Submission #111228

---

Source Code Expand

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;

double sideLength(double xn, double yn, double xm, double ym)
{
	return sqrt(pow((xm - xn), 2.0) + pow((ym - yn), 2.0));
}

double heronArea(double sidep, double sideq, double sider)
{
	double halfPerim = (sidep + sideq + sider) / 2.0;
	return sqrt(halfPerim * (halfPerim - sidep) * (halfPerim - sideq) * (halfPerim - sider));
}

int main()
{
	double x1, y1, x2, y2, x3, y3;
	double side1, side2, side3;
	cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
	side1 = sideLength(x1, y1, x2, y2);
	side2 = sideLength(x2, y2, x3, y3);
	side3 = sideLength(x3, y3, x1, y1);
	cout << fixed << setprecision(1);
	cout << heronArea(side1, side2, side3) << endl;
	return 0;
}

Submission Info

Judge Result