C# question regarding mathematical operator input

[Madmartigan]

Hi

Operating system is WinXP using SharpDevelop version 1.1.0 and build 2124.

I'm new to C# and have a problem trying to get a user to enter 3 mathematical operators of choice, then 2 numbers of choice, and giving ouput for each of the mathematical operations using the 2 numbers.

The general script will work but I have a user inputting a string which I don't know how to convert to int to be capable of using it in mathematical operations.

Any advice would be appreciated.

Thanks

M

using System;
public class MathOperators
{
    public static void Main()
    {
        MathOperators MO = new MathOperators();
        MO.ShowDemo(); 
  }
  void ShowDemo() 
  {
      // ask the user to choose their mathematical operator
      Console.Write("Please choose your preferred mathematical operator : *, - or +? ");
 
      // declare a string that will take the input parameter
 
      string choice = Console.ReadLine();
 
 
      Console.WriteLine("please enter a number : ");
                    int num1 = Console.ReadLine();
 
                    Console.WriteLine("please enter another number : ");
                    int num2 = Console.ReadLine();
 
      // Apply the ToLower method to convert all casing to lower casing before entering the loop in case 
      // the user enters capatilized letters or words. I don't know how to get ToLower() to work
 
      choice.ToLower();
 
      switch (choice)
                {
          case "*":                                
              Console.WriteLine("The product of your numbers is : " + (num1 * num2));
              break;
          case "-":
              Console.WriteLine("The value of subtracting the first number from the second is : " + (num1 - num2));
              break;
          case "+":
              Console.WriteLine("The sum of the 2 values is : " + (num1 + num2));
              break;
          default:
              Console.WriteLine("Que??");
              break;
              }  
        }
}

[todashah]

Hello !
Replace your code: int num1 = Console.ReadLin e();
with int num1=Int.Parse( Console.ReadLin e());.
Same for int num2. It is convert give string into number....

Hi

Operating system is WinXP using SharpDevelop version 1.1.0 and build 2124.

I'm new to C# and have a problem trying to get a user to enter 3 mathematical operators of choice, then 2 numbers of choice, and giving ouput for each of the mathematical operations using the 2 numbers.

The general script will work but I have a user inputting a string which I don't know how to convert to int to be capable of using it in mathematical operations.

Any advice would be appreciated.

Thanks

M

using System;
public class MathOperators
{
    public static void Main()
    {
        MathOperators MO = new MathOperators();
        MO.ShowDemo(); 
  }
  void ShowDemo() 
  {
      // ask the user to choose their mathematical operator
      Console.Write("Please choose your preferred mathematical operator : *, - or +? ");
 
      // declare a string that will take the input parameter
 
      string choice = Console.ReadLine();
 
 
      Console.WriteLine("please enter a number : ");
                    int num1 = Console.ReadLine();
 
                    Console.WriteLine("please enter another number : ");
                    int num2 = Console.ReadLine();
 
      // Apply the ToLower method to convert all casing to lower casing before entering the loop in case 
      // the user enters capatilized letters or words. I don't know how to get ToLower() to work
 
      choice.ToLower();
 
      switch (choice)
                {
          case "*":                                
              Console.WriteLine("The product of your numbers is : " + (num1 * num2));
              break;
          case "-":
              Console.WriteLine("The value of subtracting the first number from the second is : " + (num1 - num2));
              break;
          case "+":
              Console.WriteLine("The sum of the 2 values is : " + (num1 + num2));
              break;
          default:
              Console.WriteLine("Que??");
              break;
              }  
        }
}

[Madmartigan]

Hello !
Replace your code: int num1 = Console.ReadLin e();
with int num1=Int.Parse( Console.ReadLin e());.
Same for int num2. It is convert give string into number....

Thanks todashah, works a treat! Much appreciated

M