View Code of Problem 24

    #include<stdio.h>
    #include<math.h>
    int main(){
      int a,b,c;
      float s,p;
      while(scanf("%d %d %d",&a,&b,&c)!=EOF){
        p=(a+b+c)/2.0;
        s=sqrt(p*(p-a)*(p-b)*(p-c));
        printf("%.2f\n",s);
      }
    }