View Code of Problem 24

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