Can I omit return from main in C?
c, c99, program-entry-point
Solution
Yes, as of C99, reaching the `}` at the end of main returns 0 if the return type of `main` is compatible with `int`.
5.1.2.2.3 Program termination
If the return type of the `main` function is a type compatible with int, a return from the initial call to the `main` function is equivalent to calling the `exit` function with the value returned by the `main` function as its argument;11) reaching the `}` that terminates the `main` function returns a value of 0. If the return type is not compatible with `int`, the termination status returned to the host environment is unspecified.
Problem
In C++, 3.6.1 Main function (3.6.1/5) A return statement in main has the effect of leaving the main function (destroying any objects with automatic storage duration) and calling exit with the return value as the argument. If control reaches the end of main without encountering a return statement, the effect is that of executing return 0; Can I do the following in C99 without return 0? ``` int main() { } ```