

Compiler output:
Main.java:11: error: illegal start of expression
      a+==s.substring(i,i+1);
         ^
Main.java:12: error: illegal start of expression
      a+==t.substring(i,i+1);
         ^
2 errors
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    String s=sc.next();
    String t=sc.next();
    char[] c=new char[2*n];
    for(int i=0;i<n;i++){
      c[2*i]=s.substring(i,i+1);
      c[2*i+1]=t.substring(i,i+1);
    }
    System.out.println(c.toString());
  }
}

Compiler output:
Main.java:11: error: incompatible types: String cannot be converted to char
      c[2*i]=s.substring(i,i+1);
                        ^
Main.java:12: error: incompatible types: String cannot be converted to char
      c[2*i+1]=t.substring(i,i+1);
                          ^
2 errors
Language: C++

#include <bits/stdc++.h>
#define REP(i,n) for (int i = 0; i < (n); i++)
#define RREP(i, s, n) for (int i = s; i < (n); i++)
#define ALL(a) a.begin(), a.end()
#define RALL(a) a.rbegin(), a.rend()
#define maxs(x,y) x = max(x, y)
#define mins(x,y) x = min(x, y)
using namespace std;
using ll = long long;
typedef pair<int, int> pint;
typedef pair<ll, ll> pll;
const ll MOD = 1000000007;
const ll INF = MOD * MOD;
const int inf = (1<<29);

int main() {

    string S, T;
    cin >> S, T;
    
    REP(i, N) {
        cout << S[i] << T[i];
    }
    cout << endl;

    //cout << ans << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:12: error: 'N' was not declared in this scope
   21 |     REP(i, N) {
      |            ^
a.cc:2:39: note: in definition of macro 'REP'
    2 | #define REP(i,n) for (int i = 0; i < (n); i++)
      |                                       ^
Language: C++

#include <iostream>
#include <vector>
using namespace std;

int main(){
    int n;
    char a , b;
    cin >> n >> a >> b;
    for(int i =0;i<n;i++){
        cout << a[i] << b[i];
    }
    cout << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:18: error: invalid types 'char[int]' for array subscript
   10 |         cout << a[i] << b[i];
      |                  ^
a.cc:10:26: error: invalid types 'char[int]' for array subscript
   10 |         cout << a[i] << b[i];
      |                          ^
Language: C++

#include<bits/stdc++.h>

using namespace std;


int n;
string str1 , str2;

int main(){
    cin >> n;
    cin >> str1 >> str2;
    for(int i=0;i<n;i++){
        cout << str1[i] << str2[i];
    }

    cout << "\n"
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:17: error: expected ';' before '}' token
   16 |     cout << "\n"
      |                 ^
      |                 ;
   17 | }
      | ~
Language: C++

#include <iostream>
#include <string>

int main(){
  int n;
  std::cin >> n;
  std::string s, t;
  std::cin >> s >> t;
  for(int i=0; i<n; ++i)
    std::cout << s[i] << t[i];
  std::cout << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:16: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   11 |   std::cout << endl;
      |                ^~~~
      |                std::endl
In file included from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

int main()
{
	int n;
	std::string a;
	std::string b;
	std::cin >> n >> a >> b;
	for (int i; i < n; i++) {
		std::cout << a[i];
		std::cout << b[i];
	}std::cout << std::endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:14: error: 'string' is not a member of 'std'
    4 |         std::string a;
      |              ^~~~~~
a.cc:1:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
  +++ |+#include <string>
    1 | int main()
a.cc:5:14: error: 'string' is not a member of 'std'
    5 |         std::string b;
      |              ^~~~~~
a.cc:5:14: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
a.cc:6:14: error: 'cin' is not a member of 'std'
    6 |         std::cin >> n >> a >> b;
      |              ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | int main()
a.cc:6:26: error: 'a' was not declared in this scope
    6 |         std::cin >> n >> a >> b;
      |                          ^
a.cc:6:31: error: 'b' was not declared in this scope
    6 |         std::cin >> n >> a >> b;
      |                               ^
a.cc:8:22: error: 'cout' is not a member of 'std'
    8 |                 std::cout << a[i];
      |                      ^~~~
a.cc:8:22: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:9:22: error: 'cout' is not a member of 'std'
    9 |                 std::cout << b[i];
      |                      ^~~~
a.cc:9:22: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:10:15: error: 'cout' is not a member of 'std'
   10 |         }std::cout << std::endl;
      |               ^~~~
a.cc:10:15: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:10:28: error: 'endl' is not a member of 'std'
   10 |         }std::cout << std::endl;
      |                            ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | int main()
Language: C++

