OJ Board

why following code on-line judge compiler error? when I using following code, it's ok. I want to ask, when I using int main(),
what value should I return?return 0? or other value?
and why I can't use void main instead of int main?

Current C++ standard requires that you use 'int main()'.

It should return 0. Non-zero exit code is used to indicate runtime errors, which is yet another reason to avoid 'void main()' in C - should it by accident return a non-zero value to caller, your submission will be judged as RE.

This has come up so often that this should probably go into a coding styles FAQ (if its not already there).

mf wrote:Current C++ standard requires that you use 'int main()'.

More meat to mf's statement -- void main() *never was* C++; read this.