😄C++ -- 类的继承

类的继承

#include <iostream>

using namespace std;

// 基类
class Shape {

public:
    void setWidth(int w) {
        width = w;
    }

    void setHeight(int h) {
        height = h;
    }

protected:
    int width;
    int height;
};

// 派生类
class Rectangle : public Shape {
public:
    int getArea() {
        return (width * height);
    }
};

int main(void) {
    Rectangle Rect;
    Rect.setWidth(5);
    Rect.setHeight(7);

    // 输出对象的面积
    cout << "Total area:" << Rect.getArea() << endl;

    system("pause");
    return 0;
}

结果：