1 #include <iostream>
2 #include <cmath>
3 /* run this program using the console pauser or add your own getch, system("pause") or input loop */
4 using namespace std;
5 int main(int argc, char** argv) {
6 double triangle(double,double,double);
7 double a,b,c;
8 cin >>a>>b>>c;
9 while(a>0&&b>0&&c>0)
10 {
11 cout<<triangle(a,b,c)<<endl;
12 cin>>a>>b>>c;
13 }
14 return 0;
15 }
16
17 double triangle(double a,double b,double c)
18 {
19 double area;
20 double s=(a+b+c)/2;
21 area=sqrt(s*(s-a)*(s-b)*(s-c));
22 return area;
23 }
