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

#include <aiostream>
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:1:10: fatal error: aiostream: No such file or directory
    1 | #include <aiostream>
      |          ^~~~~~~~~~~
compilation terminated.
Language: C++

#include <stdio.h>
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:19:7: error: 'cout' was not declared in this scope
   19 |       cout << odd[i / 2];
      |       ^~~~
a.cc:2:1: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <stdio.h>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:22:7: error: 'cout' was not declared in this scope
   22 |       cout << even[(i - 1) / 2];
      |       ^~~~
a.cc:22:7: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
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>
#include <string>
using namespace std;
int main(){
string O,E,A,b,c;
cin>>O;
cin>>E;
for(int i=0;O.size() =< i;i++){
 b = O.substr(i,1);
 c = E.substr(i,1);
 A += b+c;
 
}
cout<<A<<endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:23: error: expected primary-expression before '<' token
    8 | for(int i=0;O.size() =< i;i++){
      |                       ^
Language: C++

#include <stdio.h>
using namespace std;

int main(){
 
string even, odd;
 
{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:6:1: error: 'string' was not declared in this scope
    6 | string even, odd;
      | ^~~~~~
a.cc:2:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
    1 | #include <stdio.h>
  +++ |+#include <string>
    2 | using namespace std;
a.cc:8:10: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    8 | {int main(){
      |          ^~
a.cc:8:10: note: remove parentheses to default-initialize a variable
    8 | {int main(){
      |          ^~
      |          --
a.cc:8:10: note: or replace parentheses with braces to value-initialize a variable
a.cc:8:12: error: a function-definition is not allowed here before '{' token
    8 | {int main(){
      |            ^
a.cc:22:2: error: expected '}' at end of input
   22 | }
      |  ^
a.cc:8:1: note: to match this '{'
    8 | {int main(){
      | ^
a.cc:22:2: error: expected '}' at end of input
   22 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include <stdio.h>
using namespace std;

int main(){
 
string even, odd;
 
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:6:1: error: 'string' was not declared in this scope
    6 | string even, odd;
      | ^~~~~~
a.cc:2:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
    1 | #include <stdio.h>
  +++ |+#include <string>
    2 | using namespace std;
a.cc:8:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    8 | int main(){
      |         ^~
a.cc:8:9: note: remove parentheses to default-initialize a variable
    8 | int main(){
      |         ^~
      |         --
a.cc:8:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:8:11: error: a function-definition is not allowed here before '{' token
    8 | int main(){
      |           ^
a.cc:22:2: error: expected '}' at end of input
   22 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope
    5 |   cin >> odd >> even;
      |   ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <stdio.h>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:5:10: error: 'odd' was not declared in this scope
    5 |   cin >> odd >> even;
      |          ^~~
a.cc:5:17: error: 'even' was not declared in this scope
    5 |   cin >> odd >> even;
      |                 ^~~~
a.cc:7:3: error: 'a' was not declared in this scope
    7 |   a = even.size();
      |   ^
a.cc:8:3: error: 'b' was not declared in this scope
    8 |   b = odd.size();
      |   ^
a.cc:11:7: error: 'cout' was not declared in this scope
   11 |       cout << odd[i / 2];
      |       ^~~~
a.cc:11:7: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:11:19: error: 'i' was not declared in this scope
   11 |       cout << odd[i / 2];
      |                   ^
a.cc:14:7: error: 'cout' was not declared in this scope
   14 |       cout << even[(a - 1) / 2];
      |       ^~~~
a.cc:14:7: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:17:11: error: expected ';' before '}' token
   17 |   return 0
      |           ^
      |           ;
   18 | }
      | ~
Language: C++

#include <stdio.h>
using namespace std;

int main(){
 
double a, b;
  for(int a = 0; a < b + a; a++){
    if(a % 2 == 0){
      cout << odd[i / 2];
    }
    else{
      cout << even[(a - 1) / 2];
    }
  }
  return 0
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: 'cout' was not declared in this scope
    9 |       cout << odd[i / 2];
      |       ^~~~
a.cc:2:1: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <stdio.h>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:9:15: error: 'odd' was not declared in this scope
    9 |       cout << odd[i / 2];
      |               ^~~
a.cc:9:19: error: 'i' was not declared in this scope
    9 |       cout << odd[i / 2];
      |                   ^
a.cc:12:7: error: 'cout' was not declared in this scope
   12 |       cout << even[(a - 1) / 2];
      |       ^~~~
a.cc:12:7: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:12:15: error: 'even' was not declared in this scope
   12 |       cout << even[(a - 1) / 2];
      |               ^~~~
a.cc:15:11: error: expected ';' before '}' token
   15 |   return 0
      |           ^
      |           ;
   16 | }
      | ~
Language: C++

#include<iostream>
#include <string>
using namespace std;
int main(){
string O,E,A,b,c;
cin>>O;
cin>>E;
for(i=0;O.size() < i;i++){
 b = O.substr(i,1);
 c = E.substr(i,1);
 A=A+b+c;
 
}
cout<<A<<endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 'i' was not declared in this scope
    8 | for(i=0;O.size() < i;i++){
      |     ^
Language: C

#include<iostream>
#include <string>
using namespace std;
int main(){
string O,E,A,b,c;
cin>>O;
cin>>E;
for(i=0;O.size() < i;i++){
 b = O.substr(i,1);
 c = E.substr(i,1);
 A=A+b+c;
 
