// Evaluates the operator, calls the right math method, prints answer, and passes answer to it's recall method
public void Calculate(string Operator, string UserInput)
{
if (Operator == "+") // Addition
{
Answer = Calculator.Add(First, Second);
Console.WriteLine("Answer: " + Answer);
Stack.LastAnswer(UserInput, Answer);
}
else if (Operator == "-") // Subtraction
{
Answer = Calculator.Subtract(First, Second);
Console.WriteLine("Answer: " + Answer);
Stack.LastAnswer(UserInput, Answer);
}
else if (Operator == "*") // Multiplication
{
Answer = Calculator.Multiply(First, Second);
Console.WriteLine("Answer: " + Answer);
Stack.LastAnswer(UserInput, Answer);
}
else if (Operator == "/") // Division
{
if (Second == 0) // Throws error message if trying to divide by zero
{
Console.WriteLine("You can't divide by zero, Holmes.");
}
else
{
Answer = Calculator.Divide(First, Second);
Console.WriteLine("Answer: " + Answer);
Stack.LastAnswer(UserInput, Answer);
}
}
else if (Operator == "%") // Modulus Function
{
Answer = Calculator.Modulus(First, Second);
Console.WriteLine("Answer: " + Answer);
Stack.LastAnswer(UserInput, Answer);
}
}
static void Main(string[] args)
{
int counter = 1;
StackStorage mathStack = new StackStorage();
while (true)
{
Console.Write($"[{counter}]> ");
string Command = Console.ReadLine();
if (Command.ToLower() == "quit" || Command.ToLower() == "exit")
{
Environment.Exit(0);
}
else if (Command == "last")
{
Command = mathStack.getLastProblem();
}
else if (Command == "lastq")
{
Console.WriteLine("last problem was " + mathStack.getLastProblem());
}
//initalize regex expression
Expression expression = new Expression();
expression.VerifyExpression(Command);
int firstNum = expression.FirstNum;
int secondNum = expression.SecondNum;
string Operator = expression.Operator;
string userMathExpression = (firstNum + Operator + secondNum).ToString();
//adds the user input into addMathToStack and makes it a string
mathStack.addMathToStack(userMathExpression);
//switch statement for calculations
switch (Operator)
{
case "+":
Calculator calcAdd = new Calculator();
Console.WriteLine(" = " + calcAdd.Add(firstNum, secondNum));
break;
case "-":
Calculator calcSubtract = new Calculator();
Console.WriteLine(" = " + calcSubtract.Subtract(firstNum, secondNum));
break;
case "*":
Calculator calcMultiply = new Calculator();
Console.WriteLine(" = " + calcMultiply.Multiply(firstNum, secondNum));
break;
case "/":
Calculator calcDivide = new Calculator();
Console.WriteLine(" = " + calcDivide.Divide(firstNum, secondNum));
break;
case "%":
Calculator calcModulus = new Calculator();
Console.WriteLine(" = " + calcModulus.Modulus(firstNum, secondNum));
break;
default:
break;
}
counter++;
}
}