第五周 项目3 对象数组操作长方柱类

#include <iostream>
#include <Cmath>
using namespace std;
class Triangle
{
public:
Triangle(double n=1.0,double m=1.0,double z=1.0):a(n),b(m),c(z){};
double perimeter();//体积
double area();//面积
void output();
void get_value();
private:
double a,b,c;
};
void Triangle::get_value()
{
cout<<"请分别输入长方体的长宽高"<<endl;
cin>>a>>b>>c;
cout<<"长方体的体积是"<<endl;
cout<<a*b*c<<endl;
cout<<"长方体的面积是"<<endl;
cout<<a*b*2+b*c*2+a*c*2<<endl;
}
double Triangle::perimeter() //体积
{
return a*b*c;
}
double Triangle::area()
{
return a*b*2+b*c*2+a*c*2;
}
void Triangle::output()
{
cout<<"长方体的长宽高分别为："<<a<<' '<<b<<' '<<c<<' '<<endl;
cout<<"该长方体的体积为"<<perimeter()<<"，面积为："<<area()<<endl<<endl;
}
int main()
{
Triangle b[5]={Triangle(2.3,4.5,6.7),Triangle(1.5,3.4),Triangle(10.5)};
b[4].get_value();
b[0].output();
b[1].output();
b[2].output();
b[3].output();//下面分别输出这5个长方柱的体积和表面积
}