}
cout<<A<<endl;
return 0;
}

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

#include <iostream>

using namespace std;

int main()
{
	string o, e;
	char ans[1000];
	int i;
	cin >> o >> e;

	for (i = 0; i < o.size(); i++){
		ans[i * 2] = o[i];
		if (i + 1 == o.size() && o.size == e.size() - 1){
			ans[i * 2 + 1] = e[i];
		}
	}	
	cout << ans << endl;
	return(0);
}



Compiler output:
a.cc: In function 'int main()':
a.cc:14:44: 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 |                 if (i + 1 == o.size() && o.size == e.size() - 1){
      |                                          ~~^~~~
      |                                                ()
Language: C++

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

int main(){
  string O, E;
  cin >> O;
  cin >> E;

  for(int i = 0, i < (O + E).size(), i++){
    if(i % 2)
      cout << O[i / 2];
    else
      cout << E[i / 2];
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:19: error: expected ';' before '<' token
    9 |   for(int i = 0, i < (O + E).size(), i++){
      |                   ^~
      |                   ;
a.cc:9:20: error: expected primary-expression before '<' token
    9 |   for(int i = 0, i < (O + E).size(), i++){
      |                    ^
a.cc:9:41: error: expected ';' before ')' token
    9 |   for(int i = 0, i < (O + E).size(), i++){
      |                                         ^
      |                                         ;
Language: C++

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

int main(){
  string O, E;
  cin >> O;
  cin >> E;

  for(int i = 1, i <=(O + E).size(), i++){
    if(i % 2)
      cout << O[i / 2];
    else
      cout << E[i / 2];
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:19: error: expected ';' before '<=' token
    9 |   for(int i = 1, i <=(O + E).size(), i++){
      |                   ^~~
      |                   ;
a.cc:9:20: error: expected primary-expression before '<=' token
    9 |   for(int i = 1, i <=(O + E).size(), i++){
      |                    ^~
a.cc:9:41: error: expected ';' before ')' token
    9 |   for(int i = 1, i <=(O + E).size(), i++){
      |                                         ^
      |                                         ;
Language: C++

#include<stdio.h>
int main(void){

int i;
int n=0;
char strO[50];
char strE[50];


gets(strO);
gets(strE);

while (strO[n] != '\0') {
        n++;
    }
for(i=0;i<n;i++){
printf("%s",strO[i]);
printf("%s",strE[i]);
}
 
return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:1: error: 'gets' was not declared in this scope; did you mean 'getw'?
   10 | gets(strO);
      | ^~~~
      | getw
Language: C

#include<stdio.h>
int main(void){
 int i,j,n;
char strO[50];
char strE[50];

scanf("%s",strO);
scanf("%s",strE);
 
for(i=0;i<50;i++){
if(strO[i]=='\0'){
n=i;
}

for(j=0;j<n;j++){
printf("%s",strO[j]);
printf("%s",strE[j]);
}

return 0;
}

Compiler output:
main.c: In function 'main':
main.c:21:1: error: expected declaration or statement at end of input
   21 | }
      | ^
Language: C

#include<stdio.h>
int main(void){
 int i,j,n;
char strO[50];
char strE[50];

scanf("%s",strO);
scanf("%s",strE);
 
for(i=0;i<50;i++){
if(arrayO[i]=='\0'){
n=i;
}

for(j=0;j<n;j++){
printf("%s",strO[j]);
printf("%s",strE[j]);
}

return 0;
}

Compiler output:
main.c: In function 'main':
main.c:11:4: error: 'arrayO' undeclared (first use in this function)
   11 | if(arrayO[i]=='\0'){
      |    ^~~~~~
main.c:11:4: note: each undeclared identifier is reported only once for each function it appears in
main.c:21:1: error: expected declaration or statement at end of input
   21 | }
      | ^
Language: C

#include<stdio.h>
int main(void){
 int i,j,n;
char arrayO[50];
char arrayE[50];

scanf("%s",arrayO);
scanf("%s",arrayE);
 
for(i=0;i<50;i++){
if(arrayO[i]=='\0'){
n=i;
}

for(j=0;j<n;J++){
printf("%s",arrayO[j]);
printf("%s",arrayE[j]);
}

return 0;
}


Compiler output:
main.c: In function 'main':
main.c:15:13: error: 'J' undeclared (first use in this function)
   15 | for(j=0;j<n;J++){
      |             ^
main.c:15:13: note: each undeclared identifier is reported only once for each function it appears in
main.c:21:1: error: expected declaration or statement at end of input
   21 | }
      | ^
Language: C++

#include <iostream>
using namespace std;

void main{
return;
}

Compiler output:
a.cc:4:6: error: variable or field 'main' declared void
    4 | void main{
      |      ^~~~
a.cc:5:1: error: expected primary-expression before 'return'
    5 | return;
      | ^~~~~~
a.cc:5:1: error: expected '}' before 'return'
a.cc:4:10: note: to match this '{'
    4 | void main{
      |          ^
a.cc:6:1: error: expected declaration before '}' token
    6 | }
      | ^
Language: C++

#include < iostream >
using namespace std ;
int main () {
string E, O;
cin >> E >> O;
for (int i=0; i < E. size () ; i++) {
cout << E[i];

if(i < O. size () ) cout << O[i];
}
return 0;
}

Compiler output:
a.cc:1:10: fatal error:  iostream : No such file or directory
    1 | #include < iostream >
      |          ^~~~~~~~~~~~
compilation terminated.
Language: C++

