View Code of Problem 24

#include <iostream>
#include <cmath>
using namespace std;
int main(){
	double a,b,c;
	while(cin>>a>>b>>c){
		double q = (a+b+c)/2;
		double mianji = sqrt(q*(q-a)*(q-b)*(q-c));
		printf("%.2f\n",mianji);
	}
	
}