Hex string to hex int and rgb

#include <iostream>

using namespace std;

int main()

{

int red, green, blue;

unsigned long rgb = 0xff0000;
string s = "#ff00ff";
s.erase(0,1);
int num = stoi(s, 0, 16);

cout << rgb << endl;
cout << "num: " << num << endl;
rgb = num;
red = rgb >> 16;

green = (rgb & 0x00ff00) >> 8;

blue = (rgb & 0x0000ff);

rgb = 0;
rgb |= red <<16;
rgb |= blue <<8;
rgb |=green;
cout << "red: " << red << "green " << green<< "blue: " << blue<<  endl;



}