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...
		cuboid(int x,int y,int z):rectangle(x,y)
		{
			height=z;
		}

		int area()
		{
			return height * (getlength() + getwidth()) * 2 + rectangle::area() * 2;
		}


		
};
int main(){
	int x,y,z;
	cin>>x>>y>>z;
	cuboid a(x,y,z);
	cout<<a.rectangle::area()<<'\n'<<a.area();
	return 0;
}