程序代码：

#include<iostream>
#include<math.h>
using namespace std;

class Triangle
{
    private: 
    float a,b,c;
    public:
    Triangle()
    {
       cout<<"输入三角形三边"<<endl;   
    }
    ~Triangle()
    {
       cout<<"over"<<endl;   
    }
    void getabc();
    int judge();
    float ZC();
    float MJ();
    float LX();
}s1;
void Triangle ::getabc()
{
    cin>>a;
    cin>>b;
    cin>>c;
}
int Triangle::judge()
{
    if(a+b>c&&a-b<c&&a!=0&&b!=0&&c!=0)
    return 1;
    else
    return 0;
}
float Triangle::ZC()
{
    return a+b+c;
}
float Triangle::MJ()
{
    float area,p;
    p=ZC()/2;
    area=sqrt((p-a)*(p-b)*(p-c)*p);
    return area;
}
float Triangle:: LX()
{
    if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a)
    cout<<"直角三角形"<<endl;
    else if(a*a+b*b<c*c||a*a+c*c<b*b||b*b+c*c<a*a)
    cout<<"钝角三角形"<<endl;
    else
    cout<<"锐角三角形"<<endl;
}

int main()

 {

     s1.getabc();
     if(s1.judge()==0)
     cout<<"不是三角形"<<endl;
     else{
        
         cout<<s1.ZC()<<endl;
         cout<<s1.MJ()<<endl;
         cout<<s1.LX()<<endl;
        
          } 


 }