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

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

int main() {
	string a, b;
	cin >> a >> b;
	bool mutch;
	if(a.size() == b.size()){
		mutch = true;
	}
	else{
		mutch = false;
	}
	for(int i = 0;i < a.size;i++){
		cout << a.at(i);
		if(mutch = true || i != a.size()-1)
		cout << b.at(i);
	}
	cout << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:29: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   14 |         for(int i = 0;i < a.size;i++){
      |                           ~~^~~~
      |                                 ()
Language: C++

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

int main() {
	string a, b;
	cin >> a >> b;
	bool mutch;
	if(a.size() == b.size()){
		mutch = true;
	}
	else{
		mutch = false;
	}
	for(int i = 0;i < a.size){
		cout << a.at(i);
		if(mutch = true || i != a.size()-1)
		cout << b.at(i);
	}
	cout << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:29: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   14 |         for(int i = 0;i < a.size){
      |                           ~~^~~~
      |                                 ()
a.cc:14:33: error: expected ';' before ')' token
   14 |         for(int i = 0;i < a.size){
      |                                 ^
      |                                 ;
Language: C++

#include <iostream>
using namespace std;
int main(void){
  str a[50];
  str b[50];
  int l = lenght(str)
  for (int i = l; i <= l;i++) {
    cout << a[i] << b[i];
  }
  cout << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:3: error: 'str' was not declared in this scope; did you mean 'std'?
    4 |   str a[50];
      |   ^~~
      |   std
a.cc:5:6: error: expected ';' before 'b'
    5 |   str b[50];
      |      ^~
      |      ;
a.cc:6:11: error: 'lenght' was not declared in this scope
    6 |   int l = lenght(str)
      |           ^~~~~~
a.cc:7:19: error: 'i' was not declared in this scope
    7 |   for (int i = l; i <= l;i++) {
      |                   ^
Language: C++

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

int main(){
char a[50],b[50],e[100];
int c = 0,d = 0,f = 0;
  cin >> a >> b;
  c = strlen(a);
  d = strlen(b);

  for(int S = 0;S < c;S += 0){
  e[S] += a[f];
  e[S+1] += b[f];
    f++;
    S += 2;
  }
  if(c != d){
  e[S] += a[f];
  }
  for(int S = 0;S < strlen(e);S++){
  cout << e[S] << endl;
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:5: error: 'S' was not declared in this scope
   18 |   e[S] += a[f];
      |     ^
Language: C++

#include <iostream>
#include <algorithm>
#include <cmath>
#include <limits>
#include <vector>
#include<cstdio>
#include<bits/stdc++.h>
using namespace std;
using ll =long long;

int main (void) {
  string O,E;
  string ans;
  cin >> O;
  cin >> E;
  for (int i;i<O.size();i++){
    ans += O[i];
    if (E[i]='') {
      cout << ans;
      return 0;
    }
    ans += E[i];
  }
  cout << ans;
}

Compiler output:
a.cc:18:14: error: empty character constant
   18 |     if (E[i]='') {
      |              ^~
Language: C++

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


Compiler output:
a.cc: In function 'int main()':
a.cc:10:14: error: 'O' was not declared in this scope
   10 |         if(i<O.size())cout<<c[i];
      |              ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
string a,b;
int sa,sb;
int main()
{
    cin>>a>>b;
    sa=a.length();
    sb=b.length();
    if(sa==sb)
    {
    	for(i=1;i<=sa;i++)
    	cout<<a[i]<<b[i];
    }
    else
    {
    	for(i=1;i<=sb;i++)
    	cout<<a[i]<<b[i];
    	cout<<a[sa];
    }
    cout<<endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:13: error: 'i' was not declared in this scope
   12 |         for(i=1;i<=sa;i++)
      |             ^
a.cc:17:13: error: 'i' was not declared in this scope
   17 |         for(i=1;i<=sb;i++)
      |             ^
Language: C++

#include<iostream>
#include<cstdio>
using namespace std;
char a[60],b[60];
int lena,lenb,lenn,lenx;
int main()
{
	cin>>a>>b;
	lena=strlen(a);
	lenb=strlen(b);
	lenn=min(lena,lenb);
	lenx=max(lena,lenb);
	for(int i=0;i<=lenn-1;i++)
	  cout<<a[i]<<b[i];
	if(lena>lenb)
	  for(int i=lenn;i<=lenx-1;i++)
		cout<<a[i];
	else for(int i=lenn;i<=lenx-1;i++)
			cout<<b[i];
	cout<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: 'strlen' was not declared in this scope
    9 |         lena=strlen(a);
      |              ^~~~~~
a.cc:3:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include<cstdio>
  +++ |+#include <cstring>
    3 | using namespace std;
Language: C++

#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <algorithm>
#include <cmath>
#include <cstring>
using namespace std;
string a,b;
int main()
{
    int l;
    cin>>a>>b;
    l=strlen(a);
    for(int i=0;i<l;i++)
    cout<<a[i]<<b[i];
    cout<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:14: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'const char*'
   13 |     l=strlen(a);
      |              ^
      |              |
      |              std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/14/cstring:43,
                 from a.cc:6:
/usr/include/string.h:407:35: note:   initializing argument 1 of 'size_t strlen(const char*)'
  407 | extern size_t strlen (const char *__s)
      |                       ~~~~~~~~~~~~^~~
Language: Java

import java.util.*;
public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		String O = sc.next();
		String E = sc.next();
		for(int i = 0; i < O.length() - 1; i++) {
				char o = O.charAt(i);
				char e = E.charAt(i);
				System.out.print(o);
				System.out.print(e);
		}
		System.out.print(O.charAt(O.length() -1));
		if(E.length() == O.length()) System.out.println(E.charAt(E.length() - 1);
	}
		
