View Code of Problem 24

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