程序哪有问题饿？
#include<iostream.h>
#include<math.h>
struct Tangle
{ public: double a,b,c;
double area()
{double s,ar;
s=(a+b+c)/2;
ar=sqrt((s-a)*(s-b)*(s-c));
return ar;
}
}
void main()
{ Tangle t;
cout<<endl<<"a=";
cin>>t.a;
cout<<endl<<"b=";
cin>>t.b;
cout<<endl<<"c=";
cin>>t.c;
cout<<"The Area is "<<t.area.ar;
}