}
	


Compiler output:
Main.java:16: error: ')' or ',' expected
		if(E.length() == O.length()) System.out.println(E.charAt(E.length() - 1);
		                                                                        ^
1 error
Language: C++

#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int main()
{
string o,e;
cin>>o>>e;
for(int i=0;i<o.length();i++)
cout<<o[i]<<b[i];
system ("pause");
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: error: 'b' was not declared in this scope
   10 | cout<<o[i]<<b[i];
      |             ^
Language: C++

#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
#define INF (1<<30)
#define INFLL (1ll<<60)
typedef pair<ll, int> P;
#define MOD (1000000007ll)
#define l_ength size

ll sq(ll x){
	return x*x;
}

void mul_mod(ll& a, ll b){
	a *= b;
	a %= MOD;
}

bool isvowel(char c){
	int i;
	string v="aeiou";
	for(i = (v.size()-1); i>=0; --i){
		if(c == v[i]){
			return true;
		}
	}
	return false;
}

ll manhattan(ll x1, ll y1, ll x2, ll y2){
	return ((ll)(abs(x1-x2)+abs(y1-y2)));
}

ll digit(ll x){
	ll ans = 0ll;
	if(!x){
		return 0ll;
	}
	while(x>0){
		ans++;
		x /= 10;
	}
	return ans;
}

ll f(ll a, ll b){
	return max(digit(a),digit(b));
}

int main(void){
	int n,i;
	string o,e;
	cin >> o;
	cin >> e;
	n = e.l_ength();
	for(i=0; i<n; i++){
		cout << o[i] << e[i];
	}
	if(o.length > n){
		cout << o[n];
	}
	cout << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:59:14: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   59 |         if(o.length > n){
      |            ~~^~~~~~
      |                    ()
Language: C++


#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <stack>
#include <queue>
#include <functional>
#include <math.h>
#include <stdlib.h>
#include <map>
#include <deque>
#include <sys/timeb.h>
#include <fstream>

using namespace std;

#define repr(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define rep(i,n) repr(i,0,n)
#define reprrev(i,a,b) for(int i=(int)(b)-1;i>=(int)(a);i--)
#define reprev(i,n) reprrev(i,0,n)
#define repi(itr,ds) for(auto itr=ds.begin();itr!=ds.end();itr++)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
#define mp make_pair
#define mt make_tuple
#define INF 1050000000
#define INFL 1100000000000000000LL
#define EPS (1e-10)
#define MOD 1000000007
#define PI 3.1415926536
#define RMAX 4294967295

typedef long long ll;
typedef pair<int, int> Pi;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<bool> vb;
typedef vector<char> vc;
typedef vector<string> vs;
typedef vector<double> vd;
typedef vector<Pi> vPi;
typedef vector<vector<int> > vvi;
typedef vector<vector<bool> > vvb;
typedef vector<vector<ll> > vvll;
typedef vector<vector<char> > vvc;
typedef vector<vector<string> > vvs;
typedef vector<vector<double> > vvd;
typedef vector<vector<Pi> > vvPi;
typedef priority_queue<int, vector<int>, greater<int> > pqli;
typedef priority_queue<ll, vector<ll>, greater<ll> > pqlll;
typedef priority_queue<Pi, vector<Pi>, greater<Pi> > pqlP;
struct Edge {
	int from, to, cost;
	bool operator<(Edge e) {
		return cost < e.cost;
	}
};
typedef vector<Edge> Edges;
typedef vector<Edges> Graph;
template <class T>
using vec = vector<T>;
template<class T>
using pql = priority_queue<T, vector<T>, greater<T>>;
string debug_show(Pi a) {
	return "(" + to_string(a.first) + "," + to_string(a.second) + ")";
}

template<class T>
struct augEdge {
	T from, to;
	int cost;
	bool operator<(augEdge e) { return cost < e.cost; }
	bool operator>(augEdge e) { return cost > e.cost; }
};
template<class T>
using augGraph = vector<augEdge<T>>;



int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);

	string s, t;
	cin >> s >> t;
	if (s.size() == t.size()) {
		rep(i, s.size()) {
			cout << s[i];
			cout << t[i];
		}
		cout << endl;
	}
	else {
		cout << s[0];
		rep(i, s.size() - 1) 
			cout << t[i];
			cout << s[i + 1];
		}
		cout << endl;
	}

	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:98:35: error: 'i' was not declared in this scope
   98 |                         cout << s[i + 1];
      |                                   ^
a.cc: At global scope:
a.cc:103:9: error: expected unqualified-id before 'return'
  103 |         return 0;
      |         ^~~~~~
a.cc:104:1: error: expected declaration before '}' token
  104 | }
      | ^
Language: C

#include<stdio.h>
#include<string.h>
int main()
{
    char o[50]= {'\0'},f[50]= {'\0'};
    int i,a=0,b=0,u,p;
    while(~scanf("%s%s",o,f))
    {
        getchar();
        u=strlen(o);
        p=strlen(f);
        if(u==p||u-p==1)
        {
            for(i=0; i<50; i++)
            {
                printf("%c%c",o[i],f[i]);
            }
            printf("\n");
        }
        for(i=0; i<50; i++)
            {
                o[i]='\0';
                f[i]='\0';
            }a
    }
}


Compiler output:
main.c: In function 'main':
main.c:24:15: error: expected ';' before '}' token
   24 |             }a
      |               ^
      |               ;
   25 |     }
      |     ~
Language: C

