What is main must return int error?

The error message is trying to tell you that main must return int. return 0; is superfluous – main (and only main) returns 0 by default when the end of the function is reached. For people who are new to programming who may not know that it is a good habbit to get into.

How do I return a main in C++?

The normal exit of program is represented by zero return value. If the code has errors, fault etc., it will be terminated by non-zero value. In C++ language, the main() function can be left without return value. By default, it will return zero.

What should main return C?

What should main() return in C and C++? The return value for main is used to indicate how the program exited. If the program execution was normal, a 0 return value is used. Abnormal termination(errors, invalid inputs, segmentation faults, etc.) is usually terminated by a non-zero return.

What is void main in C++ language?

The void main() indicates that the main() function will not return any value, but the int main() indicates that the main() can return integer type data. When our program is simple, and it is not going to terminate before reaching the last line of the code, or the code is error free, then we can use the void main().

Can we write void main in C++?

On systems that don’t provide such a facility the return value is ignored, but that doesn’t make “void main()” legal C++ or legal C. Note: Even if your compiler accepts void main() avoid it, or risk being considered ignorant by C and C++ programmers. In C++, main() need not contain an explicit return statement.

What does return statement do in C++?

Terminates the execution of a function and returns control to the calling function (or to the operating system if you transfer control from the main function). Execution resumes in the calling function at the point immediately following the call.

What is main return type?

main function return type is integer by default. But it cam be void also . When return type is integer ,you have to include “return 0” statement at the end . This line returns zero to the operating system at the end of the program.