#include<iostream>
#include<Cmath>
using namespace std;
class Triangle
{
public:
void Setabc(float x, float y, float z);//置三邊的值,注意要能成三角形
void Getabc(float *x, float *y, float *z);//取三邊的值
float Perimeter(void);//計算三角形的周長
float Area(void);//計算並返回三角形的面積
private:
float a,b,c; //三邊爲私有成員數據
};
int main(void)
{
Triangle Tri1; //定義三角形類的一個實例(對象)
Tri1.Setabc(4,5,6); //爲三邊置初值
float x,y,z;
Tri1.Getabc(&x,&y,&z); //將三邊的值爲x,y,z賦值
cout<<"三條邊爲:"<<x<<" "<<y<<" "<<z<<endl;
cout<<"三角形的周長爲:"<< Tri1.Perimeter()<<endl<<"三角形的面積爲:"<< Tri1.Area()<<endl;
return 0;
}
void Triangle::Setabc(float x, float y, float z)
{
a=x;
b=y;
c=z;
}
void Triangle::Getabc(float *x, float *y, float *z)
{
*x=a;
*y=b;
*z=c;
}
float Triangle::Perimeter(void)
{
return a+b+c;
}
float Triangle::Area(void)
{
float p=(a+b+c)/2;
return sqrt(p*(p-a)*(p-b)*(p-c));
}