#include<iostream>
void main(){
return;
}

Compiler output:
a.cc:2:1: error: '::main' must return 'int'
    2 | void main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:3:1: error: return-statement with no value, in function returning 'int' [-fpermissive]
    3 | return;
      | ^~~~~~
Language: C++

void main(){
return
}

Compiler output:
a.cc:1:1: error: '::main' must return 'int'
    1 | void main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:3:1: error: expected primary-expression before '}' token
    3 | }
      | ^
a.cc:2:7: error: expected ';' before '}' token
    2 | return
      |       ^
      |       ;
    3 | }
      | ~
Language: C

#include<stdio.h>

int main() {
	int i;
	char a[100], b[100];
	scanf_s("%s", a);
	scanf_s("%s", b);
	for (i = 0; a[i+1] != '\0' && b[i+1] != '\0'; i++) 
		printf("%c%c", a[i], b[i]);
	printf("\n");
	return 0;

}

Compiler output:
main.c: In function 'main':
main.c:6:9: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    6 |         scanf_s("%s", a);
      |         ^~~~~~~
      |         scanf
Language: C++

#include <iostream>
#include <string>

using namespace std;

int main()
{
    string o,e;
    cin>>o>>e;
    for(int i=0;o[i]!=\0;i++)
    {
        cout<<o[i];
        if(i%2==1)
        {
            cout<<e[i];
        }
    }
    return 0;
}

Compiler output:
a.cc:10:23: error: stray '\' in program
   10 |     for(int i=0;o[i]!=\0;i++)
      |                       ^
Language: C

#include<stdio.h>

int main(){
	char a1[50],a2[50],txt[100];
	int i,cnt

	scanf("%s",a1);
	scanf("%s",a2);

	for(i=0;;++i){
		if(i%2==0) txt[i]=a1[i];
		if(i%2==1) txt[i]=a2[i];
	
		if(a1[i] == '\0' || a2[i] == '\0')
		break;
	}
	printf("%s\n",txt);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'scanf'
    7 |         scanf("%s",a1);
      |         ^~~~~
Language: C

#include<stdio.h>

int main(){
	char a1[50],a2[50],txt[100];
	int i,cnt

	scanf("%s",a1);
	scanf("%s",a2);

	for(i=0;;++i){
		if(i\2==0) txt[i]=a1[i];
		if(i\2==1) txt[i]=a2[i];
	
		if(a1[i] == '\0' || a2[i] == '\0')
		break;
	}
	printf("%s\n"txt);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'scanf'
    7 |         scanf("%s",a1);
      |         ^~~~~
main.c:11:21: error: stray '\' in program
   11 |                 if(i\2==0) txt[i]=a1[i];
      |                     ^
main.c:11:21: error: expected ')' before numeric constant
   11 |                 if(i\2==0) txt[i]=a1[i];
      |                   ~ ^~
      |                     )
main.c:12:21: error: stray '\' in program
   12 |                 if(i\2==1) txt[i]=a2[i];
      |                     ^
main.c:12:21: error: expected ')' before numeric constant
   12 |                 if(i\2==1) txt[i]=a2[i];
      |                   ~ ^~
      |                     )
main.c:17:22: error: expected ')' before 'txt'
   17 |         printf("%s\n"txt);
      |               ~      ^~~
      |                      )
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <queue>

using namespace std;

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

  string O,E;
  cin >> O >> E;
  int n = O.size();
  int m = E.size();
  for(int i = 0; i < n; i++){
    cout << O[i] << (i != m ? E[i] : '');
  }
  cout << endl;
}

Compiler output:
a.cc:18:38: error: empty character constant
   18 |     cout << O[i] << (i != m ? E[i] : '');
      |                                      ^~
Language: Java

import java.util.*;

public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String O = sc.nextLine();
        String E = sc.nextLine();
        
        for (int i = 0; i < O.length() + E.length() ; i++) {
           if (i % 2 == 0) {
              System.out.println(O.charAt(i/2));
           } else {
              Sustem.out.println(E.charAt(i/2));
            }
         }
   }
}

Compiler output:
Main.java:14: error: package Sustem does not exist
              Sustem.out.println(E.charAt(i/2));
                    ^
1 error
Language: Java

import java.util.*;

public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String O = sc.nextLine();
        String E = sc.nextLine();
        
        for (int i = 0; i < O.length() + E.length() ; i++) {
          if (i % 2 == 0) {
           System.out.println(O.charAt(i/2))
          } else {
             Sustem.out.println(E.charAt(i/2))
         }
   }
}

Compiler output:
Main.java:12: error: ';' expected
           System.out.println(O.charAt(i/2))
                                            ^
Main.java:14: error: ';' expected
             Sustem.out.println(E.charAt(i/2))
                                              ^
Main.java:17: error: reached end of file while parsing
}
 ^
3 errors
Language: C++

#include <iostream>
#include <string>

using namespace std;

int main(){


	string s,t;

	cin>>s>>t;


	for(int i=0;i<s.size();i++){
		cout<<s[i];
		if(i<o.size()){
			cout<<t[i];
		}
	}
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:22: error: 'o' was not declared in this scope
   16 |                 if(i<o.size()){
      |                      ^
Language: C++

