项目3

#include<iostream>
using namespace std;
class Bulk{
private:
	double length;
	double width;
    double heigth;
public:
	Bulk(double len=1.0,double w=1.0,double h=1.0):heigth(h),width(w),length(len){};
	void get_side(double,double,double);
    double area();
     double volume();

};
 int main()
 {  
	 double len,w,h;
	Bulk b[5]={Bulk(2.3,4.5,6.7),Bulk(1.5,3.4),Bulk(10.5)};
	cout<<"请先输入第五个的长宽高"<<endl;
	cin>>len>>w>>h;
	b[4].get_side(len,w,h);
	cout<<"五个长方柱的面积"<<endl;
	cout<<b[0].area()<<endl;
	cout<<b[1].area()<<endl;
	cout<<b[2].area()<<endl;
	cout<<b[3].area()<<endl;
	cout<<b[4].area()<<endl;
	cout<<"五个长方柱的体积"<<endl;
	cout<<b[0].volume()<<endl;
	cout<<b[1].volume()<<endl;
	cout<<b[2].volume()<<endl;
	cout<<b[3].volume()<<endl;
	cout<<b[4].volume()<<endl;
	return 0;
}
 double Bulk::area(){
 return (length*width+length*heigth+width*heigth)*2; 
 }
 double Bulk::volume(){
  return length*width*heigth; 
 
}
void Bulk::get_side(double x,double y,double z){
	
	length=x;
	width=y;
	heigth=z;
	}

运行结果：