Calculator - if Learn programming C#



Lesson:

Basic Data Types

Exercise:

Calculator - if


Objetive:

Write a C# program that asks the user for two numbers and an operation to perform on them (+,-,*,x,/) and displays the result of that operation, as in this example:

Enter the first number: 5
Enter operation: +
Enter the second number: 7
5+7=12

Note: You MUST use "if", not "switch"


Code:

using System;
public class exercise53
{
    public static void Main()
    {
        int a, b;
        char operation;

        Console.Write("Enter first number: ");
        a = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter operation: ");
        operation = Convert.ToChar(Console.ReadLine());
        Console.Write("Enter second number: ");
        b = Convert.ToInt32(Console.ReadLine());

        if (operation == '+')
            Console.WriteLine("{0} + {1} = {2}", a, b, a + b);
        else if (operation == '-')
            Console.WriteLine("{0} - {1} = {2}", a, b, a - b);
        else if ((operation == 'x') || (operation == '*'))
            Console.WriteLine("{0} * {1} = {2}", a, b, a * b);
        else if (operation == '/')
            Console.WriteLine("{0} / {1} = {2}", a, b, a / b);
        else
            Console.WriteLine("Wrong Character");
    }
}