View Code of Problem 24

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

int main() {
	int a,b,c;
	double s,p;
	while(scanf("%d %d %d",&a,&b,&c)!=EOF){
		p=(a+b+c)/2.0;
		s=sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2lf\n",s);
	}
}