criyle/codenet-compile-errors huggingface dataset:
Language: Java

import java.util.Scanner;
public class Main
{
  public static void main(String[] args)
  {
    Scanner sc = new Scanner(System.in);
    String str = sc.nextLine();
    
    if(Pattern.matches("[A-Z]",str))
      System.out.println(A);
      else
        System.out.println(a);
  }
}


Compiler output:
Main.java:9: error: cannot find symbol
    if(Pattern.matches("[A-Z]",str))
       ^
  symbol:   variable Pattern
  location: class Main
Main.java:10: error: cannot find symbol
      System.out.println(A);
                         ^
  symbol:   variable A
  location: class Main
Main.java:12: error: cannot find symbol
        System.out.println(a);
                           ^
  symbol:   variable a
  location: class Main
3 errors
Language: Java

import java.util.Scanner;
public class Main
{
  public static void main(String[] args)
  {
    Scanner sc = new Scanner(System.in);
    String str = sc.nextLine();
    
    if(str.equals("ABCDEFGHIJKLMNOPQRSTUVWYZ"))
      System.out.println(A);
      else
        System.out.println(a);
  }
}


Compiler output:
Main.java:10: error: cannot find symbol
      System.out.println(A);
                         ^
  symbol:   variable A
  location: class Main
Main.java:12: error: cannot find symbol
        System.out.println(a);
                           ^
  symbol:   variable a
  location: class Main
2 errors
Language: Java

import java.util.Scanner
public class Main
{
  public static void main(String[] args)
  {
    Scanner sc = new Scanner(System.in);
    String str = sc.nextLine();
    
    if(str.equals("ABCDEFGHIJKLMNOPQRSTUVWYZ"))
      System.out.println(A);
      else
        System.out.println(a);
  }
}

Compiler output:
Main.java:1: error: ';' expected
import java.util.Scanner
                        ^
1 error
Language: Java

import java.util.*;
public class main {
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String s = sc.nextLine();
		if((s.charAt(0)-0)>=97){
			System.out.println("a");
		}else{
			System.out.println('A');
		}
	}
}


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

import java.util.*;
public class main {
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String s = sc.nextLine();
		int a = s.charAt(0)-0;
		if(a>=97){
			if(a==97){
				System.out.println((char)(a));
			}else{
				System.out.println((char)(a-1));
			}
		}else{
			if(a==64){
				System.out.println((char)(a));
			}else{
				System.out.println((char)(a-1));
			}
		}
	}
}


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

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

int main(){
  string a;
  cin>>a;
  
  if(a>="a"){
    cout<<"a"<<endl;
  else{
    cout<<"A"<<endl;
 } 
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:10:3: error: expected '}' before 'else'
   10 |   else{
      |   ^~~~
a.cc:8:13: note: to match this '{'
    8 |   if(a>="a"){
      |             ^
Language: C++

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

int main(){
  string a;
  cin>>a;
  
  if(a>="a"){
    cout<<"a"<<endl;
  else{
    cout<<"A"<<endl;
 } 

Compiler output:
a.cc: In function 'int main()':
a.cc:10:3: error: expected '}' before 'else'
   10 |   else{
      |   ^~~~
a.cc:8:13: note: to match this '{'
    8 |   if(a>="a"){
      |             ^
a.cc:12:3: error: expected '}' at end of input
   12 |  }
      |   ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: Java

//import java.util.ArrayList;
import java.util.*;
//import java.lang.*;
import java.util.regex.*;
public class CodeChef{
     public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        String str=sc.next();
        if(Pattern.matches("[A-Z]", str)){
            System.out.print('A');
        }else{
            System.out.print('a');
        }
    }
}

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

import java.util.*;

public class Main{
	public static void main(String[] args) {
		
		char output = a;

		Scanner sc = new Scanner(System.in);

		if(sc.isUpperCase()){
			output = 'A';
		}
		
		System.output.println(output);
	}
}

Compiler output:
Main.java:6: error: cannot find symbol
		char output = a;
		              ^
  symbol:   variable a
  location: class Main
Main.java:10: error: cannot find symbol
		if(sc.isUpperCase()){
		     ^
  symbol:   method isUpperCase()
  location: variable sc of type Scanner
Main.java:14: error: cannot find symbol
		System.output.println(output);
		      ^
  symbol:   variable output
  location: class System
3 errors
Language: Java

import java.io.BufferedReader;
import java.io.IOException;
import java.util.regex.Pattern;

import java.io.InputStreamReader;

public class Alphabet {

    public static void main(String[] args) {

        try(var br = new BufferedReader(new InputStreamReader(System.in))) {

            if(Pattern.matches("[A-Z]", br.readLine())){
                System.out.println("A");
            }else{
                System.out.println("a");
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

