Thread: Making .h files

I feel really bad for asking this, but I've completely forgotten how to make .h files.

Suppose i had this class. How would I seperate it into .h and .cpp files:

Code:

class P {
public:
      P();
      ~P();
void      setI(int num);
void printP();
private:
      int i;
};

P::P() {}

P::~P() {}

void P::setI(int num) {
      i = num;
}

void P::printP() {
       cout<<i<<endl;
}