三角形问题（2）

/*
*copyright(c) 2014,烟台大学计算机学院
*All rights reserved
*文件名称：test.cpp
*作者：杨昊
*版本：v6.0
*时间；2016年4月7日

*
*问题描述：三角形问题

*输入描述：无
*程序输出：
*/

#include<iostream>
using namespace std;
class Triangle
{
public:
void setA(double x);
void setB(double y);
void setC(double z);
double getA();
double getB();
double getC();

bool isTriangle();
double perimeter();
double area();
private:
double a,b,c;
};

void Triangle ::setA(double x)
{
a=x;
}
void Triangle ::setB(double y)
{
b=y;
}
void Triangle ::setC(double z)
{
c=z;
}
bool Triangle::isTriangle()
{
if((a+b>c)&&(a+c>b)&&(b+c>a))
return true;
else
return false;
}
double Triangle ::getA()
{
return a;
}
double Triangle ::getB()
{
return b;
}
double Triangle ::getC()
{
return c;
}
double Triangle::perimeter()
{
return a+b+c;
}

double Triangle::area()
{
return 0.5*(a+b+c);
}
int main()
{
Triangle tri1;
double x,y,z;
cin>>x>>y>>z;
tri1.setA(x);
tri1.setB(y);
tri1.setC(z);
if(tri1.isTriangle())
{
cout<<tri1.getA()<<tri1.getB()<<tri1.getC()<<endl;
cout<<tri1.perimeter()<<" "<<tri1.area()<<endl;
}
else
cout<<"不能组成"<<endl;
}