Compiler output:
Main.java:7: error: class Alphabet is public, should be declared in a file named Alphabet.java
public class Alphabet {
       ^
1 error
Language: Java

import java.util.Scanner;

class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    String str = scan.nextLine();
    if(str == a ||
       str == b ||
       str == c ||
       str == d ||
       str == e ||
       str == f ||
       str == g ||
       str == h ||
       str == i ||
       str == j ||
       str == k ||
       str == l ||
       str == m ||
       str == n ||
       str == o ||
       str == p ||
       str == q ||
       str == r ||
       str == s ||
       str == t ||
       str == u ||
       str == v ||
       str == w ||
       str == x ||
       str == y ||
       str == z
       ){
      System.out.println("a");
    }else{
      System.out.println("A");
  }
}
       
       
    



Compiler output:
Main.java:38: error: reached end of file while parsing
}
 ^
1 error
Language: Java

public class Alfhabet {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ

		char a = 'B';
		
		discernAlphabetic(a);
	}
	
	private static void discernAlphabetic(char Alphabet) {
		if (Character.isUpperCase(Alphabet)) {
			System.out.println("A");	// 大文字
		}
		else {
			System.out.println("a");	// 小文字
		}
	}
}


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


public class Alfhabet {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ

		char alfabetU = 'B';
		//char alfabetL = 'a';
		
		discernAlphabetic(alfabetU);
		//discernAlphabetic(alfabetL);

		
	}
	
	private static void discernAlphabetic (char alfabet) {
		if (Character.isUpperCase(alfabet)) {
			System.out.println("A");	// 大文字
		}
		else {
			System.out.println("a");	// 小文字
		}
	}
}


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

import java.util.Scanner;

public class A {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if(Character.isLowerCase(s.charAt(0))){
            System.out.println("a");
        }else{
            System.out.println("A");
        }
    }
}


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

import java.util.Scanner;

public class A {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if(Character.isLowerCase(s.charAt(0))){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
}


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

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

int main() {
  char Ch;
  cin >> Ch;
  
  if(Ch > z){
    cout << 'A' << endl;
  } else {
    cout << 'a' << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:11: error: 'z' was not declared in this scope
    8 |   if(Ch > z){
      |           ^
a.cc:12:2: error: expected '}' at end of input
   12 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

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

int main()
{
   char s;
   cin >> s;

   if (isupper(s))
   {
       cout << "A" << endl;
   }
   else
   {
       cout << "a" << endl;
   }
}
   return 0;
}

Compiler output:
a.cc:18:4: 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()
{
  int a;
  if((int a)>65&&(int a)<=91)
    cout<<"A";
  else
    cout<<"a";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:7: error: expected primary-expression before 'int'
    6 |   if((int a)>65&&(int a)<=91)
      |       ^~~
a.cc:6:7: error: expected ')' before 'int'
    6 |   if((int a)>65&&(int a)<=91)
      |      ~^~~
      |       )
a.cc:7:14: error: expected ')' before ';' token
    7 |     cout<<"A";
      |              ^
      |              )
a.cc:6:5: note: to match this '('
    6 |   if((int a)>65&&(int a)<=91)
      |     ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  int a;
  if((int a)>65&&(int a)<=91)
    cout<<"A";
  else
    cout<<"a";

Compiler output:
a.cc: In function 'int main()':
a.cc:6:7: error: expected primary-expression before 'int'
    6 |   if((int a)>65&&(int a)<=91)
      |       ^~~
a.cc:6:7: error: expected ')' before 'int'
    6 |   if((int a)>65&&(int a)<=91)
      |      ~^~~
      |       )
a.cc:7:14: error: expected ')' before ';' token
    7 |     cout<<"A";
      |              ^
      |              )
a.cc:6:5: note: to match this '('
    6 |   if((int a)>65&&(int a)<=91)
      |     ^
a.cc:9:15: error: expected '}' at end of input
    9 |     cout<<"a";
      |               ^
a.cc:4:1: note: to match this '{'
    4 | {
      | ^
Language: C++

