public void EvaluatePostFixString()
{
// Arrange
string postFixString = " 6 m 1 m 5 - m / 1 m + "; // == -6/-(-1-5)+-1 (infix)
PostfixEvaluator pe = new PostfixEvaluator();
// Act
decimal result = pe.Evaluate(postFixString);
// Assert
Assert.AreEqual(-2m, result, string.Format("Evaluation of \"{0}\" failed!", postFixString));
// Arrange
postFixString = " 6 m 1 m 5 - m / 1 p + "; // == -6/-(-1-5)++1 (infix)
// Act
result = pe.Evaluate(postFixString);
// Assert
Assert.AreEqual(0m, result, string.Format("Evaluation of \"{0}\" failed!", postFixString));
// Arrange
postFixString = "3 4 2 * 1 5 - 2 3 ^ ^ / +"; // 3 + 4 * 2 / (1 - 5) ^ 2 ^ 3 (infix)
// Act
result = pe.Evaluate(postFixString);
// Assert
Assert.AreEqual(3.0001220703125m, result, string.Format("Evaluation of \"{0}\" failed!", postFixString));
// Arrange
postFixString = "1 1 + 1 + 1 +"; // 1+(1)+(1)+1 (infix)
// Act
result = pe.Evaluate(postFixString);
// Assert
Assert.AreEqual(4m, result, string.Format("Evaluation of \"{0}\" failed!", postFixString));
// Arrange
postFixString = "1 1 m + 1 m + 1 +"; // 1+(-1)+(-1)+1 (infix)
// Act
result = pe.Evaluate(postFixString);
// Assert
Assert.AreEqual(0m, result, string.Format("Evaluation of \"{0}\" failed!", postFixString));
// Arrange
postFixString = "1 1 m -"; // (1)-(-1) (infix)
// Act
result = pe.Evaluate(postFixString);
// Assert
Assert.AreEqual(2m, result, string.Format("Evaluation of \"{0}\" failed!", postFixString));
//
}
private void button2_Click(object sender, EventArgs e)
{
tbTokenOutput.AppendText(string.Format("PostfixEvaluation:{0}", Environment.NewLine));
try
{
PostfixEvaluator eva = new PostfixEvaluator();
var result = eva.Evaluate(tbPostfix.Text);
tbResult.Text = result.ToString();
}
catch (Exception ex)
{
tbResult.Text = string.Format("Error: {0}{1}", ex.Message, Environment.NewLine);
tbTokenOutput.AppendText(tbResult.Text);
}
}
private void button1_Click(object sender, EventArgs e)
{
try
{
ShowTokens();
InfixToPostfixConverter conv = new InfixToPostfixConverter(new Tokenizer());
var postfix = conv.Convert(tbSource.Text);
tbPostfix.Text = postfix;
PostfixEvaluator eva = new PostfixEvaluator();
var result = eva.Evaluate(postfix);
tbResult.Text = result.ToString();
}
catch (Exception ex)
{
tbResult.Text = string.Format("Error: {0}{1}", ex.Message, Environment.NewLine);
tbTokenOutput.AppendText(tbResult.Text);
}
}