#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define rep(i,n) for(int i=0;i<(n);i++)
#define reps(i,n,s) for(int i=(s);i<(n);i++)
typedef long long int ll;
using namespace std;
using Graph = vector<vector<int> >;

int main(){
cin.tie(0);
ios::sync_with_stdio(false);
int N;
string S,T;
cin>>N;
cin>>S>>T;
string ans="";

rep(i,N){
    ans+=S[i];
    ans+=T[i];
}
cout<<ans<<endl;
//system("pause");#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define rep(i, n) for (int i = 0; i < (n); i++)
#define reps(i, n, s) for (int i = (s); i < (n); i++)
typedef long long int ll;
using namespace std;
using Graph = vector<vector<int>>;

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    int N;
    string S, T;
    cin >> N;
    cin >> S >> T;
    string ans = "";

    rep(i, N)
    {
        ans += S[i];
        ans += T[i];
    }
    cout << ans << endl;
    //system("pause");
    return 0;
}
return 0;
}

Compiler output:
a.cc:27:9: warning: "rep" redefined
   27 | #define rep(i, n) for (int i = 0; i < (n); i++)
      |         ^~~
a.cc:4:9: note: this is the location of the previous definition
    4 | #define rep(i,n) for(int i=0;i<(n);i++)
      |         ^~~
a.cc:28:9: warning: "reps" redefined
   28 | #define reps(i, n, s) for (int i = (s); i < (n); i++)
      |         ^~~~
a.cc:5:9: note: this is the location of the previous definition
    5 | #define reps(i,n,s) for(int i=(s);i<(n);i++)
      |         ^~~~
a.cc: In function 'int main()':
a.cc:33:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   33 | int main()
      |         ^~
a.cc:33:9: note: remove parentheses to default-initialize a variable
   33 | int main()
      |         ^~
      |         --
a.cc:33:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:34:1: error: a function-definition is not allowed here before '{' token
   34 | {
      | ^
Language: C

#include <string.h>
#include <stdio.h>
int main()
{
	char a[i],b[i];
	int i,j;

	scanf("%s""%s",a,b);

	for(i=0;;++i)
	{
	printf("%c%c",a[i],b[i]);
	if(j == '\0')
	break;
	}
	return 0;
	}


Compiler output:
main.c: In function 'main':
main.c:5:16: error: 'i' undeclared (first use in this function)
    5 |         char a[i],b[i];
      |                ^
main.c:5:16: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  
  int n;
  cin >> n
  string s, t;
  cin >> s >> t;
  string ans;

  for (int i = 0; i < n; i++) {
  ans = ans + s.at(i) + t.at(i);
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: expected ';' before 'string'
    7 |   cin >> n
      |           ^
      |           ;
    8 |   string s, t;
      |   ~~~~~~   
a.cc:9:10: error: 's' was not declared in this scope
    9 |   cin >> s >> t;
      |          ^
a.cc:9:15: error: 't' was not declared in this scope
    9 |   cin >> s >> t;
      |               ^
Language: C++

#include<bits/std++.h>
using namespace std;
int n;
int main()
{
	cin>>n;
	string s,t;
	cin>>s>>t;
	for(int i=0;i<n;i++)
	{
		cout<<s[i]<<t[i];
	}
	return 0;
}

Compiler output:
a.cc:1:9: fatal error: bits/std++.h: No such file or directory
    1 | #include<bits/std++.h>
      |         ^~~~~~~~~~~~~~
compilation terminated.
Language: Java

import java.util.*; import java.io.*;
public class solution {
 public static void main(String[] args) throws Exception {
  Scanner file = new Scanner(System.in);
  int n = file.nextInt();
  char[] a = file.next().toCharArray();
  char[] b = file.next().toCharArray();
  char[] c = new char[n * 2];
  for (int i = 0; i < n; i++) {
   c[i * 2] = a[i];
   c[i * 2 + 1] = b[i];
  }
  System.out.println(c);
}
}

Compiler output:
Main.java:2: error: class solution is public, should be declared in a file named solution.java
public class solution {
       ^
1 error
Language: Java

import java.util.*; import java.io.*;
public class solution {
 public static void main(String[] args) throws Exception {
  Scanner file = new Scanner(System.in);
  int n = file.nextInt();
  char[] a = file.next().toCharArray();
  char[] b = file.next().toCharArray();
  char[] c = new char[n * 2];
  for (int i = 0; i < n; i++) {
   c[i * 2] = a[i];
   c[i * 2 + 1] = b[i];
  }
  System.out.println(c);
}