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

#define ll long long
#define vvi vector< vector<int> >
#define vi vector<int>
#define All(X) X.begin(),X.end()
#define FOR(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define REP(i,n) for(int i=0;i<(int)(n);i++)
#define pb push_back
#define pii pair<int,int>
#define mp make_pair
#define pi 3.14159265359
#define shosu(X) fixed << setprecision(X)
ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
ll lcm(ll a,ll b){return a/gcd(a,b)*b;}

int main(){
  string a,b;
cin >> a >> b;
for(int i = 0; i < a.size()+b.size(); i++){
if(i % 2 == 0) cout << a[i/2];
else cout << b[(i-1)/2];
}
cout << endl;
}
}


Compiler output:
a.cc:27:1: error: expected declaration before '}' token
   27 | }
      | ^
Language: C

#include <stdio.h>
 
int main(void) {
  char O[52],E[52];
  int i;
  scanf ("%s %s",O,E);
  if (sizeof(O) == sizeof(E)) {
    for (i = 0;i < sizeof(O);i++) {
      putc(O[i]);
      putc(E[i]);
    }
  } else {
    for (i = 0;i < sizeof(O);i++) {
      if (i != sizeof(O) - 1) {
        putc(O[i]);
        putc(E[i]);
      } else {
      putc(O[i]);
      }
    }
  }
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:7: error: too few arguments to function 'putc'
    9 |       putc(O[i]);
      |       ^~~~
In file included from main.c:1:
/usr/include/stdio.h:612:12: note: declared here
  612 | extern int putc (int __c, FILE *__stream) __nonnull ((2));
      |            ^~~~
main.c:10:7: error: too few arguments to function 'putc'
   10 |       putc(E[i]);
      |       ^~~~
/usr/include/stdio.h:612:12: note: declared here
  612 | extern int putc (int __c, FILE *__stream) __nonnull ((2));
      |            ^~~~
main.c:15:9: error: too few arguments to function 'putc'
   15 |         putc(O[i]);
      |         ^~~~
/usr/include/stdio.h:612:12: note: declared here
  612 | extern int putc (int __c, FILE *__stream) __nonnull ((2));
      |            ^~~~
main.c:16:9: error: too few arguments to function 'putc'
   16 |         putc(E[i]);
      |         ^~~~
/usr/include/stdio.h:612:12: note: declared here
  612 | extern int putc (int __c, FILE *__stream) __nonnull ((2));
      |            ^~~~
main.c:18:7: error: too few arguments to function 'putc'
   18 |       putc(O[i]);
      |       ^~~~
/usr/include/stdio.h:612:12: note: declared here
  612 | extern int putc (int __c, FILE *__stream) __nonnull ((2));
      |            ^~~~
Language: C

#include <stdio.h>
 
int main(void) {
  char O[52],E[52];
  int i;
  scanf ("%s %s",O,E);
  if (sizeof(O) == sizeof(E)) {
    for (i = 0;i < sizeof(O);i++) {
      printf ("%c%c",&O[i],&S[i]);
    }
  } else {
    for (i = 0;i < sizeof(O);i++) {
      if (i != sizeof(O) - 1) {
        printf ("%c%c",&O[i],&S[i]);
      } else {
      printf ("%c",&O[i]);
      }
    }
  }
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:29: error: 'S' undeclared (first use in this function)
    9 |       printf ("%c%c",&O[i],&S[i]);
      |                             ^
main.c:9:29: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include <iostream>
#include <sstream>
#include <vector>
#include <cmath>
#include <ctime>
#include <cassert>
#include <iomanip>
#include <cstdio>
#include <float.h>
#include <queue>
#include <set>
#include <map>
#include <fstream>
#include <cstdlib>
#include <string>
#include <cstring>
#include <algorithm>
#include <numeric>
#include <stack>
#include <functional>
       
using namespace std;
       
#define endl '\n'
#define MOD 1000000007
#define INF 1ll<<30
 
// #define MAX 100010
 
#define eps 1e-11
#define bit_max 1ll<<32
#define _USE_MATH_DEFINES
 
// long long binpow(long long a,long long b)
// {
//     if (b == 1) return a;
//     long long res = binpow(a, b/2)%MOD;
//     if (b % 2) return (res*((res*a)%MOD))%MOD;
//     else return (res * res)%MOD;
// }
 
// long long int fact(long long int a)
// {
//     if(a==0||a==1)
//         return 1;
//     long long int ans = 1;
//     for(int i=a;i>=1;i--)
//         ans = (ans * i);
//     return ans;
// }
 
// long long int ivmod(long long int a)
// {
//     return binpow(a,MOD-2);
// }
 
// long long int ncr(long long int a,long long int b)
// {
//     long long int pans=1;
//     for(int i =a;i>max(b,a-b);i--)
//         pans=pans*i;
//     long long int div = fact(min(b,a-b));
//     // cout<<ans<<"            "<<div<<endl;
//     pans = pans/div;
//     return pans;
// }


int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    // #ifndef ONLINE_JUDGE
        // freopen("input.txt","r",stdin);
        // freopen("output.txt","w",stdout);
    // #endif
    string a ,b;
    cin>>a>>b;
    string c="";
    int x =0,y=0;
    for(int i=0;i<a.length()+b.length();i++)
    {
        if((i+1)%2==0)
        {
            cout<<a[x];
            x++;
        }
        else
        {
            cout<<b[z];
            z++;
        }
    }
    cout<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:91:21: error: 'z' was not declared in this scope
   91 |             cout<<b[z];
      |                     ^
Language: Java

import java.util.*;
import java.io.*;
import java.lang.*;
import static java.lang.System.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(in);
		String odd = sc.nextLine();
		String even = sc.nextLine();
		char[] result = new char[odd.length()+even.length()];
		for (int i = 0; i < odd.length(); i++) {
			result[i*2] = odd.charAt(i);
		}
		for (int i = 0; i < even.length(); i++) {
			result[i*2+1] = even.charAt(i);
		}
		out.println(result);
}

