1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | class Program{ public class Tochka { public double x, y; // два конструктора public Tochka() { } public Tochka(double x, double y) { this.x = x; this.y = y; } } static double Distance(Tochka p1, Tochka p2) { return Math.Sqrt(Math.Pow(p2.x - p1.x, 2) + Math.Pow(p2.y - p1.y, 2)); } static double Surface(Tochka p1, Tochka p2, Tochka p3) { double a = Distance(p1, p2); double b = Distance(p2, p3); double c = Distance(p1, p3); double p = (a + b + c) / 2; return Math.Sqrt(p * (p - a) * (p - b) * (p - c)); } static void Main(string[] args) { Tochka p1 = new Tochka(); Console.Write("p1.x = "); p1.x = Convert.ToDouble(Console.ReadLine()); Console.Write("p1.y = "); p1.y = Convert.ToDouble(Console.ReadLine()); Tochka p2 = new Tochka(); Console.Write("p2.x = "); p2.x = Convert.ToDouble(Console.ReadLine()); Console.Write("p2.y = "); p2.y = Convert.ToDouble(Console.ReadLine()); Tochka p3 = new Tochka(); Console.Write("p3.x = "); p3.x = Convert.ToDouble(Console.ReadLine()); Console.Write("p3.y = "); p3.y = Convert.ToDouble(Console.ReadLine()); Console.WriteLine("S = {0}", Surface(p1, p2, p3)); Console.ReadKey(); }} |