Compiler output:
Main.java:14: error: reached end of file while parsing
}
 ^
1 error
Language: Java

import java.util.*;
public class ABC148 {
    
    public static void main(String[] args){
        B();
    }

    public static void A(){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        System.out.println(6 - (a + b));
    }

    public static void B(){
    Scanner sc = new Scanner(System.in);
    int n = Integer.parseInt(sc.nextLine());
    String[] s = sc.nextLine().split("\\s+");
    StringBuilder ans = new StringBuilder();
    for(int i = 0; i < n; i++){
        ans.append(s[0].charAt(i));
        ans.append(s[1].charAt(i));

    }

    System.out.print(ans.toString());

    }
}


Compiler output:
Main.java:2: error: class ABC148 is public, should be declared in a file named ABC148.java
public class ABC148 {
       ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main(){
  int N;
  string str = A, B;
  cin >> N;
  cin >> A >> B;
  for(int i = 0; i < N; i++){
    cout << A.at(i) << B.at(i);
  }
}
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:6:16: error: 'A' was not declared in this scope
    6 |   string str = A, B;
      |                ^
a.cc:8:15: error: 'B' was not declared in this scope
    8 |   cin >> A >> B;
      |               ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main(){
  int N;
  char str1, str2;
  cin >> N;
  cin >> str1 >> str2;
  for(int i = 0; i < N; i++){
    cout << str1.at(i) << str2.at(i);
  }
}
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:10:18: error: request for member 'at' in 'str1', which is of non-class type 'char'
   10 |     cout << str1.at(i) << str2.at(i);
      |                  ^~
a.cc:10:32: error: request for member 'at' in 'str2', which is of non-class type 'char'
   10 |     cout << str1.at(i) << str2.at(i);
      |                                ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main(){
  int N
  char str1, str2;
  cin >> N >> str1 >> str2;
  for(i = 0; i < N; i++){
    cout << str1.at(i) << str2.at(i)
  }
}
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: expected initializer before 'char'
    6 |   char str1, str2;
      |   ^~~~
a.cc:7:10: error: 'N' was not declared in this scope
    7 |   cin >> N >> str1 >> str2;
      |          ^
a.cc:7:15: error: 'str1' was not declared in this scope
    7 |   cin >> N >> str1 >> str2;
      |               ^~~~
a.cc:7:23: error: 'str2' was not declared in this scope
    7 |   cin >> N >> str1 >> str2;
      |                       ^~~~
a.cc:8:7: error: 'i' was not declared in this scope
    8 |   for(i = 0; i < N; i++){
      |       ^
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;
typedef long long ll;

int main() {
  int N;
  cin >> N;
  string S, T;
  cin >> S >> T;

  string ans;
  rep(i,n) {
    ans += s[i];
    ans += t[i];
  }
  
  cout << ans << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: 'n' was not declared in this scope
   13 |   rep(i,n) {
      |         ^
a.cc:2:39: note: in definition of macro 'rep'
    2 | #define rep(i,n) for (int i = 0; i < (n); ++i)
      |                                       ^
a.cc:14:12: error: 's' was not declared in this scope
   14 |     ans += s[i];
      |            ^
a.cc:15:12: error: 't' was not declared in this scope
   15 |     ans += t[i];
      |            ^
Language: C++

#include<stdc++.h>
using namespace std;
int main(){
int N;
  string S,T;
  cin >> N >> S >> T;
  for(int i = 0; i < N; i++){
cout << S[i] << T[i] << endl;
  }
}

Compiler output:
a.cc:1:9: fatal error: stdc++.h: No such file or directory
    1 | #include<stdc++.h>
      |         ^~~~~~~~~~
compilation terminated.
Language: Java

import java.util.Scanner;
public class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    
    int n = scan.nextInt();
    
    String s = scan.next();
    String t = scan.next();
    
    for(int i = 0, i < n, i ++){
      System.out.print(s.charAt(i) + t.charAt(i));
    }
    System.out.println();
  }
}

Compiler output:
Main.java:11: error: ';' expected
    for(int i = 0, i < n, i ++){
                    ^
Main.java:11: error: > or ',' expected
    for(int i = 0, i < n, i ++){
                            ^
Main.java:11: error: illegal start of expression
    for(int i = 0, i < n, i ++){
                              ^
3 errors
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    getchar();
    char s[101],t[101],r[201];
    int i,j=0;
    gets(s);
    gets(t);
    for(i=0;i<2*n;i++)
    {
        r[j]=s[i];
        j++;
        r[j]=t[i];
        j++;
    }
    puts(r);