Compiler output:
Main.java:19: error: reached end of file while parsing
}
 ^
1 error
Language: C

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#define rep(i,n) for(i=0;i<n;i++)

int in(void){
	int i;
	scanf("%d",&i);
	return i;
}
long long llin(void){
	long long i;
	scanf("%lld",&i);
	return i;
}
int cmp(const void *a,const void *b){
	return *(long long *)a-*(long long *)b;
}
long long min(long long a,long long b){
	return a<b?a:b;
}
long long max(long long a,long long b){
	return a>b?a:b;
}
void dfs(int now,int sum,int cnt){
	int i;
	if(cnt==n){
		ans+=sum==s;
		return ;
	}
	for(i=now;i<10;i++){
		dfs(i+1,sum+i,cnt+1);
	}
	return ;
}

int main(void){
	int i;
	char o[50],e[50];
	scanf("%s %s",o,e);
	for(i=0;i<strlen(e);i++){
		printf("%c%c",o[i],e[i]);
	}
	if(strlen(o)!=strlen(e))
		printf("%c",o[i]);
	puts("");
	return 0;
}

Compiler output:
main.c: In function 'dfs':
main.c:28:17: error: 'n' undeclared (first use in this function)
   28 |         if(cnt==n){
      |                 ^
main.c:28:17: note: each undeclared identifier is reported only once for each function it appears in
main.c:29:17: error: 'ans' undeclared (first use in this function); did you mean 'abs'?
   29 |                 ans+=sum==s;
      |                 ^~~
      |                 abs
main.c:29:27: error: 's' undeclared (first use in this function)
   29 |                 ans+=sum==s;
      |                           ^
Language: C++

#include<cstdio>
#include<cmath>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<iostream>
using namespace std;
int main(){
	char a[55],s[55];
	char c[150];
	int num1=0,num2=0;
	int lena,lens;
	gets(a);
	gets(s);
	lena=strlen(a);
	lens=strlen(s);
	for(int i=0; i<lena+lens; i++){
		if(i%2==0){
			c[i]=a[num1++];
		}
		else{
			c[i]=s[num2++];
		}
	}
	printf("%s\n",c);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
   13 |         gets(a);
      |         ^~~~
      |         getw
Language: C++

#include <algorithm>
#include <bitset>
#include <cassert>
#include <deque>
#include <fstream>
#include <iostream>
#include <map>
#include <math.h>
#include <memory>
#include <queue>
#include <sstream>
#include <stdio.h>
#include <string>
#include <vector>

#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define REP(i, n) FOR(i, 0, n)
#define POW(n) ((n) * (n))
#define ALL(a) (a).begin(), (a).end()
#define dump(v) (cerr << #v << ": " << v << endl)
#define cerr                                                                   \
  if (true)                                                                    \
  cerr

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

typedef vector<int> vi;
typedef vector<double> vd;
typedef vector<string> vs;
typedef vector<unsigned long long> vull;

// ll n = to_T<ll>("114514")
template <class T> T to_T(const string &s) {
  istringstream is(s);
  T res;
  is >> res;
  return res;
}
template <class T> string to_s(const T &a) {
  ostringstream os;
  os << a;
  return os.str();
}

void solve(long long N, long long M) {
  ll ret = min(N, M / 2);
  M -= ret * 2;
  ret += M / 4;

  cout << ret << endl;
}

int main() {
  ios::sync_with_stdio(false);
  string a;
  string b;

  cin >> a;
  cin >> b;

  int num;
  num = (int)a.size;

  a = a + b;
  string answer;

  for(int i = 0; i < num; i++){
    cout << a[i];
    if(i+num<num)
      cout << a[i+num];
  }

  cout << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:65:16: 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 '()' ?)
   65 |   num = (int)a.size;
      |              ~~^~~~
      |                    ()
Language: C++

#include <algorithm>
#include <bitset>
#include <cassert>
#include <deque>
#include <fstream>
#include <iostream>
#include <map>
#include <math.h>
#include <memory>
#include <queue>
#include <sstream>
#include <stdio.h>
#include <string>
#include <vector>

#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define REP(i, n) FOR(i, 0, n)
#define POW(n) ((n) * (n))
#define ALL(a) (a).begin(), (a).end()
#define dump(v) (cerr << #v << ": " << v << endl)
#define cerr                                                                   \
  if (true)                                                                    \
  cerr

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

typedef vector<int> vi;
typedef vector<double> vd;
typedef vector<string> vs;
typedef vector<unsigned long long> vull;

