View Code of Problem 24

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

int main(){
	int a,b,c;
	scanf("%d %d %d",&a,&b,&c);
	double s;
	double p;
	p = 1.0*(a+b+c)/2;
	if(a+b>c&&a+c>b&&b+c>a){
			s = sqrt(p*(p-a)*(p-b)*(p-c));
	printf("%.2lf",s);	
	}

	return 0;
}