View Code of Problem 24

#include<stdio.h>
#include<math.h>
int main(){
	int a, b, c;
	double p = 0;
	scanf("%d %d %d", &a, &b, &c);
	p = (a+b+c)/2.0;
	double s = 0, k = 0;
	k = p*(p-a)*(p-b)*(p-c);
	s = sqrt(k);
	printf("%.2f", s);
	return 0;
}