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

int main() {

	char c;
	cin >> c;
	if (islower(c)) cout << "a" << endl;
	else cout << "A" << endl;

	return 0;
}


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 >> c;
      |         ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include<cstdlib>
  +++ |+#include <iostream>
    3 | using namespace std;
a.cc:9:13: error: 'islower' was not declared in this scope
    9 |         if (islower(c)) cout << "a" << endl;
      |             ^~~~~~~
a.cc:9:25: error: 'cout' was not declared in this scope
    9 |         if (islower(c)) cout << "a" << endl;
      |                         ^~~~
a.cc:9:25: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:9:40: error: 'endl' was not declared in this scope
    9 |         if (islower(c)) cout << "a" << endl;
      |                                        ^~~~
a.cc:3:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    2 | #include<cstdlib>
  +++ |+#include <ostream>
    3 | using namespace std;
a.cc:10:14: error: 'cout' was not declared in this scope
   10 |         else cout << "A" << endl;
      |              ^~~~
a.cc:10:14: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:10:29: error: 'endl' was not declared in this scope
   10 |         else cout << "A" << endl;
      |                             ^~~~
a.cc:10:29: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
Language: Java

import java.util.*; 
class Main() 
{
public static void main(String []args) 
{
Scanner sc = new Scanner(System.in); 
char c = sc.next().charAt(0); 

if(c>='a' && c<='z') 
{
System.out.println("a");
}
else 
{
System.out.println("A");
}
}
}

Compiler output:
Main.java:2: error: '{' expected
class Main() 
          ^
1 error
Language: C++

#include<iostream>

using namespace std;

int main(){
    char a;
    string S ="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
    cin >> a;
    for(int i = 0;i<52;i++){
        if(a == S[i]){
            if(i <=25){
                ans = i+26;
            }else{
                ans = i-26;
            }
        }
    }
    cout << S[ans];
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
   12 |                 ans = i+26;
      |                 ^~~
      |                 abs
a.cc:14:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
   14 |                 ans = i-26;
      |                 ^~~
      |                 abs
a.cc:18:15: error: 'ans' was not declared in this scope; did you mean 'abs'?
   18 |     cout << S[ans];
      |               ^~~
      |               abs
Language: Java

import java.util.Scanner;
//import java.util.Arrays;
public class Main{
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		Character a = scan.next().charAt(0);
		System.out.println(a.isUpperCase() ? "A" : "a");
	}
}


Compiler output:
Main.java:7: error: no suitable method found for isUpperCase(no arguments)
		System.out.println(a.isUpperCase() ? "A" : "a");
		                    ^
    method Character.isUpperCase(char) is not applicable
      (actual and formal argument lists differ in length)
    method Character.isUpperCase(int) is not applicable
      (actual and formal argument lists differ in length)
1 error
Language: C++

#include<iostream>
using name spacestd;
char s;
int main()
{ 
    cin >> s ;
   if(s>='a'&&s <='z') cout << s ;
  else cout << (char )(s - ('a'-'A'));
  return 0;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'name'
    2 | using name spacestd;
      |       ^~~~
a.cc: In function 'int main()':
a.cc:6:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |     cin >> s ;
      |     ^~~
      |     std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:24: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |    if(s>='a'&&s <='z') cout << s ;
      |                        ^~~~
      |                        std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:8:8: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   else cout << (char )(s - ('a'-'A'));
      |        ^~~~
      |        std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include<bits/stdc++.h>
#define endl '\n';
using namespace std;

long long binpow(long long a, long long b) {
    long long res = 1;
    while (b > 0) {
        if (b & 1)
            res = res * a;
        a = a * a;
        b >>= 1;
    }
    return res;
}
long long  gcd(long long a,long long b)
{
    if(b==0) return a;
    else return gcd(b,a%b);
}

int32_t main()
{

	int k,n;
    cin>>k>>n;
  	int a[k];
    int len = sizeof(a)/sizeof(a[0]);
    sort(a,a+k)
    if(len<=1)
    {
		cout<<n<<endl;
    }
   else
   {
    int sum = 0;
  	for(int i=0;i<n;i++)
    {
		sum+=a[i];
    }
  cout<<sum<<endl;
   }


}


Compiler output:
a.cc: In function 'int32_t main()':
a.cc:28:16: error: expected ';' before 'if'
   28 |     sort(a,a+k)
      |                ^
      |                ;
   29 |     if(len<=1)
      |     ~~          
a.cc:33:4: error: 'else' without a previous 'if'
   33 |    else
      |    ^~~~
Language: C++

#include<cstdio>
int main(){
  char a;
  a=getchar();
  if(a<91) puts('A');
  else puts('a');
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:17: error: invalid conversion from 'char' to 'const char*' [-fpermissive]
    5 |   if(a<91) puts('A');
      |                 ^~~
      |                 |
      |                 char
In file included from /usr/include/c++/14/cstdio:42,
                 from a.cc:1:
/usr/include/stdio.h:714:30: note:   initializing argument 1 of 'int puts(const char*)'
  714 | extern int puts (const char *__s);
      |                  ~~~~~~~~~~~~^~~
a.cc:6:13: error: invalid conversion from 'char' to 'const char*' [-fpermissive]
    6 |   else puts('a');
      |             ^~~
      |             |
      |             char
/usr/include/stdio.h:714:30: note:   initializing argument 1 of 'int puts(const char*)'
  714 | extern int puts (const char *__s);
      |                  ~~~~~~~~~~~~^~~
Language: C++

