lmarkov

Show Sign Of Product Of Real Numbers

Dec 4th, 2012
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C# 2.28 KB | None | 0 0
  1. /*
  2.  * Write a program that shows the sign (+ or -) of the product of three real numbers without calculating it. Use a sequence of if statements.
  3. */
  4.  
  5. using System;
  6.  
  7. class ShowSignOfProductOfRealNumbers
  8. {
  9.     static void Main()
  10.     {
  11.         double number1, number2, number3;
  12.         int check = 0;
  13.  
  14.         string invalidInput = "Please enter a value between " + double.MinValue + " and " + double.MaxValue + Environment.NewLine;
  15.  
  16.         Console.WriteLine("Enter value of number1: ");
  17.         while (!(double.TryParse(Console.ReadLine(), out number1) && number1 >= double.MinValue && number1 <= double.MaxValue))
  18.         {
  19.             Console.WriteLine(invalidInput);
  20.             Console.WriteLine("Enter value of number1: ");
  21.         }
  22.         Console.WriteLine("Enter value of number2: ");
  23.         while (!(double.TryParse(Console.ReadLine(), out number2) && number2 >= double.MinValue && number2 <= double.MaxValue))
  24.         {
  25.             Console.WriteLine(invalidInput);
  26.             Console.WriteLine("Enter value of number2: ");
  27.         }
  28.         Console.WriteLine("Enter value of number3: ");
  29.         while (!(double.TryParse(Console.ReadLine(), out number3) && number3 >= double.MinValue && number3 <= double.MaxValue))
  30.         {
  31.             Console.WriteLine(invalidInput);
  32.             Console.WriteLine("Enter value of number3: ");
  33.         }
  34.  
  35.         if (number1 != 0 && number2 != 0 && number3 != 0)
  36.         {
  37.             if (number1 < 0)
  38.             {
  39.                 check = check + 1;
  40.             }
  41.             if (number2 < 0)
  42.             {
  43.                 check = check + 1;
  44.             }
  45.             if (number3 < 0)
  46.             {
  47.                 check = check + 1;
  48.             }
  49.  
  50.             if (check == 1 || check == 3)
  51.             {
  52.                 Console.WriteLine("The sign of the product of numbers is: -" + Environment.NewLine);
  53.                 Main();
  54.             }
  55.             else
  56.             {
  57.                 Console.WriteLine("The sign of the product of numbers is: +" + Environment.NewLine);
  58.                 Main();
  59.             }            
  60.         }
  61.         else
  62.         {
  63.             Console.WriteLine("There isn't sign of the product because it is: 0" + Environment.NewLine);
  64.             Main();
  65.         }              
  66.     }
  67. }
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