// ll n = to_T<ll>("114514")
template <class T> T to_T(const string &s) {
  istringstream is(s);
  T res;
  is >> res;
  return res;
}
template <class T> string to_s(const T &a) {
  ostringstream os;
  os << a;
  return os.str();
}

void solve(long long N, long long M) {
  ll ret = min(N, M / 2);
  M -= ret * 2;
  ret += M / 4;

  cout << ret << endl;
}

int main() {
  ios::sync_with_stdio(false);
  string a;
  string b;

  cin >> a;
  cin >> b;

  int num;
  num = a.size;

  a = a + b;
  string answer;

  for(int i = 0; i < num; i++){
    cout << a[i];
    if(i+num<num)
      cout << a[i+num];
  }

  cout << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:65:11: error: cannot convert 'std::__cxx11::basic_string<char>::size' from type 'std::__cxx11::basic_string<char>::size_type (std::__cxx11::basic_string<char>::)() const noexcept' {aka 'long unsigned int (std::__cxx11::basic_string<char>::)() const noexcept'} to type 'int'
   65 |   num = a.size;
      |           ^~~~
Language: C++

#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;

int main()
{
    char a[55] = {0}, b[55] = {0};
    gets(a);
    gets(b);
    for(int i = 0; i < strlen (a);i++)
    {
        cout << a[i];
        cout << b[i];
    }
    if(strlen (a) > strlen (b))cout << '\0';
    cout << endl;
    return 0;
}


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(a);
      |     ^~~~
      |     getw
Language: C

#include <stdio.h>

int main(void){
  int i;
  char o[50],e[50],oe[100];

  scanf("%s",&o);
  scanf("%s",&e);
  for(i = 0;i < (sizeof o);i++){
    oe[2*i] = o[i];
    if(e[i]!=null)oe[2*i+1] = e[i];
  }
  printf("%s\n",oe);
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:11:14: error: 'null' undeclared (first use in this function)
   11 |     if(e[i]!=null)oe[2*i+1] = e[i];
      |              ^~~~
main.c:11:14: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

using namespace std;
int main()
{
	string odd;
	string even;
	string passwd;
	cin >> odd >> even;
	for(int i=0;i<51;i++)
	{
		if (i%2==1) 
		{
			passwd[i] = odd[i / 2];
		}
		else
		{
			passwd[i] = even[i / 2];
		}
	}

	cout << passwd << endl;


	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:9: error: 'string' was not declared in this scope
    4 |         string odd;
      |         ^~~~~~
a.cc:1:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
  +++ |+#include <string>
    1 | using namespace std;
a.cc:5:15: error: expected ';' before 'even'
    5 |         string even;
      |               ^~~~~
      |               ;
a.cc:6:15: error: expected ';' before 'passwd'
    6 |         string passwd;
      |               ^~~~~~~
      |               ;
a.cc:7:9: error: 'cin' was not declared in this scope
    7 |         cin >> odd >> even;
      |         ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:7:16: error: 'odd' was not declared in this scope
    7 |         cin >> odd >> even;
      |                ^~~
a.cc:7:23: error: 'even' was not declared in this scope
    7 |         cin >> odd >> even;
      |                       ^~~~
a.cc:12:25: error: 'passwd' was not declared in this scope
   12 |                         passwd[i] = odd[i / 2];
      |                         ^~~~~~
a.cc:16:25: error: 'passwd' was not declared in this scope
   16 |                         passwd[i] = even[i / 2];
      |                         ^~~~~~
a.cc:20:9: error: 'cout' was not declared in this scope
   20 |         cout << passwd << endl;
      |         ^~~~
a.cc:20:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:20:17: error: 'passwd' was not declared in this scope
   20 |         cout << passwd << endl;
      |                 ^~~~~~
a.cc:20:27: error: 'endl' was not declared in this scope
   20 |         cout << passwd << endl;
      |                           ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | using namespace std;
Language: C

#include<stdio.h>
#include<string.h>
int main(){
	char a[1000],b[1000],c[2000];
	while(scanf("%s%s",a,b)!=EOF){
		int i,j,k,o=0,ans;
		i=strlen(a);
		j=strlen(b);
		if(i>j)  ans=2*j;
		else ans=2*i; 
		for(k=0;k<=ans-1;k+=2){
			c[k]=a[o];
			c[k+1]=b[o];
			printf("%c",c[k]);
			printf("%c",c[k+1]);
			o++;
		}
		if(2*j<2*i)printf("%c"a[i-1]);
		else(2*j>2*i)printf("%c",b[j-1]);
		printf("\n");
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:18:39: error: expected ')' before 'a'
   18 |                 if(2*j<2*i)printf("%c"a[i-1]);
      |                                  ~    ^
      |                                       )
main.c:19:30: error: expected ';' before 'printf'
   19 |                 else(2*j>2*i)printf("%c",b[j-1]);
      |                              ^~~~~~
      |                              ;
Language: C++

#include<iostream>
#include<string.h>
using namespace std;
int main()
{
    char O[55],E[55];
	char x[150];
	int i,k=0,m=0,l1,l2;
	gets(O);
		gets(E);
	 l1=strlen(O);
	l2=strlen(E);
	for (i=0;i<l1+l2;i++)
	{	
		x[i]=O[k];
	  i++,k++;
	  x[i]=E[m];
    	m++;
	}	
	for (i=0;i<l1+l2;i++)
		cout << x[i] ;
	cout << endl;
	return 0;
}