}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    9 |     gets(s);
      |     ^~~~
      |     getw
Language: C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(void){
  char str1[100],str2[100],str[300];
  int i,n;
  
  fgets(str,sizeof(str),stdin);
  n=atoi(str);
  fgets(str,sizeof(str),stdin);
  str1=strtok(str," ");
  str2=strtok(NULL," ");
  
  for(i=0;i<n;i++){
    printf("%c%c",str1[i],str2[i]);
  }
  return 0;
}
  

Compiler output:
main.c: In function 'main':
main.c:12:7: error: assignment to expression with array type
   12 |   str1=strtok(str," ");
      |       ^
main.c:13:7: error: assignment to expression with array type
   13 |   str2=strtok(NULL," ");
      |       ^
Language: C++

#include<iostream>
using namespace std;
int main()
{
  int n;
  string s,t;
  cin>>n>>s>>t;
  for(i=0;i<n;i++)
  {
    cout<<s[i]<<t[i];
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: 'i' was not declared in this scope
    8 |   for(i=0;i<n;i++)
      |       ^
Language: C++

#include <bits/stdc++.h>
using namspace std;

int main()
{	
  	string s , t;
  	cin >> s >> t;
  	for(int i = 0 ; i < t.size() ; i++)
    {
      	cout <<s[i]<<t[i];
    }
  cout << endl;
	return 0;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namspace'
    2 | using namspace std;
      |       ^~~~~~~~
a.cc: In function 'int main()':
a.cc:6:9: error: 'string' was not declared in this scope
    6 |         string s , t;
      |         ^~~~~~
a.cc:6:9: note: suggested alternatives:
In file included from /usr/include/c++/14/string:41,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:7:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |         cin >> s >> t;
      |         ^~~
      |         std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:16: error: 's' was not declared in this scope
    7 |         cin >> s >> t;
      |                ^
a.cc:7:21: error: 't' was not declared in this scope; did you mean 'tm'?
    7 |         cin >> s >> t;
      |                     ^
      |                     tm
a.cc:10:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   10 |         cout <<s[i]<<t[i];
      |         ^~~~
      |         std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:12:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   12 |   cout << endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:12:11: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   12 |   cout << endl;
      |           ^~~~
      |           std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <iostream>

int main(){
	using namespace std;
	string str,sstr;
	int i = 0,leng = 0;
	cin >> leng >> str >> sstr;
	
	for (i = 0; i < leng;i++) {
		astr[i*2] = str[i] ;
		astr[i * 2 + 1] = sstr[i];
	}

	cout << astr << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:17: error: 'astr' was not declared in this scope; did you mean 'sstr'?
   10 |                 astr[i*2] = str[i] ;
      |                 ^~~~
      |                 sstr
a.cc:14:17: error: 'astr' was not declared in this scope; did you mean 'sstr'?
   14 |         cout << astr << endl;
      |                 ^~~~
      |                 sstr
Language: C++

#include <iostream>

int main(){
	using namespace std;
	string str,sstr,astr;
	int i = 0,leng = 0;
	cin >> leng >> str >> sstr; 
	
	for (i = 0; i < leng;i++) {
		astr = str[i] & sstr[i];
	}

	cout << tim << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:17: error: 'tim' was not declared in this scope; did you mean 'tm'?
   13 |         cout << tim << endl;
      |                 ^~~
      |                 tm
Language: C++

#include<iostream>
using namespace std;
string S,T,ans;
int N;
int k;
int main(){
  cin>>N;
  cin>>S;
  cin>>T;
  k=0;
  for(int n=0;n==N;n++){
    ans[k]=S[n];
    k++;
    ans[k]=T[n];
    K++;
  }
  cout<<ans<<endl;
    
  }
  


Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: 'K' was not declared in this scope
   15 |     K++;
      |     ^
Language: C++

#include<iostream>
using namespace std;
string S,T,ans;
int N;
int k;
int main(){
  cin>>N;
  cin>>S;
  cin>>T;
  k=0;
  for(int n=0;n==N; n++;){
    ans[k]=S[n];
    k++;
    ans[k]=T[n];
    K++;
  }
  cout<<ans<<endl;
    
  }
  


Compiler output:
a.cc: In function 'int main()':
a.cc:11:24: error: expected ')' before ';' token
   11 |   for(int n=0;n==N; n++;){
      |      ~                 ^
      |                        )
a.cc:11:25: error: expected primary-expression before ')' token
   11 |   for(int n=0;n==N; n++;){
      |                         ^
Language: C++

