cómo hacer una calculadora en c # visual studio 2019 código de ejemplo

Ejemplo: calculadora de c #

usingSystem;namespaceCalculatorclassCalculatorpublicstaticdoubleDoOperation(double num1,double num2,string op)double result =double.NaN;// Default value is "not-a-number" which we use if an operation, such as division, could result in an error.// Use a switch statement to do the math.switch(op)case"a":
                    result = num1 + num2;break;case"s":
                    result = num1 - num2;break;case"m":
                    result = num1 * num2;break;case"d":// Ask the user to enter a non-zero divisor.if(num2 !=0)
                        result = num1 / num2;break;// Return text for an incorrect option entry.default:break;return result;classProgramstaticvoidMain(string[] args)bool endApp =false;// Display title as the C# console calculator app.
            Console.WriteLine("Console Calculator in C#r");
            Console.WriteLine("------------------------n");while(!endApp)// Declare variables and set to empty.string numInput1 ="";string numInput2 ="";double result =0;// Ask the user to type the first number.
                Console.Write("Type a number, and then press Enter: ");
                numInput1 = Console.ReadLine();double cleanNum1 =0;while(!double.TryParse(numInput1,out cleanNum1))
                    Console.Write("This is not valid input. Please enter an integer value: ");
                    numInput1 = Console.ReadLine();// Ask the user to type the second number.
                Console.Write("Type another number, and then press Enter: ");
                numInput2 = Console.ReadLine();double cleanNum2 =0;while(!double.TryParse(numInput2,out cleanNum2))
                    Console.Write("This is not valid input. Please enter an integer value: ");
                    numInput2 = Console.ReadLine();// Ask the user to choose an operator.
                Console.WriteLine("Choose an operator from the following list:");
                Console.WriteLine("ta - Add");
                Console.WriteLine("ts - Subtract");
                Console.WriteLine("tm - Multiply");
                Console.WriteLine("td - Divide");
                Console.Write("Your option? ");string op = Console.ReadLine();try
                    result = Calculator.DoOperation(cleanNum1, cleanNum2, op);if(double.IsNaN(result))
                        Console.WriteLine("This operation will result in a mathematical error.n");else Console.WriteLine("Your result: 0:0.##n", result);catch(Exception e)
                    Console.WriteLine("Oh no! An exception occurred trying to do the math.n - Details: "+ e.Message);

                Console.WriteLine("------------------------n");// Wait for the user to respond before closing.
                Console.Write("Press 'n' and Enter to close the app, or press any other key and Enter to continue: ");if(Console.ReadLine()=="n") endApp =true;

                Console.WriteLine("n");// Friendly linespacing.return;

Si para ti ha resultado de ayuda este artículo, sería de mucha ayuda si lo compartes con más entusiastas de la programación así contrubuyes a difundir esta información.

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