static void Main(string[] args)
{
int count = 0;
Constant currentConstant = new Constant();
Evaluate expression;
while (true)
{
Console.Write("[{0}]> ", count);
string input = Console.ReadLine();
expression = new Evaluate(input, currentConstant);
if (input.ToLower() == "exit" || input.ToLower() == "quit")
{
break;
}
else if (input.IndexOf("=")> -1)
{
//set variable
Parse addConstant = new Parse(input, currentConstant);
addConstant.setOperatorIndex();
currentConstant.addConst(addConstant.StringFirst(), addConstant.secondNum());
// = saved 'x' as '3'
Console.WriteLine("= saved '" + addConstant.StringFirst() + "' as '" + addConstant.secondNum() + "'");
}
else
{
int answer = expression.doMath();
Console.WriteLine(" = {0}", answer);
count++;
}
}
}
public void ConstantCanAdd()
{
Constant newConstant = new Constant();
newConstant.addConst("a", 2);
Evaluate twoPlusThree = new Evaluate("a + 3", newConstant);
Assert.AreEqual(5, twoPlusThree.doMath());
}
public void EvaluateCanSubtract()
{
Evaluate twoPlusThree = new Evaluate("2 - 3");
Assert.AreEqual(-1, twoPlusThree.doMath());
}
public void EvaluateCanMultiply()
{
Evaluate twoPlusThree = new Evaluate("2 * 3");
Assert.AreEqual(6, twoPlusThree.doMath());
}
public void EvaluateCanModulus()
{
Evaluate twelveModThree = new Evaluate("12 % 3");
Assert.AreEqual(0, twelveModThree.doMath());
}
public void EvaluateCanAddWithNegativeNumbers()
{
Evaluate twoPlusThree = new Evaluate("-2+-3");
Assert.AreEqual(-5, twoPlusThree.doMath());
}
public void EvaluateCanAdd()
{
Evaluate twoPlusThree = new Evaluate("2 + 3");
Assert.AreEqual(5, twoPlusThree.doMath());
}
