View Code of Problem 24

#include<stdio.h>
#include<math.h>
main()
{
	double  a,b,c;
	double  p,S;
	scanf("%lf%lf%lf",&a,&b,&c);
	p=(a+b+c)/2;
	S=sqrt(p*(p-a)*(p-b)*(p-c));
	printf("%.2lf",S);
}