#include<stdio.h>
#include<string.h>
int main()
{
     int i;
     char c;
     char str1[20],str2[20],str3[40];
      gets(str1);
      gets(str2);
      for(i=0;(c=str1[i]!='\0');i++)
       {
                strcpy(str3[2*i],str1[i]);
                strcpy(str3[2*i+1],str2[i]);
       }
       str3[2i]='\0';
       for(i=0;(c=str3[i])!='\0';i++)
              printf("%s",str3[i]);
       return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:7: error: implicit declaration of function 'gets'; did you mean 'fgets'? [-Wimplicit-function-declaration]
    8 |       gets(str1);
      |       ^~~~
      |       fgets
main.c:12:28: error: passing argument 1 of 'strcpy' makes pointer from integer without a cast [-Wint-conversion]
   12 |                 strcpy(str3[2*i],str1[i]);
      |                        ~~~~^~~~~
      |                            |
      |                            char
In file included from main.c:2:
/usr/include/string.h:141:39: note: expected 'char * restrict' but argument is of type 'char'
  141 | extern char *strcpy (char *__restrict __dest, const char *__restrict __src)
      |                      ~~~~~~~~~~~~~~~~~^~~~~~
main.c:12:38: error: passing argument 2 of 'strcpy' makes pointer from integer without a cast [-Wint-conversion]
   12 |                 strcpy(str3[2*i],str1[i]);
      |                                  ~~~~^~~
      |                                      |
      |                                      char
/usr/include/string.h:141:70: note: expected 'const char * restrict' but argument is of type 'char'
  141 | extern char *strcpy (char *__restrict __dest, const char *__restrict __src)
      |                                               ~~~~~~~~~~~~~~~~~~~~~~~^~~~~
main.c:13:28: error: passing argument 1 of 'strcpy' makes pointer from integer without a cast [-Wint-conversion]
   13 |                 strcpy(str3[2*i+1],str2[i]);
      |                        ~~~~^~~~~~~
      |                            |
      |                            char
/usr/include/string.h:141:39: note: expected 'char * restrict' but argument is of type 'char'
  141 | extern char *strcpy (char *__restrict __dest, const char *__restrict __src)
      |                      ~~~~~~~~~~~~~~~~~^~~~~~
main.c:13:40: error: passing argument 2 of 'strcpy' makes pointer from integer without a cast [-Wint-conversion]
   13 |                 strcpy(str3[2*i+1],str2[i]);
      |                                    ~~~~^~~
      |                                        |
      |                                        char
/usr/include/string.h:141:70: note: expected 'const char * restrict' but argument is of type 'char'
  141 | extern char *strcpy (char *__restrict __dest, const char *__restrict __src)
      |                                               ~~~~~~~~~~~~~~~~~~~~~~~^~~~~
main.c:15:12: error: array subscript is not an integer
   15 |        str3[2i]='\0';
      |            ^
Language: C

#include<stdio.h>
#include<string.h>
int main()
{
    char o[50]= {'\0'},f[50]= {'\0'};
    int i,a=0,b=0,u,i;
    while(~scanf("%s%s",o,f))
    {
        getchar();
        u=strlen(o);i=strlen(f);
        if(u==i||u-i==1)
        {
            for(i=0; i<50; i++)
            {
                printf("%c",o[i]);
                printf("%c",f[i]);
                if(o[i]=='\0'||f[i]=='\0')
                {
                    printf("\n");
                    break;
                }
            }
            for(i=0; i<50; i++)
            {
                o[i]='\0';
                f[i]='\0';
            }
        }
    }
}


Compiler output:
main.c: In function 'main':
main.c:6:21: error: redeclaration of 'i' with no linkage
    6 |     int i,a=0,b=0,u,i;
      |                     ^
main.c:6:9: note: previous declaration of 'i' with type 'int'
    6 |     int i,a=0,b=0,u,i;
      |         ^
Language: C++

#include<stdio.h>
int main()
{
    char O[510], E[500], a[1010], c;
    int i, j;
    scanf("%s%s", O, E);
    j = 0;
    int lo=strlen(O);
    int le=strlen(E);
    for(i = 0; i<lo; i++)
    {
        a[j] = O[i];
        j += 2;
    }
    j = 1;
    for(i = 0; i<le; i++)
    {
        a[j] = E[i];
        j += 2;
    }
    a[j] = '\0';
    printf("%s", a);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: 'strlen' was not declared in this scope
    8 |     int lo=strlen(O);
      |            ^~~~~~
a.cc:2:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    1 | #include<stdio.h>
  +++ |+#include <cstring>
    2 | int main()
Language: C

#include<stdio.h>
#include<string.h>
int main()
{
	int i,x,y,len,len1,len2;
	char a[51],b[51];
	while(scanf("%s",a)!=EOF)
	{
		x=0;y=0;
		getchar()
		scanf("%s",b);
		getchar()
		len1=strlen(a);
		len2=strlen(b);
		len=len1+len2;
		for(i=0;i<len2;i++)
		{
			if(i%2==0)
			   printf("%c",a[x++]);
			else
			   printf("%c",b[y++]);
		}
		printf("\n");
		memset(a,0,sizeof(a));
		memset(b,0,sizeof(b));
	}
	return 0;
} 

Compiler output:
main.c: In function 'main':
main.c:10:26: error: expected ';' before 'scanf'
   10 |                 getchar()
      |                          ^
      |                          ;
   11 |                 scanf("%s",b);
      |                 ~~~~~     
main.c:12:26: error: expected ';' before 'len1'
   12 |                 getchar()
      |                          ^
      |                          ;
   13 |                 len1=strlen(a);
      |                 ~~~~
Language: C

#include<stdio.h>
#include<string.h>
int main()
{
	int i,x,y,len,len1,len2;
	char a[51],b[51];
	while(scanf("%s",a)!=EOF)
	{
		x=0;y=0;
		getchar()
		scanf("%s",f);
		getchar()
		len1=strlen(a);
		len2=strlen(b);
		len=len1+len2;
		for(i=0;i<len;i++)
		{
			if(i%2==0)
			   printf("%c",a[x++]);
			else
			   printf("%c",b[y++]);
		}
		printf("\n");
		memset(a,0,sizeof(a));
		memset(b,0,sizeof(b));
	}
	return 0;
} 

