View Code of Problem 24

# include<stdio.h>
# include<math.h>
int main(void)
{
  int a,b,c;
  double s;
  while(scanf("%d %d %d",&a,&b,&c)!=EOF)
  {
    s = (double)0.25*(sqrt ((a+b+c)*(a+b-c)*(a+c-b)*(b+c-a)));
    printf("%0.2lf",s);
  }
  return 0;
}