第三周【项目2-三角形类2】

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//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;}

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