Compiler output:
main.c: In function 'main':
main.c:10:26: error: expected ';' before 'scanf'
   10 |                 getchar()
      |                          ^
      |                          ;
   11 |                 scanf("%s",f);
      |                 ~~~~~     
main.c:12:26: error: expected ';' before 'len1'
   12 |                 getchar()
      |                          ^
      |                          ;
   13 |                 len1=strlen(a);
      |                 ~~~~
Language: C

#include<stdio.h>
int main()
{
    char O[50],E[50];
    scanf("%s%s",&O,&E);
    strlen(O)-strlen(E)=1||0;
    int i;
    for(i=0;i<50;i++)
        printf("%c%c",O[i],E[i]);
}


Compiler output:
main.c: In function 'main':
main.c:6:5: error: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
    6 |     strlen(O)-strlen(E)=1||0;
      |     ^~~~~~
main.c:2:1: note: include '<string.h>' or provide a declaration of 'strlen'
    1 | #include<stdio.h>
  +++ |+#include <string.h>
    2 | int main()
main.c:6:5: warning: incompatible implicit declaration of built-in function 'strlen' [-Wbuiltin-declaration-mismatch]
    6 |     strlen(O)-strlen(E)=1||0;
      |     ^~~~~~
main.c:6:5: note: include '<string.h>' or provide a declaration of 'strlen'
main.c:6:24: error: lvalue required as left operand of assignment
    6 |     strlen(O)-strlen(E)=1||0;
      |                        ^
Language: C

#include
<stdio.h>
int main()
{
    char o[100]= {'\0'},f[100]= {'\0'};
    int i,a=0,b=0;
    while(1)
    {
        scanf("%s",o);
        getchar();
        scanf("%s",f);
        getchar();
        for(i=0; i<100000; i++)
        {
                printf("%c",o[i]);
                printf("%c",f[i]);
            if(o[i]=='\0'||f[i]=='\0')
            {
                printf("\n");
                break;
            }
        }
    }
}


Compiler output:
main.c:1:9: error: #include expects "FILENAME" or <FILENAME>
    1 | #include
      |         ^
main.c:2:1: error: expected identifier or '(' before '<' token
    2 | <stdio.h>
      | ^
Language: C++

#include<iostream>
#include<string>
#include<cstdio>
#include<cstdlib>
#include<algorithm>
#include<cmath>
using namespace std;
int main(){
	string s,t;
	cin>>s>>t;
	for(int i=0;i<s.size();i++){
		cout<<s[i];
		if(i==s.size-1 && s.size()>t.size())cout<<t[i]<<endl;
	}
	cout<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:25: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   13 |                 if(i==s.size-1 && s.size()>t.size())cout<<t[i]<<endl;
      |                       ~~^~~~
      |                             ()
Language: C++

#include <iostream>
using namespace std;
int main(){
	string a,b,c;
	cin>>a>>b;
	for(int i=0;i<b.size();i++){
		c+=a[i];
		c+=b[i];
		}
	}
	if(a.size()>b.size()){
			c+=a[a.size()-1];
		}
	cout<<c<<endl;
	return 0;	
}

Compiler output:
a.cc:11:9: error: expected unqualified-id before 'if'
   11 |         if(a.size()>b.size()){
      |         ^~
a.cc:14:9: error: 'cout' does not name a type
   14 |         cout<<c<<endl;
      |         ^~~~
a.cc:15:9: error: expected unqualified-id before 'return'
   15 |         return 0;
      |         ^~~~~~
a.cc:16:1: error: expected declaration before '}' token
   16 | }
      | ^
Language: C++

#include <iostream>
using namespace std;
int main(){
	string a,b,c;
	cin>>a>>b;
	for(int i=0;i<b.size();i++){
		c+=a[i];
		c+=b[i];
		}
	}
	if(a.size()>b.size()){
			c+=a[i+1];
		}
	cout<<c<<endl;
	return 0;	
}

Compiler output:
a.cc:11:9: error: expected unqualified-id before 'if'
   11 |         if(a.size()>b.size()){
      |         ^~
a.cc:14:9: error: 'cout' does not name a type
   14 |         cout<<c<<endl;
      |         ^~~~
a.cc:15:9: error: expected unqualified-id before 'return'
   15 |         return 0;
      |         ^~~~~~
a.cc:16:1: error: expected declaration before '}' token
   16 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
     
int main(){
 string O,E,M;
 cin >> O >> E;

 for(int i=0;i<O.size();i++)
 {
 M[i]=O[i];
 }
 for(int i=1;i<E.size();i+2)
 M[i]=E[i];
 }

 cout << M << endl;

  return 0;
}

Compiler output:
a.cc:16:2: error: 'cout' does not name a type
   16 |  cout << M << endl;
      |  ^~~~
a.cc:18:3: error: expected unqualified-id before 'return'
   18 |   return 0;
      |   ^~~~~~
a.cc:19:1: error: expected declaration before '}' token
   19 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
     
int main(){
 string O,E,M;
 cin >> O >> E;

 for(int i=0;i<O.size(),i++)
 {
 M[i]=O[i];
 }
 for(int i=1;i<E.size(),i+2)
 M[i]=E[i];
 }

 cout << M << endl;

