#include <stdio.h> void main() { m(); } void m() { }
Standard input is empty
prog.c:3:6: error: return type of ‘main’ is not ‘int’ [-Werror=main]
 void main()
      ^
prog.c: In function ‘main’:
prog.c:7:5: error: implicit declaration of function ‘m’ [-Werror=implicit-function-declaration]
     m();
     ^
prog.c: At top level:
prog.c:11:6: error: conflicting types for ‘m’ [-Werror]
 void m()
      ^
prog.c:7:5: note: previous implicit declaration of ‘m’ was here
     m();
     ^
cc1: all warnings being treated as errors
		
		
	
	Standard output is empty