第五周 三角形类 成员函数的实现



#include <iostream>
using namespace std;
class triange
{
public:
    void set(double ah,double bh,double ch);
    double zhouchang();
    double area();
private:
    int a,b,c;
};
void triange::set(double ah,double bh,double ch)
{
    a=ah;
    b=bh;
    c=ch;
}
double triange::zhouchang()
{
    double d;
    d=a+b+c;
    cout<<d<<endl;
    return 0;
}
double triange::area()
{
    double p;
    p=(a+b+c)/2;
    double s;
    s=p*(p-a)*(p-b)*(p-c);
    cout<<s;
    return 0;
}
int main()
{
    triange f;
    f.set(3,4,5);
    cout<<"三角形的周长"<<f.zhouchang()<<'\t'<<"三角形的面积"<<f.area()<<endl;
    return 0;
}