public void TestMethod1()
{
var expression1 = ToyExpressionParser.ParseExpression("1.5 + 2");
var expression2 = ToyExpressionParser.ParseExpression(" (1.5+2) ");
Assert.AreEqual("(1.5 + 2)", expression1.ToString());
Assert.AreEqual("(1.5 + 2)", expression2.ToString());
}
public void TestMethod4()
{
var expression = ToyExpressionParser.ParseExpression(" - (- 2) ");
Assert.AreEqual("2", expression.Reduce(null).ToString());
expression = ToyExpressionParser.ParseExpression(" + (+ 2) ");
Assert.AreEqual("2", expression.Reduce(null).ToString());
}
static void Main(string[] args)
{
while (true)
{
Console.Write("<<< ");
var input = Console.ReadLine();
try
{
var expression = ToyExpressionParser.ParseExpression(input);
Console.Write(">>> ");
Console.WriteLine(expression.Reduce(null));
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
Console.WriteLine();
}
}
public void TestMethod3()
{
var expression = ToyExpressionParser.ParseExpression("(.5 + 1 - 2)*(-2)");
Assert.AreEqual("1", expression.Reduce(null).ToString());
}
public void TestMethod2()
{
var expression = ToyExpressionParser.ParseExpression("1*2+3/4");
Assert.AreEqual("((1 * 2) + (3 / 4))", expression.ToString());
}