public void backSpaceTest(string expr, string expected)
{
DataCollector DC = new DataCollector();
DC.SetExpr(expr);
DC.BackSpaceExpression();
Assert.Equal(expected, DC.GetExpr());
}
public void addTest(string expr, string add, string expected)
{
DataCollector DC = new DataCollector();
DC.SetExpr(expr);
DC.ChangeState();
DC.AddStringExpression(add);
Assert.Equal(expected, DC.GetExpr());
}
private void EvalBtn_Click(object sender, EventArgs e)
{
if (data.GetExpr().Equals(""))
{
MessageBox.Show("Expression Empty");
}
else
{
try
{
if (data.GetStateAnswer())
{
data.SetExpr(Parser.ChangeVariable("ans", data.GetAnswer(), data.GetExpr()));
}
double holder = EvalBtn.GetResultEvaluation(data.GetExpr());
data.ChangeAnswer(holder);
ChangeText();
data.SetExpr(holder.ToString());
}
catch (MathErrorException error)
{
data.SetExpr("0");
data.ChangeAnswer(0);
data.ChangeState();
MessageBox.Show(error.errorMessage(), "Arithmetic Error"); // first argument : the error message, the second argument : the error header message
ChangeText();
}
catch (SyntaxErrorException error)
{
data.SetExpr("0");
data.ChangeAnswer(0);
data.ChangeState();
MessageBox.Show(error.errorMessage(), "Syntax Error"); // first argument : the error message, the second argument : the error header message
ChangeText();
}
}
}