View Code of Problem 24

#include <iostream>
#include <math.h>
using namespace std;

int main(){
  int a,b,c;
  double p,s;
  while(scanf("%d%d%d",&a,&b,&c)!=EOF){
    p = (a+b+c)/2;
    s = sqrt(p*(p-a)*(p-b)*(p-c));
    printf("%.2lf\n",s);
  }
}