נושא: שפת C#- יצירת תוכנה שמחשבת את משפט פיתגור

using System;
using System.Collections.Generic;
using System.Text;
class PythagoreanTheo
{
static void Main(string[] args)
{
double a, b, c, r1, r2, r3;
char ch1;
Console.WriteLine("Enter the property you want to check:");
ch1 = char.Parse(Console.ReadLine());
r1 = Math.Sqrt(Math.Pow(a, 2) + Math.Pow(b, 2));
r2 = Math.Sqrt(Math.Pow(c, 2) - Math.Pow(a, 2));
r3 = Math.Sqrt(Math.Pow(c, 2) - Math.Pow(b, 2));
Console.WriteLine();
if (ch1 == 'c')
{
Console.WriteLine("Enter b and a");
b = double.Parse(Console.ReadLine());
a = double.Parse(Console.ReadLine());
Console.WriteLine("C is: " + r1);
}
else if (ch1 == 'b')
{
Console.WriteLine("Enter c and a");
c = double.Parse(Console.ReadLine());
a = double.Parse(Console.ReadLine());
Console.WriteLine("B is: " + r2);
}
else
{
Console.WriteLine("Enter c and b");
c = double.Parse(Console.ReadLine());
b = double.Parse(Console.ReadLine());
Console.WriteLine("A is: " + r3);
}
}
}