T3

#include <iostream>
#include <cmath>
using namespace std;
class Triangle
{
public:
float perimeter();
void cinnum(int,int,int);

float area();
Triangle(int l=10,int w=10,int h=10):length(l),width(w),heigth(h){}
private:
float length;
float width;
float heigth;
};
int main()
{
int i=0,l,w,h;
cout<<"请输入长宽高;"<<endl;
cin>>l>>w>>h;
Triangle Tri[5];
Triangle tri[4]=
{
Triangle(7,8,9),
Triangle(2,3,4),
Triangle(3,4,5),
Triangle(4,5,6)
}
;
Tri[5].cinnum(l,w,h);
for(i=0;i<=5;i++)
{
tri[i].perimeter();
tri[i].area();
}
return 0;
}
float Triangle::perimeter()
{
cout<<"长方形表面积为："<<endl;
cout<< (length*heigth*2+length*width*2+width*heigth*2)<<endl;
return 0;
}
float Triangle::area()
{
float q;
q=(length+heigth+width)/2;
cout<<"长方形体积为："<<endl;
cout<< (sqrt(q*(q-length)*(q-heigth)*(q-width)))<<endl;
return 0;
}
void Triangle::cinnum(int l,int w,int h)
{
length=l;
width=w;
heigth=h;
}