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:28: error: expected ';' before ')' token
    8 |  for(int i=0;i<O.size(),i++)
      |                            ^
      |                            ;
a.cc:12:28: error: expected ';' before ')' token
   12 |  for(int i=1;i<E.size(),i+2)
      |                            ^
      |                            ;
a.cc: At global scope:
a.cc:16:2: error: 'cout' does not name a type
   16 |  cout << M << endl;
      |  ^~~~
a.cc:18:3: error: expected unqualified-id before 'return'
   18 |   return 0;
      |   ^~~~~~
a.cc:19:1: error: expected declaration before '}' token
   19 | }
      | ^
Language: C++

#include <iostream>
#include <vector>
#include <queue>
#include <sstream>
#include <algorithm>
#include <bitset>
#include <limits>
#include <map>
#include <set>
#include <iomanip>
#include <cmath>

using namespace std;

typedef long long int ll;
typedef std::numeric_limits<double> dbl;
const long long int LL_INF=1LL<<60;

vector<string> split(const string& input, char delimiter)
{
    stringstream stream(input);
    
    string field;
    vector<string> result;
    while (getline(stream, field, delimiter)) {
        result.push_back(field);
    }
    return result;
}

//#define DEBUG

ll A, B, M, N, D, K, Q, W, H, T, X, Y;

int main()
{
    string s1, s2; cin >> s1 >> s2;
    int i1 = 0; i2 = 0;
    for (int i = 0; i < s1.size(); ++i) {
        if (i % 2 == 0) {
            cout << s1[i1]; i1++;
        } else {
            cout << s2[i2]; i2++;
        }
    }
cout << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:38:17: error: 'i2' was not declared in this scope; did you mean 'i1'?
   38 |     int i1 = 0; i2 = 0;
      |                 ^~
      |                 i1
Language: C

#include<stdio.h>
#include<string.h>
     
int main(void){
  char O[51], E[51], A[102];
  int i;
     
  scanf("%s", O);
  scanf("%s", E);
  j = strlen(O);
     
    for(i = 0; i < j; i++){
      A[i * 2] = O[i];
      A[i * 2 + 1] = E[i];
    }
      
    printf("%s\n", A);
     
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:3: error: 'j' undeclared (first use in this function)
   10 |   j = strlen(O);
      |   ^
main.c:10:3: note: each undeclared identifier is reported only once for each function it appears in
Language: Java

import java.util.Scanner;

public class {
	public static void main (String[] args){
	Scanner scan = new Scanner(System.in);

	String kisupas = scan.nextLine();
	String gusupas = scan.nextLine();
	
	String[] kisu = kisupas.split("", 0);
	String[] gusu = gusupas.split("", 0);

	for(int i=0; i<kisu.length; i++){
	System.out.print(kisu[i]);
	if(i != gusu.length)
	System.out.print(gusu[i]);	
	}
	}
    
}

Compiler output:
Main.java:3: error: <identifier> expected
public class {
            ^
1 error
Language: Java

import java.util.Scanner;

public class d{
	public static void main (String[] args){
	Scanner scan = new Scanner(System.in);

	String kisupas = scan.nextLine();
	String gusupas = scan.nextLine();
	
	String[] kisu = kisupas.split("", 0);
	String[] gusu = gusupas.split("", 0);

	for(int i=0; i<kisu.length; i++){
	System.out.print(kisu[i]);
	if(i != gusu.length)
	System.out.print(gusu[i]);	
	}
	}
    
}

Compiler output:
Main.java:3: error: class d is public, should be declared in a file named d.java
public class d{
       ^
1 error
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(){
string a,b,c;
cin>>a>>b;
if(a.size()==b.size()){
	for(int i=0;i<a.size();i++){
		c=c+a[i];
		c=c+b[i];
	}
}
if(a.size()!=b.size()){
	for(int i=0;i<b.size();i++){
		c=c+a[i];
		c=c+b[i];
	}
	c=c+a[a.size-1];
}
	cout<<c<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:17: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   18 |         c=c+a[a.size-1];
      |               ~~^~~~
      |                     ()
Language: C++

#include<iostream>
#include<cstdio>
#include<string>
using namespace std;
int main(){
	string a,b;
	cin>>a>>b;
	for(int i=0;i<a.size();i++){
		cout<<a[i];
		cout<<b[i]:
	}
	cout<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:27: error: expected ';' before ':' token
   10 |                 cout<<b[i]:
      |                           ^
      |                           ;
Language: C++

#include <iostream>
using namespace std;

int main(){
    string a, b;
    cin >> a >> b;
    queue<char> q1, q2;
    for(char c : a) q1.push(c);
    for(char c : b) q2.push(c);
    string ans;
    for(int i = 0; ; i++){
        if(q1.size() == 0 && q2.size() == 0) break;
        if(i % 2 == 0) ans += q1.front(), q1.pop();
        else ans += q2.front(), q2.pop();
    }
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'queue' was not declared in this scope
    7 |     queue<char> q1, q2;
      |     ^~~~~
a.cc:2:1: note: 'std::queue' is defined in header '<queue>'; this is probably fixable by adding '#include <queue>'
    1 | #include <iostream>
  +++ |+#include <queue>
    2 | using namespace std;
a.cc:7:11: error: expected primary-expression before 'char'
    7 |     queue<char> q1, q2;
      |           ^~~~
a.cc:8:21: error: 'q1' was not declared in this scope
    8 |     for(char c : a) q1.push(c);
      |                     ^~
a.cc:9:21: error: 'q2' was not declared in this scope
    9 |     for(char c : b) q2.push(c);
      |                     ^~
a.cc:12:12: error: 'q1' was not declared in this scope
   12 |         if(q1.size() == 0 && q2.size() == 0) break;
      |            ^~
a.cc:12:30: error: 'q2' was not declared in this scope
   12 |         if(q1.size() == 0 && q2.size() == 0) break;
      |                              ^~
a.cc:13:31: error: 'q1' was not declared in this scope
   13 |         if(i % 2 == 0) ans += q1.front(), q1.pop();
      |                               ^~
a.cc:14:21: error: 'q2' was not declared in this scope
   14 |         else ans += q2.front(), q2.pop();
      |                     ^~
Language: C++