#include<studio.h>
int main(){
  char a;
  a=getchar();
  if(a<91) printf("A\n");
  else printf("a\n");
}

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

#include<bits/stdc++.h>
#define fast cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(false) ;
#define endl '\n'
#define ll long long
using namespace std ;

int main() {
    char chr ;
    cin >> chr ;
    int num = int(char) ;
    if(num>=97 && num<=122) cout << 'a' << endl ;
    else cout << 'A' << endl ;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:15: error: expected primary-expression before 'int'
   10 |     int num = int(char) ;
      |               ^~~
Language: C

#include"stdio.h"

int main () 
{
	char ch;
	ch = getchar();
	
	if((ch>='A' && ch<='Z')
	{
	   printf("A\n");
	   printf("%c is uppercase, so we should print A.",ch);
    }
	else
    {
    	printf("a\n");
    	printf("%c is uppercase, so we should print a.",ch);
	}
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:32: error: expected ')' before '{' token
    8 |         if((ch>='A' && ch<='Z')
      |           ~                    ^
      |                                )
    9 |         {
      |         ~                       
main.c:20:1: error: expected expression before '}' token
   20 | }
      | ^
Language: C++

#include"stdio.h"

int main () 
{
	char ch;
	ch = getchar();
	
	if((ch>='A' && ch<='Z')
	{
	   printf("A\n");
	   printf("%c is uppercase, so we should print A.",ch);
    }
	else
    {
    	printf("a\n");
    	printf("%c is uppercase, so we should print a.",ch);
	}
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:32: error: expected ';' before '{' token
    8 |         if((ch>='A' && ch<='Z')
      |                                ^
      |                                ;
    9 |         {
      |         ~                       
a.cc:13:9: error: expected primary-expression before 'else'
   13 |         else
      |         ^~~~
a.cc:12:6: error: expected ')' before 'else'
   12 |     }
      |      ^
      |      )
   13 |         else
      |         ~~~~
a.cc:8:11: note: to match this '('
    8 |         if((ch>='A' && ch<='Z')
      |           ^
Language: C++

#include"stdio.h"

int main () 
{
	char ch;
	ch = getchar();
	
	if((ch>='A' && ch<='Z')
	{
	   printf("A\n");
	   printf("%c is uppercase, so we should print A.");
    }
	else
    {
    	printf("a\n");
    	printf("%c is uppercase, so we should print a."");
	}
	
	return 0;
}

Compiler output:
a.cc:16:56: warning: missing terminating " character
   16 |         printf("%c is uppercase, so we should print a."");
      |                                                        ^
a.cc:16:56: error: missing terminating " character
   16 |         printf("%c is uppercase, so we should print a."");
      |                                                        ^~~
a.cc: In function 'int main()':
a.cc:8:32: error: expected ';' before '{' token
    8 |         if((ch>='A' && ch<='Z')
      |                                ^
      |                                ;
    9 |         {
      |         ~                       
a.cc:13:9: error: expected primary-expression before 'else'
   13 |         else
      |         ^~~~
a.cc:12:6: error: expected ')' before 'else'
   12 |     }
      |      ^
      |      )
   13 |         else
      |         ~~~~
a.cc:8:11: note: to match this '('
    8 |         if((ch>='A' && ch<='Z')
      |           ^
Language: C++

#include"stdio.h"

int main () 
{
	char ch;
	ch = getchar();
	
	if((ch>='A' && ch<='Z')
	{
	   printf("A\n");
	   printf("%c is uppercase, so we should print A.");
    }
	else
    {
    	printf("a\n");
    	printf("%c is uppercase, so we should print a."")
	}
	
	return 0;
}

Compiler output:
a.cc:16:56: warning: missing terminating " character
   16 |         printf("%c is uppercase, so we should print a."")
      |                                                        ^
a.cc:16:56: error: missing terminating " character
   16 |         printf("%c is uppercase, so we should print a."")
      |                                                        ^~
a.cc: In function 'int main()':
a.cc:8:32: error: expected ';' before '{' token
    8 |         if((ch>='A' && ch<='Z')
      |                                ^
      |                                ;
    9 |         {
      |         ~                       
a.cc:13:9: error: expected primary-expression before 'else'
   13 |         else
      |         ^~~~
a.cc:12:6: error: expected ')' before 'else'
   12 |     }
      |      ^
      |      )
   13 |         else
      |         ~~~~
a.cc:8:11: note: to match this '('
    8 |         if((ch>='A' && ch<='Z')
      |           ^
Language: C++

