第三周【项目2-三角形类2】

港控/mmm° 2022-08-07 07:59 209阅读 0赞

//第三周【项目2-三角形类2】
    #include <iostream>
    #include <cmath>
    using namespace std;
    class Triangle
    {
    public:
        inline void setA(double x)
        {
            a=x;
        }
        inline void setB(double y)
        {
            b=y;
        }
        inline void setC(double z)
        {
            c=z;
        }
        inline double getA()
        {
            return a;
        }
        inline  double getB()
        {
            return b;
        }
        inline double getC()
        {
            return c;
        }
        bool isTriangle();
        double perimeter();
        double area();
    private:
        double a,b,c;
    };
    bool Triangle::isTriangle()
    {
        bool isTriangle=false;
        if(a+b>c)
        {
            if(b+c>a)
            {
                if(c+a>b)
                {
                    isTriangle=true;
                }
            }
        }
        return isTriangle;
    }
    double Triangle::perimeter()
    {
        return a+b+c;
    }
    double Triangle::area()
    {
        double area,p;
        p=(a+b+c)/2;
        area=sqrt(p*(p-a)*(p-b)*(p-c));
        return area;
    }
    int main()
    {
        Triangle tri1;
        double x,y,z;
        cout << "请输入三角形的三条边：";
        cin>>x>>y>>z;
        tri1.setA(x);
        tri1.setB(y);
        tri1.setC(z);
        if(tri1.isTriangle())
        {
            cout << "三条边为："<<tri1.getA()<<','<<tri1.getB()<<','<<tri1.getC()<<endl;
            cout << "三角形的周长为："<<tri1.perimeter()<<'\t'<<"面积为："<<tri1.area()<< endl;
        }
        else
            cout<<"不能构成三角形"<<endl;
        return 0;
    }

运行结果：

![Center][]

[Center]: /images/20220805/c6679027692c4558a33e8ac047da1445.png