public static void Main()
{
// Calculator
Console.WriteLine("+++++++++++++++++++++++++++");
Console.WriteLine("+++++++ CALCULATOR ++++++++");
Console.WriteLine("+++++++++++++++++++++++++++");
Console.WriteLine("\t+ - Add");
Console.WriteLine("\t- - Subtract");
Console.WriteLine("\t* - Multiply");
Console.WriteLine("\t/ - Divide");
Console.WriteLine("\t% - Modulo");
// We repeat operations until the users enters other that Y or y
bool repeat;
// We create an object from the Class Calculator
// before entering inside the loop
Calculator calculator = new Calculator();
do
{
String firstNumberString;
bool isNumber;
// We loop until the user enters a valid number
// The user is allowed to enter "." for example 34.54
// If the user enters for example 34.54. it is not
// a valid double number, it will be rejected
do
{
isNumber = true;
Console.WriteLine("Enter the First Number: ");
firstNumberString = Console.ReadLine();
firstNumberString = firstNumberString.Trim();
if (firstNumberString.Substring(0, 1) == "-")
{
firstCharIsNegativeForFirstNumber = true;
}
else
{
firstCharIsNegativeForFirstNumber = false;
}
isNumber = checkValidityOfNumber(firstNumberString, isNumber, firstCharIsNegativeForFirstNumber);
} while (isNumber == false);
String operation = "";
// We loop until the user enters a valid operator
// Anything except "+" or "-" or "*" or "/" or "%" is not accepted
do
{
Console.WriteLine("Enter A Valid Operator: ");
operation = Console.ReadLine();
} while (operation != "+" && operation != "-" && operation != "*" &&
operation != "/" && operation != "%");
String secondNumberString;
// We check the number validity of the second entered number
do
{
isNumber = true;
Console.WriteLine("Enter The Second Number: ");
secondNumberString = Console.ReadLine();
secondNumberString = secondNumberString.Trim();
if (secondNumberString.Substring(0, 1) == "-")
{
firstCharIsNegativeForSecondNumber = true;
}
else
{
firstCharIsNegativeForSecondNumber = false;
}
isNumber = checkValidityOfNumber(secondNumberString, isNumber, firstCharIsNegativeForSecondNumber);
} while (isNumber == false);
// firstNumberString and secondNumberString are converted to double to
// make operations
double firstNumberDouble = Double.Parse(firstNumberString);
double secondNumberDouble = Double.Parse(secondNumberString);
//if (firstCharIsNegativeForFirstNumber)
//{
// firstNumberDouble = -firstNumberDouble;
//}
//if (firstCharIsNegativeForSecondNumber)
//{
// secondNumberDouble = -secondNumberDouble;
//}
double result;
String resultDivision;
result = calculator.DoOperation(firstNumberDouble, secondNumberDouble, operation);
resultDivision = calculator.getMessageDivideByZero();
if (!resultDivision.Trim().Equals(""))
{
Console.WriteLine(resultDivision);
}
else
{
Console.WriteLine("Result: ");
Console.WriteLine(result);
}
String anotherOp;
Console.WriteLine("Another Operation?: Y Or y for Yes or enter to quit: ");
anotherOp = Console.ReadLine();
if (anotherOp == "Y" || anotherOp == "y")
{
repeat = true;
}
else
{
calculator.Finish();
repeat = false;
}
} while (repeat == true);
