View Code of Problem 24

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