public int EvaluateInput(string input, Constant constant)
{
Parser parse = new Parser();
Add add_input = new Add();
Subtract subtract_input = new Subtract();
Multiply multiply_input = new Multiply();
Divide divide_input = new Divide();
Modulo modulo_input = new Modulo();
if (parse.GetOperator(input) == '+')
{
return add_input.AddConstants(input, constant);
}
if (parse.GetOperator(input) == '-')
{
return subtract_input.SubtractConstants(input, constant);
}
if (parse.GetOperator(input) == '*')
{
return multiply_input.MultiplyConstants(input, constant);
}
if (parse.GetOperator(input) == '/')
{
return divide_input.DivideConstants(input, constant);
}
if (parse.GetOperator(input) == '%')
{
return modulo_input.ModuloConstants(input, constant);
}
throw new FormatException();
}
static void Main(string[] args)
{
int count = 0;
Parser parse = new Parser();
Constant constant = new Constant();
Evaluate evaluate_input = new Evaluate();
Char result1;
Char result2;
int result3;
int result4;
while (true)
{
Console.Write("[{0}]", count);
string input = Console.ReadLine();
if (input.ToLower() == "exit" || input.ToLower() == "quit")
{
break;
}
bool testIfFirstIsChar = Char.TryParse(parse.GetFirst(input), out result1);
bool testIfSecondIsChar = Char.TryParse(parse.GetSecond(input), out result2);
bool testIfFirstIsNum = int.TryParse(parse.GetFirst(input), out result3);
bool testIfSecondIsNum = int.TryParse(parse.GetSecond(input), out result4);
if (input.Length == 1)
{
Console.WriteLine(" = {0} is {1}", input, constant.GetConstant(char.Parse(input)));
}
else if (testIfFirstIsChar && !testIfFirstIsNum && parse.GetOperator(input) == '=')
{
constant.AddConstant(result1, result4);
Console.WriteLine("= '{0}' is '{1}' ", result1, result4);
}
else if (testIfFirstIsChar && !testIfFirstIsNum && testIfSecondIsNum || testIfSecondIsChar && !testIfSecondIsNum && testIfFirstIsNum || !testIfFirstIsNum && !testIfSecondIsNum)
{
Console.WriteLine("= {0}", evaluate_input.EvaluateInput(input, constant));
}
else if (testIfFirstIsNum && testIfSecondIsNum)
{
Console.WriteLine("= {0}", evaluate_input.EvaluateInput(input));
}
count++;
}
}
public void ParserEnsureGetOperatorWorksWithoutSpaces()
{
string input = "2+2";
Parser parse = new Parser();
Assert.AreEqual('+', parse.GetOperator(input));
}
public void ParserEnsureGetOperatorWorksWithNegativeIntegersSpaces()
{
string input = "-2 + 2";
Parser parse = new Parser();
Assert.AreEqual('+', parse.GetOperator(input));
}
