View Code of Problem 24

#include<stdio.h>
#include<math.h>
int main(){
	int a,b,c;
	float p,area;
	while(scanf("%d%d%d",&a,&b,&c)!=EOF){
	
		p=(a+b+c)/2.0;
		area=sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2f\n",area);
	
	}
	return 0;
}