# -*- coding: utf-8 -*-

import sys
import subprocess
import json
import time
import math
import re
import sqlite3

O = input()
E = input()
res = ""
for i in range(len(O)):
    res += O[i]
    if i < len(E): res += E[i]

print(res)



Compiler output:
a.cc:1:3: error: invalid preprocessing directive #-
    1 | # -*- coding: utf-8 -*-
      |   ^
a.cc:3:1: error: 'import' does not name a type
    3 | import sys
      | ^~~~~~
a.cc:3:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include<bits/stdc++.h>
#include<string>
#include<cctype> 
#define rep(i,n) for(int i=0;i<(n);i++)
using namespace std;
 
int main(){
  string O,E;
  int i;
  cin >> O >> E; 
  if(O.size()==E.size()){
    rep(i,O.size()){
      cout << O[i] << E[i];
    }
  }ekse{
    rep(i,E.size()){
      cout << O[i] << E[i];
    }
    cout << O[O.size()-1];
  }

  cout << '\n';

  return 0;
} 




Compiler output:
a.cc: In function 'int main()':
a.cc:15:4: error: 'ekse' was not declared in this scope
   15 |   }ekse{
      |    ^~~~
Language: C++

#include<bits/stdc++.h>
#include<string>
#include<cctype> 
#define rep(i,n) for(int i=0;i<(n);i++)
using namespace std;
 
int main(){
  string O,E;
  int i;
  cin >> O >> E; 
  if(O.size()==E.size()){
    rep(i,O.size()){
      cout << O[i] << E[i];
    }
  }ekse{
    rep(i,E.size()){
      cout << O[i] << E[i];
    }
    cout << O[o.size()];
  }

  cout << '\n';

  return 0;
} 


Compiler output:
a.cc: In function 'int main()':
a.cc:15:4: error: 'ekse' was not declared in this scope
   15 |   }ekse{
      |    ^~~~
Language: C++

include <iostream>
using namespace std;

int main(void){
	char ki[50], gu[50], sum[100];
	int cki=0, cgu=0;

	cin >> ki;
	cin >> gu;

	for(int i=0; ; i++){
		if(i%2 == 0){
			sum[i] = ki[cki];
			cki++;
		}else{
			sum[i] = gu[cgu];
			cgu++;
		}
		if(ki[cki]=='\0' && gu[cgu]=='\0')
		  break;
	}
	cout << sum << endl;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <iostream>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:8:9: error: 'cin' was not declared in this scope
    8 |         cin >> ki;
      |         ^~~
a.cc:22:9: error: 'cout' was not declared in this scope
   22 |         cout << sum << endl;
      |         ^~~~
a.cc:22:24: error: 'endl' was not declared in this scope
   22 |         cout << sum << endl;
      |                        ^~~~
Language: C++

#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include <sstream>
#include<iomanip>

//#include<bits/stdc++.h>


using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:28:29: error: expected ';' before 'if'
   28 |                 cout << a[i]
      |                             ^
      |                             ;
   29 | if(b.size()>i)cout<< b[i];
      | ~~
Language: C++

#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include <sstream>
#include<iomanip>

//#include<bits/stdc++.h>


using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:28:29: error: expected ';' before 'if'
   28 |                 cout << a[i]
      |                             ^
      |                             ;
   29 | if(b.size>i)cout<< b[i];
      | ~~
Language: C++

#include<iostream>
#include<string>

using namespace std;

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


Compiler output:
a.cc: In function 'int main()':
a.cc:14:18: error: expected '}' at end of input
   14 |         return 0;
      |                  ^
a.cc:6:12: note: to match this '{'
    6 | int main() {
      |            ^
Language: C++

#include <iostream>
#include <cstdio>
#include <cmath>
#include <string>

using namespace std;
typedef long long ll;

int main(){
  string o, e;
  cin>>o>>e;
  if(o.size()==e.size()){
    for(int i=0; i<o.size(); ++i){
      cout<<o[i]<<e[i];
    }
  }else{
    for(int i=0; i<e.size(); ++i){
      cout<<o[i]<<e[i];
    }
    cout<<o[o.size()-1]
  }
  cout<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:24: error: expected ';' before '}' token
   20 |     cout<<o[o.size()-1]
      |                        ^
      |                        ;
   21 |   }
      |   ~
Language: C++

#include<cstdio>
#include<vector>
#include<iostream>
using namespace std;
int gcd(int a,int b){if(a<b){swap(a,b);}if(b==0){return a;}return gcd(a%b,b);}
int main(void){
	string a,b,c;
	cin>>a>>b;
	for(i=0;i<b.size();i++){
		c.push_back(a[i]);
		c.push_back(b[i]);
	}
	if(a.size()>b.size()){c.push_back(a.back());}
	cout<<c<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:13: error: 'i' was not declared in this scope
    9 |         for(i=0;i<b.size();i++){
      |             ^
Language: C++

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

int main() {
 string O;
 string E;
 
 
 cin >> O;
 cin >> E;
 
for(int i =0; i <E.size(); i++)
{ cout<< E[i];
}
if{(i < O.size()) c.out << O[i];
}
 	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:3: error: expected '(' before '{' token
   16 | if{(i < O.size()) c.out << O[i];
      |   ^
      |   (
Language: C++

