View Code of Problem 24

# include<stdio.h>
# include<math.h>
int main(void)
{
  double a,b,c,p,s;
  while(scanf("%lf %lf %lf",&a,&b,&c)!=EOF)
  {
    p = (a + b + c)/2;
    s = sqrt(p*(p-a)*(p-b)*(p-c));
    printf("%.2lf\n",s);
  }
  return 0;
}