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

#include<iostream>
#include<string.h>
using namespace std;
int main()
{
    char O[55],E[55];
	char x[150];
	int i,k=0,m=0,l1,l2;
	while (gets(O))
	{
		gets(E);
	 l1=strlen(O);
	l2=strlen(E);
	for (i=0;i<l1+l2;i++)
	{	
		x[i]=O[k];
	  i++,k++;
	  x[i]=E[m];
    	m++;
	}	
	for (i=0;i<l1+l2;i++)
		cout << x[i] ;
	cout << endl;
	}

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:16: error: 'gets' was not declared in this scope; did you mean 'getw'?
    9 |         while (gets(O))
      |                ^~~~
      |                getw
Language: C++

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<algorithm>
using namespace std;


int main(){
char a[55],b[55];

	gets(a);
	gets(b);
	int len1 = strlen(a);
	int len2 = strlen(b);
	for(int i = 0; i < len1; i++)
	{
		printf("%c",a[i]);
		if(i < len2) printf("%c",b[i]);
		
	}
	printf("\n");
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
   12 |         gets(a);
      |         ^~~~
      |         getw
Language: C++

#include<iostream>
#include<string>

using namespace std;

int main(){

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

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:20: 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 '()' ?)
   15 |     if(o.size()!=e.size=()){
      |                  ~~^~~~
      |                        ()
a.cc:15:26: error: expected primary-expression before ')' token
   15 |     if(o.size()!=e.size=()){
      |                          ^
Language: C++

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>

using namespace std;

int main()
{
	int i,a,b,c;
	char O[1000];
	char E[1000];
	char P[1000];

	cin >> O >> E;

	a=strlen(O)+strlen(E);
	b=0;c=0;
	for(i=0;i<a;i++){
		if((i+1)%2!=0){
			P[i]=O[b];
			b++;
		}else{
			P[i]=E[c];
			c++;
		}
	}
	for(i=0;i<a;i++){
	cout << P[i];
	}

	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:11: error: 'strlen' was not declared in this scope
   17 |         a=strlen(O)+strlen(E);
      |           ^~~~~~
a.cc:5:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    4 | #include <vector>
  +++ |+#include <cstring>
    5 |
Language: C++

#include<stdio.h>
#include<string.h>
int main(){
    char a[100],b[100];
    memset(a,0,sizeof(a));
    memset(b,0,sizeof(b));
    gets(a);
    gets(b);
    int max = strlen(a)>strlen(b) ?strlen(a):strlen(b);
    for(int i = 0; i < max; i++){
        printf("%c%c",a[i],b[i]);
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |     gets(a);
      |     ^~~~
      |     getw
Language: C++

#include<stdio.h>
#include<string.h>
int main(){
	char a[100],b[100];
	memset(a,0,sizeof(a));
	memset(b,0,sizeof(b));
	gets(a);
	gets(b);
	int s=strlen(a),s1=strlen(b),i=0,j=0;
	while(i<s&&j<s1){
		printf("%c",a[i++]);
		printf("%c",b[j++]);
	}
	if(j==s1)
		for(;i<s;i++)
			printf("%c",a[i]);
	else
		for(;j<s1;j++)
			printf("%c",b[j]);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |         gets(a);
      |         ^~~~
      |         getw
Language: Java

import java.util.Scanner;

public class AtCoder_Beginner58_B {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String O = in.nextLine();
		String E = in.nextLine();
		String pass = "";
		for (int x = 0; x < O.length(); x++) {
			pass += String.valueOf(O.charAt(x));
			if (x == E.length()) {
				break;
			} else {
				pass += String.valueOf(E.charAt(x));
			}
		}
		System.out.println(pass);
	}

}


Compiler output:
Main.java:3: error: class AtCoder_Beginner58_B is public, should be declared in a file named AtCoder_Beginner58_B.java
public class AtCoder_Beginner58_B {
       ^
1 error
Language: C++

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<algorithm>
using namespace std;

char a[55],b[55];

int main(){
	gets(a);
	gets(b);
	int len1 = strlen(a);
	int len2 = strlen(b);
	for(int i = 0; i < len1; i++)
	{
		printf("%c",a[i]);
		if(i < len2) printf("%c",b[i]);
		
	}
	printf("\n");
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
   11 |         gets(a);
      |         ^~~~
      |         getw
Language: Java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class ProblemB {

    public static void main(String[] args) throws IOException {
        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        String O = input.readLine();
        String E = input.readLine();
        System.out.println(zip(O, E));
    }

    private static String zip(String first, String second) {
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < second.length(); i++) {
            builder.append(first.charAt(i));
            builder.append(second.charAt(i));
        }
        if (first.length() > second.length()) {
            builder.append(first.charAt(first.length() - 1));
        }
        return builder.toString();
    }
}


Compiler output:
Main.java:5: error: class ProblemB is public, should be declared in a file named ProblemB.java
public class ProblemB {
       ^
1 error
Language: C++

#include<stdio.h>
#include<string.h>
int main(){
    char a[100],b[100];
    gets(a);
    gets(b);
    int max = strlen(a)>strlen(b) ?strlen(a):strlen(b);
    for(int i = 0; i < max; i++){
        printf("%c%c",a[i],b[i]);
    }
    printf("\n");
    return 0;
}


