View Code of Problem 24

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

int main(){
	float p,a,b,c,s;

	scanf("%f %f %f",&a,&b,&c);
	p=(a+b+c)/2;
	s=sqrt(p*(p-a)*(p-b)*(p-c));
	printf("%.2f\n",s);
	return 0;
}