#include<iostream>
 int main()
 {
   char x;
   std::cin>>x;
   if(x<="a")
     std::cout<<"A";
   else
     std::cout<<"a";
 }


Compiler output:
a.cc: In function 'int main()':
a.cc:6:8: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    6 |    if(x<="a")
      |       ~^~~~~
Language: C++

#include<iostream>
 int main()
 {
   char x;
   std::cin>>x;
   if(x<=a)
     std::cout<<"A";
   else
     std::cout<<"a";
 }

Compiler output:
a.cc: In function 'int main()':
a.cc:6:10: error: 'a' was not declared in this scope
    6 |    if(x<=a)
      |          ^
Language: C++

#include <iostream>

using namespace std;
int main()
{
  char a; cin >> a;
  if(a>='A' && a<='Z') cout << A;
  else cout << a;
  return 0;
}  

Compiler output:
a.cc: In function 'int main()':
a.cc:7:32: error: 'A' was not declared in this scope
    7 |   if(a>='A' && a<='Z') cout << A;
      |                                ^
Language: C++

	char a, b;
	cin >> a;
	if (60 <= a&&a <= 90)
	{
		cout << "A";
	}
	else
	{
		cout << "a";
	}
	cin >> b;
	if (60 <= b && b <= 90)
	{
		cout << "A";
	}
	else
	{
		cout << "a";
	}

Compiler output:
a.cc:2:9: error: 'cin' does not name a type
    2 |         cin >> a;
      |         ^~~
a.cc:3:9: error: expected unqualified-id before 'if'
    3 |         if (60 <= a&&a <= 90)
      |         ^~
a.cc:7:9: error: expected unqualified-id before 'else'
    7 |         else
      |         ^~~~
a.cc:11:9: error: 'cin' does not name a type
   11 |         cin >> b;
      |         ^~~
a.cc:12:9: error: expected unqualified-id before 'if'
   12 |         if (60 <= b && b <= 90)
      |         ^~
a.cc:16:9: error: expected unqualified-id before 'else'
   16 |         else
      |         ^~~~
Language: C++

char a,b;
a>>cin();
if(60=<a=<90)
{
cout<<"A"
}else
{
cout<<"a"
}
b>>cin();
if(60=<b=<90)
{
cout<<"A"
}else
{
cout<<"a"
}

Compiler output:
a.cc:2:1: error: 'a' does not name a type
    2 | a>>cin();
      | ^
a.cc:3:1: error: expected unqualified-id before 'if'
    3 | if(60=<a=<90)
      | ^~
a.cc:6:2: error: expected unqualified-id before 'else'
    6 | }else
      |  ^~~~
a.cc:10:1: error: 'b' does not name a type
   10 | b>>cin();
      | ^
a.cc:11:1: error: expected unqualified-id before 'if'
   11 | if(60=<b=<90)
      | ^~
a.cc:14:2: error: expected unqualified-id before 'else'
   14 | }else
      |  ^~~~
Language: C++

#include<iostrem>
#include<conio.h>
using namespace std;
int main()
{if (a=A.toupper)
  cout<<'A';
 else
   cout<<'a';
 return 0;
}

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

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


int main(){
	char c;
	cin >> c;
	if (isupper(c))
		cout << 'A' << endl;
	else
		cout << 'a' << endl;
	
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |         cin >> c;
      |         ^~~
      |         std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:9:17: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |                 cout << 'A' << endl;
      |                 ^~~~
      |                 std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:9:32: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    9 |                 cout << 'A' << endl;
      |                                ^~~~
      |                                std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:11:17: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   11 |                 cout << 'a' << endl;
      |                 ^~~~
      |                 std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:11:32: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   11 |                 cout << 'a' << endl;
      |                                ^~~~
      |                                std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

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


int main(){
	char c;
	cin >> c;
	if (isupper(c))
		cout << 'A' << endl;
	else
		cout << 'a' << endl;
	
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    9 |         cin >> c;
      |         ^~~
      |         std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:11:17: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   11 |                 cout << 'A' << endl;
      |                 ^~~~
      |                 std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:11:32: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   11 |                 cout << 'A' << endl;
      |                                ^~~~
      |                                std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:13:17: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   13 |                 cout << 'a' << endl;
      |                 ^~~~
      |                 std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:13:32: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   13 |                 cout << 'a' << endl;
      |                                ^~~~
      |                                std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: Java

Source Code 

Copy
Copy
import java.util.*;
 
public calss Main{
public static void main(String args[])
	{
  
  Scanner s= new Scanner(System.in);
  char s1 =s.next().charAt(0);
  
  if(s1 >='A' && s1 <= 'Z')
    System.out.println("A");
   else
  	System.out.println("a");
	
