Breaking News: Grepper is joining You.com. Read the official announcement!

What should main() return in C++?

Heckar answered on September 12, 2021 Popularity 8/10 Helpfulness 8/10

answer What should main() return in C++?

related what do I return in int main() function c++

What should main() return in C++?

Comment

The return value for main indicates how the program exited. Normal exit is 
represented by a 0 return value from main. Abnormal exit is signaled by a 
non-zero return, but there is no standard for how non-zero codes are 
interpreted. As noted by others, void main() is prohibited by the C++ 
standard and should not be used. The valid C++ main signatures are:

int main()

and

int main(int argc, char* argv[])

which is equivalent to

int main(int argc, char** argv)

It is also worth noting that in C++, int main() can be left without a
return-statement, at which point it defaults to returning 0. This is also 
true
with a C99 program. Whether return 0; should be omitted or not is open to 
debate. The range of valid C program main signatures is much greater.

Efficiency is not an issue with the main function. It can only be entered and left once (marking the program's start and termination) according to the C++ standard. For C, re-entering main() is allowed, but should be avoided.

Popularity 8/10 Helpfulness 8/10 Language cpp

Source: Grepper

Tags: c++ return

Link to this answer
Share Copy Link

Contributed on Feb 13 2022

Heckar

0 Answers Avg Quality 2/10

Closely Related Answers

what do I return in int main() function c++

Comment

int main() {
  return 1;
}

Popularity 9/10 Helpfulness 1/10 Language cpp

Source: Grepper

Tags: return function int c++ ret

Link to this answer
Share Copy Link

Contributed on Sep 12 2021

Light Louse

0 Answers Avg Quality 2/10

What should main() return in C++?

Contents

More Related Answers

What should main() return in C++?

Closely Related Answers

what do I return in int main() function c++

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.