View Code of Problem 24

    #include<stdio.h>
    #include<math.h>
    int main()
    {
     int a,b,c;
      double s;
      while(scanf("%d %d %d",&a,&b,&c)!=EOF)
      {
      s=sqrt((a+b+c)*(a+b-c)*(a+c-b)*(b+c-a))/4;
      printf("%.2f\n",s);
      }
      return 0;
      
    }