public static double DoCalculation(string[] args)
{
Calculations calc = new Calculations();
if (args[0] == "Add")
{
double a = double.Parse(args[1]);
double b = double.Parse(args[2]);
return(calc.Add(a, b));
}
return(0);
}
private void adding_Click(object sender, EventArgs e)
{
number1.Text = Calculations.RemoveWhiteCahracters(number1.Text);
number2.Text = Calculations.RemoveWhiteCahracters(number2.Text);
if (!Calculations.IsItNumber(number1.Text))
{
MessageBox.Show("Number 1 is not really a number.\nYou can use digits, one comma and one minus at the front.");
return;
}
if (!Calculations.IsItNumber(number2.Text))
{
MessageBox.Show("Number 2 is not really a number.\nYou can use digits, one comma and one minus at the front.");
return;
}
result.Text = Calculations.Add(number1.Text, number2.Text);
}
static void Main(string[] args)
{
Console.WriteLine("Calculator App");
for (; ;)
{
Console.WriteLine();
Console.WriteLine("Select an operator");
Console.WriteLine("1. Add");
Console.WriteLine("2. Subtract");
Console.WriteLine("3. Multiply");
Console.WriteLine("4. Divide");
Console.WriteLine("5. Square Root");
Console.WriteLine("6. Power");
Console.WriteLine("7. Exit");
Console.Write("Operator: ");
string response = Console.ReadLine();
if (Int32.TryParse(response, out int selection))
{
double answer = -1;
Calculations calculations = new Calculations();
switch (selection)
{
case 1:
answer = calculations.Add();
break;
case 2:
answer = calculations.Subtract();
break;
case 3:
answer = calculations.Multiply();
break;
case 4:
answer = calculations.Divide();
break;
case 5:
answer = calculations.Square();
break;
case 6:
answer = calculations.Power();
break;
case 7:
Console.WriteLine("Thanks for using! Goodbye!");
Console.ReadLine();
Environment.Exit(0);
break;
default:
Console.WriteLine("Invalid Entry");
break;
}
Console.WriteLine($"The answer is {answer}");
}
else
{
Console.WriteLine("Invalid Entry");
}
}
}
static void Main(string[] args)
{
Console.Title = "Console calculator";
Console.WriteLine("This is an arithmetic claculator for console commands");
Console.WriteLine("Type 'HELP' to get the list of commands available");
Console.WriteLine("Type 'START' to start the calculation");
Console.WriteLine("To exit at any time type 'EXIT' command");
string cmd;
do
{
Console.Write(":>");
cmd = Console.ReadLine().ToUpper(); //make input as case insensitive
switch (cmd)
{
case "HELP": //help command case here
PrintAvailableCommands();
break;
case "EXIT": //exit command case here
Environment.Exit(0);
break;
case "START": //start command case here
{
MathematicalDataContainer data = GetUserInput(); // get user input
if (data.CorrrectInput)
{
if (data.MathOperation == "ADD")
{
data.Result = Calculations.Add(data.FirstNumber, data.SecondNumber);
}
else if (data.MathOperation == "SUB")
{
data.Result = Calculations.Subtract(data.FirstNumber, data.SecondNumber);
}
else if (data.MathOperation == "MUL")
{
data.Result = Calculations.Multiply(data.FirstNumber, data.SecondNumber);
}
else if (data.MathOperation == "DIV")
{
if (data.SecondNumber == 0)
{
PrintErrorMessage("Division by zero is not allowed!!");
break;
}
else
{
data.Result = Calculations.Divide(data.FirstNumber, data.SecondNumber);
}
}
Console.WriteLine($"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
}