    }
  
}

Compiler output:
Main.java:1: error: class, interface, enum, or record expected
Source Code 
^
Main.java:7: error: class, interface, enum, or record expected
public calss Main{
       ^
Main.java:8: error: unnamed classes are a preview feature and are disabled by default.
public static void main(String args[])
              ^
  (use --enable-preview to enable unnamed classes)
Main.java:21: error: class, interface, enum, or record expected
}
^
4 errors
Language: Java

import java.util.*;

public calss Main{
public static void main(String args[])
	{
  
  Scanner s= new Scanner(System.in);
  String s1 =s.next.charAt(0);
  
  if(s1 >='A' && s1 <= 'Z')
    System.out.println("A")
   else
  	System.out.println("a")
	
    }
  
}


Compiler output:
Main.java:3: error: class, interface, enum, or record expected
public calss Main{
       ^
Main.java:4: error: unnamed classes are a preview feature and are disabled by default.
public static void main(String args[])
              ^
  (use --enable-preview to enable unnamed classes)
Main.java:11: error: ';' expected
    System.out.println("A")
                           ^
Main.java:13: error: ';' expected
  	System.out.println("a")
  	                       ^
Main.java:17: error: class, interface, enum, or record expected
}
^
5 errors
Language: C++

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

int main() {
  char A;
  cin >> A;
  if (isupper('A')) {
    cout << A;
  }
  else {
    cout << a;
  }
  cout << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:13: error: 'a' was not declared in this scope
   11 |     cout << a;
      |             ^
Language: C++

#include <iostream>
#include <cctype>

int main(){	
  	char c;
  	cin >> c;	
  	
  	cout << (isupper(c) ? 'A' : 'a') << endl;	
  
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |         cin >> c;
      |         ^~~
      |         std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:8:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |         cout << (isupper(c) ? 'A' : 'a') << endl;
      |         ^~~~
      |         std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:8:45: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |         cout << (isupper(c) ? 'A' : 'a') << endl;
      |                                             ^~~~
      |                                             std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <iostream>
#include <cctype>

int main(){	
  	cin.sync_with_stdio(false);
  	cin.tie(NULL);	
  	
  	char c;
  	cin >> c;
  	cout << (isupper(c) ? c : tolower(c)) << endl;
  
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |         cin.sync_with_stdio(false);
      |         ^~~
      |         std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:10:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   10 |         cout << (isupper(c) ? c : tolower(c)) << endl;
      |         ^~~~
      |         std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:10:50: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   10 |         cout << (isupper(c) ? c : tolower(c)) << endl;
      |                                                  ^~~~
      |                                                  std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <stdio>
using namespace std;

int main(void){
	char a;
    cin >> a;
    if(a - (int)'a' <= 25){
    	cout << "a";
    }else{
    	cout << "B";
    }
}


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

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

void main(){
  char S;cin>>S;
  if (S>='A'&&S<='Z') cout<<'A'<endl;
  else cout<<'a'<<endl;
}


Compiler output:
a.cc:2:1: error: 'cout' does not name a type
    2 | cout namespace std;
      | ^~~~
a.cc:4:1: error: '::main' must return 'int'
    4 | void main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:5:10: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   char S;cin>>S;
      |          ^~~
      |          std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:6:23: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |   if (S>='A'&&S<='Z') cout<<'A'<endl;
      |                       ^~~~
      |                       std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:6:33: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    6 |   if (S>='A'&&S<='Z') cout<<'A'<endl;
      |                                 ^~~~
      |                                 std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:7:8: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |   else cout<<'a'<<endl;
      |        ^~~~
      |        std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:7:19: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 |   else cout<<'a'<<endl;
      |                   ^~~~
      |                   std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include<bits.stdc++>
cout namespace std;

void main(){
  char S;cin>>S;
  if (S>='A'&&S<='Z') cout<<'A'<endl;
  else cout<<'a'<<endl;
}

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

#include <stdio.h>
int main(){
  char c;
  cin >> c;
  if(c=='a-z') cout << 'a' << endl;
  else cout << 'A' << endl;
  return 0;
}

Compiler output:
a.cc:5:9: warning: multi-character character constant [-Wmultichar]
    5 |   if(c=='a-z') cout << 'a' << endl;
      |         ^~~~~
a.cc: In function 'int main()':
a.cc:4:3: error: 'cin' was not declared in this scope
    4 |   cin >> c;
      |   ^~~
a.cc:5:16: error: 'cout' was not declared in this scope
    5 |   if(c=='a-z') cout << 'a' << endl;
      |                ^~~~
a.cc:5:31: error: 'endl' was not declared in this scope
    5 |   if(c=='a-z') cout << 'a' << endl;
      |                               ^~~~
a.cc:6:8: error: 'cout' was not declared in this scope
    6 |   else cout << 'A' << endl;
      |        ^~~~
a.cc:6:23: error: 'endl' was not declared in this scope
    6 |   else cout << 'A' << endl;
      |                       ^~~~
Language: C++

