"return" with no value? what that?

[zhuzhanhao1991]

void Game::run( HWND hwnd )
{
if ( graphics == NULL ) // if graphics not initialized
return;
.........
.........
if( frameTime < MIN_FRAME_TIME )
{
sleepTime = (DWORD)((MIN_FRAME_TIME - frameTime)*1000);
timeBeginPeriod(1);
Sleep( sleepTime );
timeEndPeriod(1);
return;
}
.....................................
......
}

I now return 0, return 1 and return any other value.
but what does a return without any value do? I sew it several times, but still don't know what it is. and how to use it.

[Zhuge]

It's the same as any other return, just that the function doesn't return anything (note the void) so you have no value to put there.

[zhuzhanhao1991]

@Zhuge
In a int function return 0 will exit the program, and other kind of function return a value, then the function get the value. What will happen when a void function return. same the the int function of return 0? and kill the program?

[Zhuge]

It simply exits the function early, exactly as if you had reached the end of it.

[Peter87]

In a int function return 0 will exit the program

It exits the function, not the whole program.

[andywestken]

Unless the function you're exiting is main(), of course!

Andy