#include<iostream>
using namespace std;
string S,T,ans;
int N;
int k;
int main(){
  cin>>N;
  cin>>S;
  cin>>T;
  k=0;
  for(int n=0;n==N n++;){
    ans[k]=S[n];
    k++;
    ans[k]=T[n];
    K++;
  }
  cout<<ans<<endl;
    
  }
  


Compiler output:
a.cc: In function 'int main()':
a.cc:11:19: error: expected ';' before 'n'
   11 |   for(int n=0;n==N n++;){
      |                   ^~
      |                   ;
a.cc:11:23: error: expected ')' before ';' token
   11 |   for(int n=0;n==N n++;){
      |      ~                ^
      |                       )
a.cc:11:24: error: expected primary-expression before ')' token
   11 |   for(int n=0;n==N n++;){
      |                        ^
Language: C

#include<stdop.h>

int main(){
  int N;
  char S[101],T[101];
  scanf("%d",&N);
  scanf("%s%s",S,T);
  for(int i = 0; i < N; i++){
  	printf("%c%c",S[i],T[i]);
  }
  printf("\n");
	return 0;
}

Compiler output:
main.c:1:9: fatal error: stdop.h: No such file or directory
    1 | #include<stdop.h>
      |         ^~~~~~~~~
compilation terminated.
Language: C

#include<stdio.h>
#include<string.h>
int main()
{
  int n;
  scanf("%d",&n);
  char a[n], b[n];
  scanf("%s", a);
  scanf("%s"; b);
  strcat(a,b);
  printf("%s, a);
  return 0;
         }

Compiler output:
main.c: In function 'main':
main.c:9:13: error: expected ')' before ';' token
    9 |   scanf("%s"; b);
      |        ~    ^
      |             )
main.c:11:10: warning: missing terminating " character
   11 |   printf("%s, a);
      |          ^
main.c:11:10: error: missing terminating " character
   11 |   printf("%s, a);
      |          ^~~~~~~~
main.c:12:3: error: expected expression before 'return'
   12 |   return 0;
      |   ^~~~~~
main.c:12:12: error: expected ';' before '}' token
   12 |   return 0;
      |            ^
      |            ;
   13 |          }
      |          ~
Language: C

#include,stdio.h>
int main()
{
  int n;
  scanf("%d",&n);
  char a[n],b[n];
  gets(a);
  gets(b);
  strcat(a,b);
  puts(a);
  return 0;
}

Compiler output:
main.c:1:9: error: #include expects "FILENAME" or <FILENAME>
    1 | #include,stdio.h>
      |         ^
main.c: In function 'main':
main.c:5:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    5 |   scanf("%d",&n);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | #include,stdio.h>
main.c:5:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    5 |   scanf("%d",&n);
      |   ^~~~~
main.c:5:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:7:3: error: implicit declaration of function 'gets' [-Wimplicit-function-declaration]
    7 |   gets(a);
      |   ^~~~
main.c:9:3: error: implicit declaration of function 'strcat' [-Wimplicit-function-declaration]
    9 |   strcat(a,b);
      |   ^~~~~~
main.c:1:1: note: include '<string.h>' or provide a declaration of 'strcat'
  +++ |+#include <string.h>
    1 | #include,stdio.h>
main.c:9:3: warning: incompatible implicit declaration of built-in function 'strcat' [-Wbuiltin-declaration-mismatch]
    9 |   strcat(a,b);
      |   ^~~~~~
main.c:9:3: note: include '<string.h>' or provide a declaration of 'strcat'
main.c:10:3: error: implicit declaration of function 'puts' [-Wimplicit-function-declaration]
   10 |   puts(a);
      |   ^~~~
main.c:10:3: note: include '<stdio.h>' or provide a declaration of 'puts'
Language: C++

#include <iostream>
using namespace std;

int main(){
	ios_base :: sync_with_stdio(false);
	cin.tie(NULL);
  	int n;
  	cin >>n;
  	strint s,t;
  	cin >>s>>t;
  	for (int i=0; i<n; i++){
    	cout <<s[i]<<t[i];
    }
  	cout <<"\n";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'strint' was not declared in this scope; did you mean 'stdin'?
    9 |         strint s,t;
      |         ^~~~~~
      |         stdin
a.cc:10:15: error: 's' was not declared in this scope
   10 |         cin >>s>>t;
      |               ^
a.cc:10:18: error: 't' was not declared in this scope
   10 |         cin >>s>>t;
      |                  ^
Language: C++

