Esempio n. 1
0
        private static MathematicalDataContainer GetUserInput()
        {
            MathematicalDataContainer data = new MathematicalDataContainer();

            Console.WriteLine("Enter the first number:");
            Console.Write(":>");
            string n1 = Console.ReadLine();                     //input for the 1st number

            Console.WriteLine("Choose maths operation.");
            Console.Write(":>");
            string operation = Console.ReadLine().ToUpper();    //input for the maths operation

            Console.WriteLine("Enter the second number:");
            Console.Write(":>");
            string n2 = Console.ReadLine();                                          //input for the 2nd number

            if (IsInputValid(n1) && IsInputValid(n2) && IsOperationValid(operation)) // input validation
            {
                data.FirstNumber   = double.Parse(n1);
                data.SecondNumber  = double.Parse(n2);
                data.MathOperation = operation;
                data.CorrrectInput = true;
            }
            else
            {
                data.CorrrectInput = false;
            }
            return(data);
        }
Esempio n. 2
0
        private static MathematicalDataContainer GetUserInputInLoop()
        {
            MathematicalDataContainer data = new MathematicalDataContainer();
            bool end = false;

            do
            {
                Console.Clear();
                Console.WriteLine("Theoperation will be performed on the following numbers: ");
                foreach (var number in data.Numbers)
                {
                    Console.Write(number + "   ");
                }
                Console.WriteLine("Enter the number to be used in calculations. If you want to perform the operation, type 'END'.");
                Console.Write(":>");
                string n = Console.ReadLine(); //input numbers
                if (n == "end")
                {
                    end = true;
                }
                else
                {
                    if (IsInputValid(n))                            // input validation
                    {
                        data.Numbers.Add(double.Parse(n));
                    }
                    else
                    {
                        data.CorrrectInput = false;
                    }
                }
            } while (end == false);

            Console.WriteLine("Choose maths operation.");
            Console.Write(":>");
            string operation = Console.ReadLine().ToUpper();        //input for the maths operation

            if (data.CorrrectInput && IsOperationValid(operation))  // input validation
            {
                data.MathOperation = operation;
                data.CorrrectInput = true;
            }
            else
            {
                data.CorrrectInput = false;
            }
            return(data);
        }
Esempio n. 3
0
        static void Main(string[] args)
        {
            Console.Title = "Console calculator";
            Console.WriteLine("This is an arithmetic claculator for console commands");
            Console.WriteLine("Type 'HELP' to get the list of commands available");
            Console.WriteLine("Type 'START' to start the calculation");
            Console.WriteLine("To exit at any time type 'EXIT' command");
            string cmd;

            do
            {
                Console.Write(":>");
                cmd = Console.ReadLine().ToUpper();     //make input as case insensitive

                switch (cmd)
                {
                case "HELP":                            //help command case here
                    PrintAvailableCommands();
                    break;

                case "EXIT":                            //exit command case here
                    Environment.Exit(0);
                    break;

                case "START":                                        //start command case here
                {
                    MathematicalDataContainer data = GetUserInput(); // get user input

                    if (data.CorrrectInput)
                    {
                        if (data.MathOperation == "ADD")
                        {
                            data.Result = Calculations.Add(data.FirstNumber, data.SecondNumber);
                        }
                        else if (data.MathOperation == "SUB")
                        {
                            data.Result = Calculations.Subtract(data.FirstNumber, data.SecondNumber);
                        }
                        else if (data.MathOperation == "MUL")
                        {
                            data.Result = Calculations.Multiply(data.FirstNumber, data.SecondNumber);
                        }
                        else if (data.MathOperation == "DIV")
                        {
                            if (data.SecondNumber == 0)
                            {
                                PrintErrorMessage("Division by zero is not allowed!!");
                                break;
                            }
                            else
                            {
                                data.Result = Calculations.Divide(data.FirstNumber, data.SecondNumber);
                            }
                        }
                        Console.WriteLine($"The result of the operation is: {data.Result}.");                // print results of the calculation
                    }
                    else
                    {
                        PrintErrorMessage("Error!! Incorrect input!!");                                   // error message for failed input validation
                    }
                    break;
                }

                case "CLS":                                     //clear screen command case
                    Console.Clear();
                    break;

                default:
                    PrintErrorMessage("Bad command!!");          //default wrong command message
                    break;
                }
            }while (cmd.ToUpper() != "EXIT");    //run the screen till exit command typed
        }