题解 | #求长方体表面积#

#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 getlength(){
			return length;
		}
		int getwidth(){
			return width;
		}
		int area(){
			return length*width;
		}
};
class cuboid:public rectangle{
	private:
		int height;
	public:
		// write your code here...
		//子类的构造函数继承与父类的构造函数，写法：子类名（子类属性）：父类名（父类属性）{额外属性定义}
    cuboid(int x, int y, int z):rectangle(x,y){
        this->height = z;
    }
    //计算表面积的函数
    int area(){//注意不能用this->area()，否则调用的是这个函数，要用this->rectangle::area()，明确是父类中的area()函数
        return (this->rectangle::area()+this->height*this->getlength()+this->height*this->getwidth())*2;//循环调用area
    }
};
int main(){
	int x,y,z;
	cin>>x>>y>>z;
	cuboid a(x,y,z);
	cout<<a.rectangle::area()<<'\n'<<a.area();
	return 0;
}