#include<iostream>
using namespace std;
int main()
{
  string s,t;
  string c="";
  int n,i;
  cin>>n;
  cin>>s>>t;
  for(i=0;i<n;i++)
  {
   c=a[i];
   c+=b[i]; 
  }
  return 0;
}  

Compiler output:
a.cc: In function 'int main()':
a.cc:12:6: error: 'a' was not declared in this scope
   12 |    c=a[i];
      |      ^
a.cc:13:7: error: 'b' was not declared in this scope
   13 |    c+=b[i];
      |       ^
Language: C++

#include<bits/stdc++.h>
using namespace std;

int main(){
 int n;
  string s,t;
  cin>>n;
  cin>>s>>t;
  vector<string> v(2n);
  for(int i=0;i<2n;i+=2)
  v[i]=s[i];
  for(int i=1;i<2n;i+=2)
    v[i]=t[i];
  for(int i=0;i<2n;i++)
  {
  cout<<v[i];
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:20: error: unable to find numeric literal operator 'operator""n'
    9 |   vector<string> v(2n);
      |                    ^~
a.cc:10:17: error: unable to find numeric literal operator 'operator""n'
   10 |   for(int i=0;i<2n;i+=2)
      |                 ^~
a.cc:12:17: error: unable to find numeric literal operator 'operator""n'
   12 |   for(int i=1;i<2n;i+=2)
      |                 ^~
a.cc:14:17: error: unable to find numeric literal operator 'operator""n'
   14 |   for(int i=0;i<2n;i++)
      |                 ^~
Language: C++

#include<bits/stdc++.h>
using namespace std;

int main(){
  int n;
 string s,t;
  cin>>n;
  cin>>s>>t;
  vector<string> v(2n);
  for(int i=0;i<2n;i=i+2)
  {
   v[i]=s[i];
  }
  for(int i=1;i<2n;i=i+2)
  {
   v[i]=t[i];
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:20: error: unable to find numeric literal operator 'operator""n'
    9 |   vector<string> v(2n);
      |                    ^~
a.cc:10:17: error: unable to find numeric literal operator 'operator""n'
   10 |   for(int i=0;i<2n;i=i+2)
      |                 ^~
a.cc:14:17: error: unable to find numeric literal operator 'operator""n'
   14 |   for(int i=1;i<2n;i=i+2)
      |                 ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {

	int A;
  string a,b;
  cin>>A>>a>>b;
  for(int i =0;i<A;i++){
    cout<<a.at(i)<<b.at(i);}
  cout<<endl;}

}


Compiler output:
a.cc:13:1: error: expected declaration before '}' token
   13 | }
      | ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int n,i;
string s,t;
int main()
{
  cin>>n>>s>>t;
  for(i=0;i<n;i++)
  {
    cout<<s[i]<<t[i];
  }
  cut<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:3: error: 'cut' was not declared in this scope
   12 |   cut<<endl;
      |   ^~~
Language: C++

#include<bits/stdc++>
using namespace std;

int n;
string s,t,ans;
int main() {
  cin >> n;
  cin >> s >> t;
  for(i=0;i<2*n;++i)
  	if(i%2==0)
      ans[i]=s/2;
  	else
      ans[i]=(s+1)/2;
  cout << ans;
}

Compiler output:
a.cc:1:9: fatal error: bits/stdc++: No such file or directory
    1 | #include<bits/stdc++>
      |         ^~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<iostream>
#include<string>

int mian(){
    int n;
    std::cin >> n;
    std::string s, t;

    std::cin >> s >> t;

    for(int i = 0; i < n; i++){
        std::cout << s.at(i) << t.at(i);
    }
    std::cout << std::endl;

    return 0;
}


Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: Java

import java.uitl.*:

public class Main
{
  public static void main(String args[])
  {
    Scanner std = new Scanner(System.in);
    int n = std.nextInt();
    String s = std.next();
    String t = std.next();
    String f = null;
    
    for(int i = 0; i < n; i++)
    {
      f = f + s.substring(i, i + 1);
      f = f + t.substring(i, i + 1);
    }
  }
}

Compiler output:
Main.java:1: error: ';' expected
import java.uitl.*:
                  ^
1 error
Language: C++

