View Code of Problem 24

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

	return 0;
}