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Arithmetic Operations with Error Codes in C#

This C# program calculates basic arithmetic operations, such as sum, subtraction, multiplication, or division, based on the command line parameters provided by the user. The program will analyze the three parameters: a number, an operator (either +, -, *, or x), and another number. It will then perform the corresponding arithmetic operation and display the result. The program returns specific error codes for invalid inputs:
- Error code 1 if the number of parameters is not 3
- Error code 2 if the second parameter is not a valid operator
- Error code 3 if the first or third parameter is not a valid number
- Error code 0 if the operation completes successfully



Group

Functions in C#

Objective

1. Create a C# program that reads command line arguments.
2. The first argument should be a number, the second should be an arithmetic operator (+, -, *, or x), and the third should be another number.
3. Perform the arithmetic operation based on the operator and display the result.
4. Return specific error codes:
- Return error code 1 if the number of parameters is not 3
- Return error code 2 if the operator is invalid
- Return error code 3 if the numbers are invalid
- Return error code 0 if everything is valid

Write a C# program to calculate a sum, subtraction, product or division, analyzing the command line parameters:

calc 5 + 379

(Parameters must be a number, a sign, and another number; allowed signs are + - * x / )

This version must return the following error codes:
1 if the number of parameters is not 3
2 if the second parameter is not an accepted sign
3 if the first or third parameter is not a valid number
0 otherwise

Example C# Exercise

 Copy C# Code 
using System;

class Program
{
    // Main method to process command line arguments
    static void Main(string[] args)
    {
        // Check if exactly three arguments are provided
        if (args.Length != 3)
        {
            Console.WriteLine("Error Code: 1");
            return;
        }

        // Parse the first and third arguments as numbers
        double num1, num2;
        bool isNum1Valid = double.TryParse(args[0], out num1);
        bool isNum2Valid = double.TryParse(args[2], out num2);

        // Check if both numbers are valid
        if (!isNum1Valid || !isNum2Valid)
        {
            Console.WriteLine("Error Code: 3");
            return;
        }

        // Extract the operator (second argument)
        string operatorSymbol = args[1];

        // Perform the operation based on the operator
        switch (operatorSymbol)
        {
            case "+":
                Console.WriteLine(num1 + num2);
                break;
            case "-":
                Console.WriteLine(num1 - num2);
                break;
            case "*":
            case "x":
                Console.WriteLine(num1 * num2);
                break;
            case "/":
                if (num2 == 0)
                {
                    Console.WriteLine("Error Code: 3 (Division by zero)");
                }
                else
                {
                    Console.WriteLine(num1 / num2);
                }
                break;
            default:
                Console.WriteLine("Error Code: 2");
                break;
        }
    }
}

 Output

If the input is:

calc 5 + 379

The output will be: 384

If the input is invalid (e.g., invalid number or operator), the corresponding error code will be displayed:
Error Code: 1

(If the number of parameters is not 3)
Error Code: 2

(If the operator is invalid)
Error Code: 3

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