View Code of Problem 24

#include <stdio.h>
#include <math.h>
int main(){
	int a,b,c;
	while(scanf("%d %d %d",&a,&b,&c)!=EOF){
		float p,S;
		p=(a+b+c)/2.0;
		S=sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2f\n",S);
	}
}