#include <iostream>

using namespace std;

int main()
{
   char x;
   cin >> x;

   if (isupper(x))
   {
       cout << A << endl;
   }
   else
   {
       cout << a << endl;
   }

   return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:16: error: 'A' was not declared in this scope
   12 |        cout << A << endl;
      |                ^
a.cc:16:16: error: 'a' was not declared in this scope
   16 |        cout << a << endl;
      |                ^
Language: C++

#include <iostream>

using namespace std;

int main()
{
   int x;
   cin >> x;

   if (isupper(x))
   {
       cout << A << endl;
   }
   else
   {
       cout << a << endl;
   }

   return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:16: error: 'A' was not declared in this scope
   12 |        cout << A << endl;
      |                ^
a.cc:16:16: error: 'a' was not declared in this scope
   16 |        cout << a << endl;
      |                ^
Language: C++

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

int main(){
  char alpa;
  cin >> alpa;
  
  if(isupper(alpa)){
    cout << "A" << endl;
  }
  else{
    cout << "a" << endl;
  }
  return 0;
}

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

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

int main(){
  char alpa;
  cin >> alpa;
  
  if(isupper(alpa)){
    cout << "A" << endl;
  }
  else{
    cout << "a" << endl;
  }
  return 0;
}

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

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define debug(a) cout << #a << ": " << a << endl
#define sz(a) int(a.size())
#define vi vector<int>
#define rep(i,n) for(int i=0;i<n;i++)
#define forr(i, st, en) for(int i = st; i <= en; i++)
#define all(v) (v).begin(),(v).end()
#define fast cin.tie(0); ios::sync_with_stdio(false)
#define int long long

int32_t main(){ fast;
               char ch; cin>>ch;
               if(ch == tolower(ch)){
                   cout<<'a';
               }
               else cout<<'A';
}


Compiler output:
Main.java:1: error: illegal character: '#'
#include<bits/stdc++.h>
^
Main.java:1: error: class, interface, enum, or record expected
#include<bits/stdc++.h>
        ^
Main.java:3: error: unnamed classes are a preview feature and are disabled by default.
using ll = long long;
^
  (use --enable-preview to enable unnamed classes)
Main.java:3: error: '.class' expected
using ll = long long;
                ^
Main.java:4: error: illegal character: '#'
#define debug(a) cout << #a << ": " << a << endl
^
Main.java:4: error: class, interface, enum, or record expected
#define debug(a) cout << #a << ": " << a << endl
        ^
Main.java:4: error: illegal character: '#'
#define debug(a) cout << #a << ": " << a << endl
                         ^
Main.java:5: error: illegal character: '#'
#define sz(a) int(a.size())
^
Main.java:6: error: illegal character: '#'
#define vi vector<int>
^
Main.java:7: error: illegal character: '#'
#define rep(i,n) for(int i=0;i<n;i++)
^
Main.java:7: error: class, interface, enum, or record expected
#define rep(i,n) for(int i=0;i<n;i++)
                             ^
Main.java:7: error: class, interface, enum, or record expected
#define rep(i,n) for(int i=0;i<n;i++)
                                 ^
Main.java:8: error: illegal character: '#'
#define forr(i, st, en) for(int i = st; i <= en; i++)
^
Main.java:8: error: class, interface, enum, or record expected
#define forr(i, st, en) for(int i = st; i <= en; i++)
                                        ^
Main.java:8: error: class, interface, enum, or record expected
#define forr(i, st, en) for(int i = st; i <= en; i++)
                                                 ^
Main.java:9: error: illegal character: '#'
#define all(v) (v).begin(),(v).end()
^
Main.java:10: error: illegal character: '#'
#define fast cin.tie(0); ios::sync_with_stdio(false)
^
Main.java:10: error: class, interface, enum, or record expected
#define fast cin.tie(0); ios::sync_with_stdio(false)
                         ^
Main.java:11: error: illegal character: '#'
#define int long long
^
Main.java:14: error: class, interface, enum, or record expected
               char ch; cin>>ch;
                        ^
Main.java:15: error: class, interface, enum, or record expected
               if(ch == tolower(ch)){
               ^
Main.java:17: error: class, interface, enum, or record expected
               }
               ^
Main.java:19: error: class, interface, enum, or record expected
}
^
23 errors
Language: Java

import java.util.Scanner;
public class MainA {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String alpha = scan.next();
		
		if(Character.isUpperCase(alpha.charAt(0))) {
			System.out.println("A");
		}else {
			System.out.println("a");
		}

