Why is the output of this code vary to compiler? 😐

Question

#include<stdio.h>
main()
{
int a=5;
printf("%d %d %d", ++a, a,a++) ;
}

Answer 1

Since u are returning 0, your header should be int main() and not simply main()

Answer 2

Modern compilers may complain about main function return type being undefined or be set to void.

About the why ...

https://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points

Answer 3

What are the outputs you get? And what compilers r being used?

Answer 4

Azhagesan yeah.. i checked.. other versions of codeblocks show different output..

Answer 5

I think it should be by default integer.. (edited).. then the real ans plz. ❤

Answer 6

775 in codeblocks IDE(version 17.12)
GNU GCC compiler

Answer 7

Mohammad Hasan but thats just only one you have used

Answer 8

Are you sure this code output varies with compiler.? I think it's not