#include "bits/stdc++.h"
#include <ext/pb_ds/assoc_container.hpp> 
#include <ext/pb_ds/tree_policy.hpp> 
using namespace std;
using namespace __gnu_pbds;
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define ll long long int
#define int ll
//#define slld(t) scanf("%lld",&t)
// #define sd(t) scanf("%d",&t)
// #define pd(t) printf("%d\n",t)
//#define plld(t) printf("%lld\n",t)
#define vec vector < int >
#define vecp vector < pair < int , int > >
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define debug(x)   cerr<<#x<<": "<<x<<endl
#define pii pair < int , int >
#define pll pair < ll , ll > 
#define pdd pair<double , double>
#define debug(x)   cerr<<#x<<": "<<x<<endl
#define mod  1000000007
#define N    200005
#define mod1 1000000007
#define mod2 998244353
#define bitcnt __builtin_popcountll
#define PI acos(-1)
#define s3   1.73205080757          // square root 3
const  int inf = (int)1e18+10 ;
const int MAX= 100;

 
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
ordered_set S;

int powmod(int x , int y){
	int res = 1;
	while(y > 0){
		if(y%2==1)
			res = (res*x)%mod;
		x = (x*x)%mod;
		y/=2;
	}
	return res;
}
int mul(int x , int y){
	return (x*y)%mod;
}

signed main(){
  fast;
 
  string a , b;
  int n , cin >> n;

  cin >> a >> b;
 for(int i = 0 ; i < n ; i++)
 	cout << a[i] << b[i];
 

 }

Compiler output:
a.cc: In function 'int main()':
a.cc:56:15: error: expected initializer before '>>' token
   56 |   int n , cin >> n;
      |               ^~
Language: Java

import java.util.*_;
public class mergeString { 
    public static String merge(String s1, String s2) 
    { 
        StringBuilder result = new StringBuilder(); 
        for (int i = 0; i < s1.length() || i < s2.length(); i++) { 
            if (i < s1.length()) 
                result.append(s1.charAt(i)); 
            if (i < s2.length()) 
                result.append(s2.charAt(i)); 
        } 
  
        return result.toString(); 
    } 
    public static void main(String[] args) 
    {
      Scanner sc = new Scanner(System.in);
      int length = sc.nextInt();
      String s = sc.next();
      String t = sc.next();
      System.out.println(merge(s, t)); 
    } 
} 

Compiler output:
Main.java:1: error: ';' expected
import java.util.*_;
                  ^
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define pf push_front
#define mod 1000000007
#define endl '\n'
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);

int main()
{
   ll n;
   cin>>n;
   string s1,s2;
   for(i=0;i<n;i++)
   {
       cout<<s1[i]<<s2[i];
   }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:8: error: 'i' was not declared in this scope
   15 |    for(i=0;i<n;i++)
      |        ^
Language: C

#include<stdio.h>
int man(void)
{
	int n;
	scanf("%d", &n);

	char s[100], t[100];

	scanf("%s %s", &s, &t);
	int i;
	for (i = 0; i < n; i++)
		printf("%c%c", s, t);
	return 0;
}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C

int main() {
  int n;
  scanf("%d", &n);
  
  char[n] s, t;
  scanf("%s %s", &s, &t);
  
  for (int i = 0; i < n; i++) {
    printf("%c%c", s[i], t[i]);
  }
  printf("\n");
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:3:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    3 |   scanf("%d", &n);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | int main() {
main.c:3:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    3 |   scanf("%d", &n);
      |   ^~~~~
main.c:3:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:5:7: error: expected identifier or '(' before '[' token
    5 |   char[n] s, t;
      |       ^
main.c:6:19: error: 's' undeclared (first use in this function)
    6 |   scanf("%s %s", &s, &t);
      |                   ^
main.c:6:19: note: each undeclared identifier is reported only once for each function it appears in
main.c:6:23: error: 't' undeclared (first use in this function)
    6 |   scanf("%s %s", &s, &t);
      |                       ^
main.c:9:5: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    9 |     printf("%c%c", s[i], t[i]);
      |     ^~~~~~
main.c:9:5: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:9:5: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:9:5: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:11:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   11 |   printf("\n");
      |   ^~~~~~
main.c:11:3: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C++

#include<bits/stdc++.h>
using namespace std;
char s[110];
char t[110];
int main()
{
	int a;
	cin>>a;
	scanf("%s%s",s,t);
	for(int i=0;i<a;i++)
	{
		print("%c%c",s[i],t[i]);
		cout<<endl;
	}
 } 

Compiler output:
a.cc: In function 'int main()':
a.cc:12:17: error: 'print' was not declared in this scope; did you mean 'rint'?
   12 |                 print("%c%c",s[i],t[i]);
      |                 ^~~~~
      |                 rint
Language: C

#include<stdio.h>
int main(){
  int n,i;
  scanf("%d",&n);
  char s[n],t[n];
  scanf("%s%s",s,t);
  for(i=0,i<n,i++)
    {
    printf("%c%c",s[i],t[i]);
    }
  return 0;
 }
  

