View Code of Problem 24

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

int main(){
	double a,b,c;
	scanf("%lf %lf %lf",&a,&b,&c);
	double s;
	double p;
	p = (a+b+c)/2;
	
	s = sqrt(p*(p-a)*(p-b)*(p-c));
	printf("%.2lf",s);
	return 0;
}