View Code of Problem 24

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

int main()
{ 
	float a,b,c;
	float p,S;
	scanf ("%f %f %f",&a,&b,&c);
	p=(a+b+c)/2;
	S=(float)sqrt(p*(p-a)*(p-b)*(p-c));     

	printf("%.2f",S);
	return 0;
}