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

int main()
{
	string O, E;
	cin >> O >> E;
	for (int i = 0; i < O.length; i++)
	{
		cout << O[i];
		if (i < E.length)
		{
			cout << E[i];
		}
	}
	cout << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:31: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
    9 |         for (int i = 0; i < O.length; i++)
      |                             ~~^~~~~~
      |                                     ()
a.cc:12:27: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   12 |                 if (i < E.length)
      |                         ~~^~~~~~
      |                                 ()
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
string s1,s2;
cin>>s1>>s2;
reverse(s2.begin(),s2.end());
s1+=s2;
for(int i=0;i<s1.size();i++){
if(i%2)cout<<s[i/2];
else cout<<s[s.size()-1-i/2];
}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: 's' was not declared in this scope
    9 | if(i%2)cout<<s[i/2];
      |              ^
a.cc:10:12: error: 's' was not declared in this scope
   10 | else cout<<s[s.size()-1-i/2];
      |            ^
Language: C++

#include <iostream>
#include <string>


int main(void)

	using namespace std;
string odd, even;
  cin >> odd >> even;
  string e,o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i <= e + o; i++)

 return 0; }
  


Compiler output:
a.cc:7:9: error: expected initializer before 'using'
    7 |         using namespace std;
      |         ^~~~~
a.cc:8:1: error: 'string' does not name a type; did you mean 'stdin'?
    8 | string odd, even;
      | ^~~~~~
      | stdin
a.cc:9:3: error: 'cin' does not name a type
    9 |   cin >> odd >> even;
      |   ^~~
a.cc:10:3: error: 'string' does not name a type; did you mean 'stdin'?
   10 |   string e,o;
      |   ^~~~~~
      |   stdin
a.cc:11:3: error: 'e' does not name a type
   11 |   e = even.size();
      |   ^
a.cc:12:3: error: 'o' does not name a type
   12 |   o = odd.size();
      |   ^
a.cc:13:3: error: expected unqualified-id before 'for'
   13 |   for(int i = 0; i <= e + o; i++)
      |   ^~~
a.cc:13:18: error: 'i' does not name a type
   13 |   for(int i = 0; i <= e + o; i++)
      |                  ^
a.cc:13:30: error: 'i' does not name a type
   13 |   for(int i = 0; i <= e + o; i++)
      |                              ^
a.cc:15:12: error: expected declaration before '}' token
   15 |  return 0; }
      |            ^
Language: C++

#include <iostream>
#include <string>


int main(void)

	using namespace std;
string odd, even;
  cin >> odd >> even;
  string e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i <= e + o; i++)
  {
   // if(i % 2 == 0){
    //  cout << odd[i / 2];
    }
   // else{
     // cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc:7:9: error: expected initializer before 'using'
    7 |         using namespace std;
      |         ^~~~~
a.cc:8:1: error: 'string' does not name a type; did you mean 'stdin'?
    8 | string odd, even;
      | ^~~~~~
      | stdin
a.cc:9:3: error: 'cin' does not name a type
    9 |   cin >> odd >> even;
      |   ^~~
a.cc:10:3: error: 'string' does not name a type; did you mean 'stdin'?
   10 |   string e, o;
      |   ^~~~~~
      |   stdin
a.cc:11:3: error: 'e' does not name a type
   11 |   e = even.size();
      |   ^
a.cc:12:3: error: 'o' does not name a type
   12 |   o = odd.size();
      |   ^
a.cc:13:3: error: expected unqualified-id before 'for'
   13 |   for(int i = 0; i <= e + o; i++)
      |   ^~~
a.cc:13:18: error: 'i' does not name a type
   13 |   for(int i = 0; i <= e + o; i++)
      |                  ^
a.cc:13:30: error: 'i' does not name a type
   13 |   for(int i = 0; i <= e + o; i++)
      |                              ^
a.cc:20:5: error: expected declaration before '}' token
   20 |     }
      |     ^
a.cc:21:2: error: expected unqualified-id before 'return'
   21 |  return 0; }
      |  ^~~~~~
a.cc:21:12: error: expected declaration before '}' token
   21 |  return 0; }
      |            ^
Language: C++

#include <iostream>
#include <string>


int main(void)

	using namespace std;
string odd, even;
  cin >> odd >> even;
  string e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i <= e + o; i++)
  {
    if(i % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc:7:9: error: expected initializer before 'using'
    7 |         using namespace std;
      |         ^~~~~
a.cc:8:1: error: 'string' does not name a type; did you mean 'stdin'?
    8 | string odd, even;
      | ^~~~~~
      | stdin
a.cc:9:3: error: 'cin' does not name a type
    9 |   cin >> odd >> even;
      |   ^~~
a.cc:10:3: error: 'string' does not name a type; did you mean 'stdin'?
   10 |   string e, o;
      |   ^~~~~~
      |   stdin
a.cc:11:3: error: 'e' does not name a type
   11 |   e = even.size();
      |   ^
a.cc:12:3: error: 'o' does not name a type
   12 |   o = odd.size();
      |   ^
a.cc:13:3: error: expected unqualified-id before 'for'
   13 |   for(int i = 0; i <= e + o; i++)
      |   ^~~
a.cc:13:18: error: 'i' does not name a type
   13 |   for(int i = 0; i <= e + o; i++)
      |                  ^
a.cc:13:30: error: 'i' does not name a type
   13 |   for(int i = 0; i <= e + o; i++)
      |                              ^
Language: C++

