C++語言_以類別為藍圖建立物件程式碼

#include <iostream>
#include <string>
#include <cstdlib>

using std::cout;
using std::string;

class Boy {
public:

    Boy() {
        cout << "Boy constructor one\n";
    }

    Boy(int n) {
        cout << "Boy constructor two, n = " << n << "\n";
    }

    void hello(string name) {
        cout << name << " say hello method.\n";
    }
};

int main(int argc, char *argv[]) {
    system("color f0");

    Boy boy1;
    boy1.hello("boy1");
    cout << "\n";

    Boy boy2(5);
    boy2.hello("boy2");
    cout << "\n";

    Boy *boy3 = new Boy;
    boy3->hello("boy3");
    cout << "\n";

    Boy *boy4 = new Boy();
    boy4->hello("boy4");
    cout << "\n";

    Boy *boy5 = new Boy(16);
    boy5->hello("boy5");
    cout << "\n";

    Boy *boy6 = NULL;
    boy6 = new Boy(20);
    boy6->hello("boy6");
    cout << "\n";

    cout << "\n";
    system("pause");
    return 0;
}