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

#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<cmath>
#include<algorithm>
using namespace std;
char a[100], b[100];
int main()
{
	gets(a);
	gets(b);
	int n = strlen(a);
	int m = strlen(b);
	for(int i = 0; i < min(n, m); i++)printf("%c%c", a[i], b[i]);
	if(n != m)
	{
		if(n > m)printf("%c\n",a[n - 1]);
		else printf("%c\n", b[m - 1]);
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
   10 |         gets(a);
      |         ^~~~
      |         getw
Language: C++

#include<stdio.h>
#include<string.h>
int main(){
    char a[100],b[100];
    gets(a);
    gets(b);
    int max = strlen(a)>strlen(b) ?strlen(a):strlen(b);
    for(int i = 0; i < max; i++){
        printf("%c%c",a[i],b[i]);
    }

    return 0;
}


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

#include<stdio.h>
#include<string.h>
int main(){
	char a[100],b[100];
	gets(a);
	gets(b);
	int s=strlen(a),s1=strlen(b),i=0,j=0;
	while(i<s&&j<s1){
		printf("%c",a[i++]);
		printf("%c",b[j++]);
	}
	if(j==s1)
		for(;i<s;i++)
			printf("%c",a[i]);
	else
		for(;j<s1;j++)
			printf("%c",b[j]);
	return 0;
}

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

#include<stdio.h>
#include<string.h>
int main(){
	char a[100],b[100];
	gets(a);
	gets(b);
	int s=strlen(a),s1=strlen(b),i=0,j=0;
	while(i<s&&j<s1){
		printf("%c",a[i++]);
		printf("%c",b[j++]);
	}
	for(;i<s;i++)
		printf("%c",a[i]);
	for(;j<s1;j++)
		printf("%c",b[j]);	
	return 0;
}

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

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<algorithm>
using namespace std;

char a[55],b[55];

int main(){
	gets(a);
	gets(b);
	int len = strlen(a);
	for(int i = 0; i < len; i++)
	{
		printf("%c%c",a[i],b[i]);
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
   11 |         gets(a);
      |         ^~~~
      |         getw
Language: C++

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

int main() {
    char O[51];
    char E[51];
    gets(O); gets(E);
    int len1 = strlen(O);
    int len2 = strlen(E);
    for (int i = 0; i < len2; i ++) {
        printf("%c", O[i]);
        printf("%c", E[i]);
    }
    if (len2 < len1) {
        printf("%c", O[len2]);
    }
    puts("");
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |     gets(O); gets(E);
      |     ^~~~
      |     getw
Language: C++

#include<iostream>
using namespace std;
int main()
{
char a[10000]={0},b[10000]={0};
cin>>a>>b;
for(int i=0;i<max(strlen(a),strlen(b));i++)
cout<<a[i]<<b[i];
cout<<endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:19: error: 'strlen' was not declared in this scope
    7 | for(int i=0;i<max(strlen(a),strlen(b));i++)
      |                   ^~~~~~
a.cc:2:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    1 | #include<iostream>
  +++ |+#include <cstring>
    2 | using namespace std;
Language: C++

// 怪文書
// #17080666
#include <bits/stdc++.h>
using namespace std;

define rep(i,n) for(int i=0;i<(int)(n);i++)
#define reps(i,n) for(int i=1;i<(int)(n);i++)
 
typedef long long ll;
using namespace std;
int main()
{
  ll n;
  string s[100];
  ll cnt[26];
  cin>>n;
  rep(i,n){
    cin>>s[i];
    sort(s[i].begin(),s[i].end());
  }
  ll min;
  for(char l='a';l<='z';l++){
    min=1000000;
    rep(i,n){
      ll tmp=0;
      rep(j,s[i].length()){
        if(s[i][j]==l)tmp++;
      }
      if(tmp<min)min=tmp;
    }
    cnt[l-'a']=min;
  }
 
  rep(i,26){
    rep(j,cnt[i]){
      printf("%c",'a'+i);
    }
  }
 
  cout<<endl;
 
  return 0;
}

Compiler output:
a.cc:6:1: error: 'define' does not name a type
    6 | define rep(i,n) for(int i=0;i<(int)(n);i++)
      | ^~~~~~
a.cc:6:29: error: 'i' does not name a type
    6 | define rep(i,n) for(int i=0;i<(int)(n);i++)
      |                             ^
a.cc:6:40: error: 'i' does not name a type
    6 | define rep(i,n) for(int i=0;i<(int)(n);i++)
      |                                        ^
a.cc: In function 'int main()':
a.cc:13:3: error: 'll' was not declared in this scope
   13 |   ll n;
      |   ^~
a.cc:15:5: error: expected ';' before 'cnt'
   15 |   ll cnt[26];
      |     ^~~~
      |     ;
a.cc:16:8: error: 'n' was not declared in this scope
   16 |   cin>>n;
      |        ^
a.cc:17:7: error: 'i' was not declared in this scope
   17 |   rep(i,n){
      |       ^
a.cc:17:3: error: 'rep' was not declared in this scope; did you mean 'reps'?
   17 |   rep(i,n){
      |   ^~~
      |   reps
a.cc:21:5: error: expected ';' before 'min'
   21 |   ll min;
      |     ^~~~
      |     ;
a.cc:23:9: error: overloaded function with no contextual type information
   23 |     min=1000000;
      |         ^~~~~~~
a.cc:31:5: error: 'cnt' was not declared in this scope; did you mean 'int'?
   31 |     cnt[l-'a']=min;
      |     ^~~
      |     int