题解 | #构建长方体类#

#include<bits/stdc++.h>
using namespace std;
class rectangle {
  private:
    int length, width;
  public:
    rectangle(int x, int y) {
        length = x;
        width = y;
    }
    void set(int x, int y) {
        length = x;
        width = y;
    }
    int area() {
        return length * width;
    }
};
class cuboid: public rectangle {
  private:
    int height;
  public:
    // write your code here...
    //关键在于继承基类的属性
    //构造函数继承基类
    cuboid(int x,int y, int z):rectangle(x,y){
        this->height = z;
    }
    //定义求体积的方法
    int getvolume(){
        return this->area()*this->height;
    }

};
int main() {
    int x, y, z;
    cin >> x >> y >> z;
    cuboid a(x, y, z);
    cout << a.getvolume();
    return 0;
}