Compiler output:
main.c: In function 'main':
main.c:7:18: error: expected ';' before ')' token
    7 |   for(i=0,i<n,i++)
      |                  ^
      |                  ;
main.c:7:18: error: expected expression before ')' token
Language: C++

#include <iostream>
using namespace std;
int main(){
  int scale;
  string str1;
  string str2;
  cin >> scale;
  cin >> str1 >> str2;
  for(i=0;i<scale;i++){
    iout<<str1[i]<<str2[i];
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: 'i' was not declared in this scope
    9 |   for(i=0;i<scale;i++){
      |       ^
a.cc:10:5: error: 'iout' was not declared in this scope
   10 |     iout<<str1[i]<<str2[i];
      |     ^~~~
Language: C++

#include<bits/stdc++.h>
int main(){
  int n;cin>>n;
  string s,t;
cin>>s;cin>>t;
  for(int i=0;i<n;i++)
    cout<<s[i]<<t[i];  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    3 |   int n;cin>>n;
      |         ^~~
      |         std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:4:3: error: 'string' was not declared in this scope
    4 |   string s,t;
      |   ^~~~~~
a.cc:4:3: note: suggested alternatives:
In file included from /usr/include/c++/14/string:41,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/bits/stringfwd.h:77:33: note:   'std::string'
   77 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
/usr/include/c++/14/string:76:11: note:   'std::pmr::string'
   76 |     using string    = basic_string<char>;
      |           ^~~~~~
a.cc:5:6: error: 's' was not declared in this scope
    5 | cin>>s;cin>>t;
      |      ^
a.cc:5:13: error: 't' was not declared in this scope
    5 | cin>>s;cin>>t;
      |             ^
a.cc:7:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |     cout<<s[i]<<t[i];
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: Java

import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
int N =sc.nextInt();
String S = sc.next();
String T = sc.next();
char[] s = S.toCharArray();
char[] t = T.toCharArray();
String a = "";
for(int i=0,i<N;i++){
a += "" +s[i] + "" + t[i] + "";
}
System.out.println(a);
  }
}

Compiler output:
Main.java:12: error: ';' expected
for(int i=0,i<N;i++){
             ^
Main.java:12: error: > or ',' expected
for(int i=0,i<N;i++){
               ^
2 errors
Language: C

#include <stdio.h>

int main(void) {
  int N, i;
  char List[256];
  char S[128];
  char T[128];
  
  scnaf("%d", &N);
  scanf("%s %s", S, T);
  
  printf("%s\n", S);
  printf("%s", T);
}

Compiler output:
main.c: In function 'main':
main.c:9:3: error: implicit declaration of function 'scnaf'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    9 |   scnaf("%d", &N);
      |   ^~~~~
      |   scanf
Language: C++

#include<bits/stdc++.h>
using namespace std;
int a;
int main(){
  cin>>a;
  string b,c,d;
  cin>>b>>c;
  for(int i=0;i<a;i++)d+=b[i];d+=c[i];
  cout<<d<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:36: error: 'i' was not declared in this scope
    8 |   for(int i=0;i<a;i++)d+=b[i];d+=c[i];
      |                                    ^
Language: C

int main(){
  int s, i;
  char a[101], b[101];
  scanf("%d%s%s", &s, a, b);
  for(i=0; i<n; i++){
    putchar(a[i]);
    putchar(b[i]);
  }
  putchar(10);
}


Compiler output:
main.c: In function 'main':
main.c:4:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    4 |   scanf("%d%s%s", &s, a, b);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | int main(){
main.c:4:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    4 |   scanf("%d%s%s", &s, a, b);
      |   ^~~~~
main.c:4:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:5:14: error: 'n' undeclared (first use in this function)
    5 |   for(i=0; i<n; i++){
      |              ^
main.c:5:14: note: each undeclared identifier is reported only once for each function it appears in
main.c:6:5: error: implicit declaration of function 'putchar' [-Wimplicit-function-declaration]
    6 |     putchar(a[i]);
      |     ^~~~~~~
main.c:6:5: note: include '<stdio.h>' or provide a declaration of 'putchar'
Language: C++

#include<stdio.h>
#include<stdlib.h>
int main() {
	int a, b;
	scanf_s("%d %d", &a, &b);
	printf("%d", 6 - a - b);
	system("pause");
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
    5 |         scanf_s("%d %d", &a, &b);
      |         ^~~~~~~
      |         scanf