	}

}


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

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

int main()
{
  char a;
  
  cin>>a;
  
  if(a>='a' && a<='z')
  {
    cout<<"a"<<endl;
  }
  else
  {
    cout<<"A"<<endl;
  }
  
  return 0;
}

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

##include <bits/stdc++.h>
using namespace std;
int main()
{
	char ch;
	if(islower(ch)) cout << "a";
	else cout << "A";
	return 0;
}


Compiler output:
a.cc:1:1: error: stray '##' in program
    1 | ##include <bits/stdc++.h>
      | ^~
a.cc:1:3: error: 'include' does not name a type
    1 | ##include <bits/stdc++.h>
      |   ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:12: error: 'islower' was not declared in this scope
    6 |         if(islower(ch)) cout << "a";
      |            ^~~~~~~
a.cc:6:25: error: 'cout' was not declared in this scope
    6 |         if(islower(ch)) cout << "a";
      |                         ^~~~
a.cc:7:14: error: 'cout' was not declared in this scope
    7 |         else cout << "A";
      |              ^~~~
Language: C++

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

int main () {
  string x;
  int >> x;
  
  if (x >="a" && "z" >= x) {
    cout << "a" << endl;
  }
  else {
    cout << "A" << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:7: error: expected unqualified-id before '>>' token
    6 |   int >> x;
      |       ^~
Language: C++

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

int main () {
  string al;
  int >> al;
  
  if (al >="a" && "z" >= al){
    cout << "a" << endl;
    
  else {
    cout << "A" << endl;
  }
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:6:7: error: expected unqualified-id before '>>' token
    6 |   int >> al;
      |       ^~
a.cc:11:3: error: expected '}' before 'else'
   11 |   else {
      |   ^~~~
a.cc:8:29: note: to match this '{'
    8 |   if (al >="a" && "z" >= al){
      |                             ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int α;
  cin>>α;
  
  if(islower(n)){
    cout<<"a"<<endl;
  }
  else{
    cout<<"A"<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: 'n' was not declared in this scope; did you mean 'yn'?
    8 |   if(islower(n)){
      |              ^
      |              yn
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int c;
  cin>>c;
  
  if(isupper(n)){
    cout<<"A"<<endl;
  }
  else{
    cout<<"a"<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: 'n' was not declared in this scope
    8 |   if(isupper(n)){
      |              ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int α;
  cin>>α;
  
  if(isupper(n)){
    cout<<"A"<<endl;
  }
  else{
    cout<<"a"<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: 'n' was not declared in this scope; did you mean 'yn'?
    8 |   if(isupper(n)){
      |              ^
      |              yn
Language: Java

/*
package com.company.practice;
*/

import java.util.Scanner;
import java.lang.*;
import java.util.Scanner;

import static java.lang.Character.isUpperCase;

public class abc171main {
    public static void main(String[] args)
    {
        Scanner key = new Scanner(System.in);
        char s = key.next().charAt(0);
        if(isUpperCase(s))
            System.out.println("A");
        else
            System.out.println("a");
    }
}


Compiler output:
Main.java:11: error: class abc171main is public, should be declared in a file named abc171main.java
public class abc171main {
       ^
1 error
Language: Java

import java.util.*;
import java.lang.*;

public class solution{
	public static void main(String[] args)
    {
      Scanner key = new Scanner(System.in);
      char a = key.next();
      if(isUpperCase(a))
        System.out.println("A");
      else
        System.out.println("a");
    }
}

Compiler output:
Main.java:4: error: class solution is public, should be declared in a file named solution.java
public class solution{
       ^
Main.java:8: error: incompatible types: String cannot be converted to char
      char a = key.next();
                       ^
Main.java:9: error: cannot find symbol
      if(isUpperCase(a))
         ^
  symbol:   method isUpperCase(char)
  location: class solution
3 errors
Language: C

#include<stdio.h>

int main(){
  char N[];
  scanf("%c",&N);
  
  if(N>='A'&&N<='Z'){
    printf("A");
  }
  else {
    printf("a");
  }
  
  return 0;
}
  

Compiler output:
main.c: In function 'main':
main.c:4:8: error: array size missing in 'N'
    4 |   char N[];
      |        ^
main.c:7:7: warning: comparison between pointer and integer
    7 |   if(N>='A'&&N<='Z'){
      |       ^~
main.c:7:15: warning: comparison between pointer and integer
    7 |   if(N>='A'&&N<='Z'){
      |               ^~