/* ovrldcout.cpp by detour@metalshell.com
 *
 * This is a example of how to overload the <<
 * and >> operator in c++.
 *
 * http://www.metalshell.com/
 *
 */
 
#include <string>
#include <iostream>
 
class Beer{
      private:
             char btype[30];
             int supply;
      public:
             Beer() { supply = 6; strcpy(btype, "Bud Light"); }
 
             friend ostream& operator<<(ostream& output, const Beer &b) {
                    output << "Beer: " << b.btype << "\n" << "Supply: "
                           << b.supply << endl;
                    return output;
             }
 
             friend istream& operator>>(istream& input, Beer &b) {
                    cin >> b.supply;
                    return input;
             }
};
 
 
int main() {
    Beer a;
 
    /* This cout will use your overloaded << function */
    cout << a;
 
    cout << "Enter your new supply #: ";
    /* This cin will use your overloaded >> function */
    cin >> a;
    cout << a;
}