A simple program
return
//include this file for cout
#include <iostream.h>
int main()
{
   //print out the text string,
   //"Hello, World!"
   cout << "Hello, World!"
       << endl;
   return 0;
}
This line is necessary
because the return type of
main is int (see above).
We'll talk more about
functions and return types
later, but for now
understand that because
the function's return type is
int, the function must
return an int (integer). To
return 0 (which is an
integer, we simply write
return 0;.