View Code of Problem 24

#include<stdio.h>
int main(){
	int a,b,c;
  	double s=0,p=0;
  while(scanf("%d %d %d",&a,&b,&c)!=EOF){
  	p=(a+b+c)/2.00;
    	s=sqrt(p*(p-a)*(p-b)*(p-c));
    	printf("%.2lf\n",s);
  }
}