Thread: return value from main()

The return value is passed back to the invoker when the program terminates. It's nice to tell the invoker how you went.
system() for example might use such a value: http://www.cplusplus.com/reference/c...ib/system.html

and you might want to write a little math program or something, eg:

Code:

#include <stdlib.h>

int main(int argc, char* argv[])
{
    int res = 0;
    if(argc >= 3)
        res = atoi(argv[1]) + atoi(argv[2]);
    return res;
}

Which pointlessly adds 2 numbers like so:
./pointless.exe 5 10
= 15