#include <iostream>
#include <string>


int main(void)

	using namespace std;
string odd, even;
  cin >> odd >> even;
  int e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i <= e + o; i++)
  {
    if(i % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc:7:9: error: expected initializer before 'using'
    7 |         using namespace std;
      |         ^~~~~
a.cc:8:1: error: 'string' does not name a type; did you mean 'stdin'?
    8 | string odd, even;
      | ^~~~~~
      | stdin
a.cc:9:3: error: 'cin' does not name a type
    9 |   cin >> odd >> even;
      |   ^~~
a.cc:11:3: error: 'e' does not name a type
   11 |   e = even.size();
      |   ^
a.cc:12:3: error: 'o' does not name a type
   12 |   o = odd.size();
      |   ^
a.cc:13:3: error: expected unqualified-id before 'for'
   13 |   for(int i = 0; i <= e + o; i++)
      |   ^~~
a.cc:13:18: error: 'i' does not name a type
   13 |   for(int i = 0; i <= e + o; i++)
      |                  ^
a.cc:13:30: error: 'i' does not name a type
   13 |   for(int i = 0; i <= e + o; i++)
      |                              ^
Language: C++

#include <iostream>
#include <string>


int main(void)

	using namespace std;
string odd, even;
  cin >> odd >> even;
  int e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i < e + o; i++)
  {
    if(i % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc:7:9: error: expected initializer before 'using'
    7 |         using namespace std;
      |         ^~~~~
a.cc:8:1: error: 'string' does not name a type; did you mean 'stdin'?
    8 | string odd, even;
      | ^~~~~~
      | stdin
a.cc:9:3: error: 'cin' does not name a type
    9 |   cin >> odd >> even;
      |   ^~~
a.cc:11:3: error: 'e' does not name a type
   11 |   e = even.size();
      |   ^
a.cc:12:3: error: 'o' does not name a type
   12 |   o = odd.size();
      |   ^
a.cc:13:3: error: expected unqualified-id before 'for'
   13 |   for(int i = 0; i < e + o; i++)
      |   ^~~
a.cc:13:18: error: 'i' does not name a type
   13 |   for(int i = 0; i < e + o; i++)
      |                  ^
a.cc:13:29: error: 'i' does not name a type
   13 |   for(int i = 0; i < e + o; i++)
      |                             ^
Language: C++

#include <iostream>
#include <string>


int main(void)
{
	using namespace std;
string odd, even;
 { cin >> odd >> even;
  int e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i < e + o; i++)
  {
    if(i % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc: In function 'int main()':
a.cc:21:13: error: expected '}' at end of input
   21 |  return 0; }
      |             ^
a.cc:9:2: note: to match this '{'
    9 |  { cin >> odd >> even;
      |  ^
a.cc:21:13: error: expected '}' at end of input
   21 |  return 0; }
      |             ^
a.cc:6:1: note: to match this '{'
    6 | {
      | ^
Language: C++

#include <iostream>
#include <string>


int main(void)
{
	using namespace std;
string odd, even;
  cin >> odd >> even;
  int e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i < e + o; i++)
  {
    if(i % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc: In function 'int main()':
a.cc:21:13: error: expected '}' at end of input
   21 |  return 0; }
      |             ^
a.cc:6:1: note: to match this '{'
    6 | {
      | ^
Language: C++

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


{
int main()
  cin >> odd >> even;
  int e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i < e + o; i++)
  {
    if(i % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc:6:1: error: expected unqualified-id before '{' token
    6 | {
      | ^
Language: C++

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

int main()
{

  cin >> odd >> even;
  int e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i < e + o; i++)
  {
    if(i % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc: In function 'int main()':
a.cc:8:10: error: 'odd' was not declared in this scope
    8 |   cin >> odd >> even;
      |          ^~~
a.cc:8:17: error: 'even' was not declared in this scope
    8 |   cin >> odd >> even;
      |                 ^~~~
a.cc:20:13: error: expected '}' at end of input
   20 |  return 0; }
      |             ^
a.cc:6:1: note: to match this '{'
    6 | {
      | ^
Language: C++

#include <iostream>
using namespace std;

int main()
{

  cin >> odd >> even;
  int e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i < e + o; i++)
  {
    if(i % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc: In function 'int main()':
a.cc:7:10: error: 'odd' was not declared in this scope
    7 |   cin >> odd >> even;
      |          ^~~
a.cc:7:17: error: 'even' was not declared in this scope
    7 |   cin >> odd >> even;
      |                 ^~~~
a.cc:19:13: error: expected '}' at end of input
   19 |  return 0; }
      |             ^
a.cc:5:1: note: to match this '{'
    5 | {
      | ^
Language: C++

#include <iostream>
using namespace std;

int main()
{
 

 


 
  cin >> odd >> even;
  int e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i < e + o; i++)
  {
    if(i % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc: In function 'int main()':
a.cc:12:10: error: 'odd' was not declared in this scope
   12 |   cin >> odd >> even;
      |          ^~~
a.cc:12:17: error: 'even' was not declared in this scope
   12 |   cin >> odd >> even;
      |                 ^~~~
a.cc:24:13: error: expected '}' at end of input
   24 |  return 0; }
      |             ^
a.cc:5:1: note: to match this '{'
    5 | {
      | ^
Language: C++

#include <iostream>
using namespace std;

int main()
{
 

 
int main()

 
  cin >> odd >> even;
  int e, o;
  e = even.size();
  o = odd.size();
  for(int i = 0; i < e + o; i++)
  {
    if(i % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(i - 1) / 2];
    }
 return 0; }
  


Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    9 | int main()
      |         ^~
a.cc:9:9: note: remove parentheses to default-initialize a variable
    9 | int main()
      |         ^~
      |         --
a.cc:9:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:12:3: error: expected initializer before 'cin'
   12 |   cin >> odd >> even;
      |   ^~~
a.cc:14:7: error: 'even' was not declared in this scope
   14 |   e = even.size();
      |       ^~~~
a.cc:15:7: error: 'odd' was not declared in this scope
   15 |   o = odd.size();
      |       ^~~
a.cc:24:13: error: expected '}' at end of input
   24 |  return 0; }
      |             ^
a.cc:5:1: note: to match this '{'
    5 | {
      | ^