Mabye you should post the error too, easier to find the error then than going through the entire code.

It`s simple :)

int i;
i++; //Postfix
++i; //Prefix

I`ll try.
std is a namespace, and std::cout, refers to the object in std called cout.
So you can define an object called cout, without breaking the one definition rule. For example: In a large...