Question

All I really know is PHP and I used the decbin function etc, It was fairly easy to do. In this C++ program I want to do the same thing, just a simple number or string how would I do this?

Answer 1

A simple function could be defined such as this:

void binary(int decimal) {
   int remainder;

   if(decimal <= 1) {
       std::cout << decimal;
       return;
   }
   remainder = decimal % 2;
   binary(decimal >> 1);    
   std::cout << remainder;
}

Although there are many other resources on the web on how to do this..

A noteworthy question for efficiency of it here, as you may want more than just that:
Efficiently convert between Hex, Binary, and Decimal in C/C++