/// <summary>
///
/// </summary>
/// <returns></returns>
/// <exception cref="System.ArgumentOutOfRangeException">Something is wrong with the digits you specified.</exception>
public Problem Generate()
{
Problem problem = new Problem();
problem.Left = generateValue(LeftDigits, RightDigits);
if (!Problem.IsUnary(Operation))
{
problem.Right = generateValue(RightDigits, LeftDigits);
}
problem.Operation = Operation;
if (!Problem.IsUnary(Operation))
{
applyConstraints(ref problem);
}
switch (Operation)
{
case MathPractice.Operation.Addition:
if (problem.Left.ToString().Length < problem.Right.ToString().Length)
{
reverseOperands(ref problem);
}
break;
case MathPractice.Operation.Subtraction:
if (problem.Left < problem.Right)
{
reverseOperands(ref problem);
}
break;
case MathPractice.Operation.Multiplication:
if (problem.Left.ToString().Length < problem.Right.ToString().Length)
{
reverseOperands(ref problem);
}
break;
}
return(problem);
}
/// <summary>
///
/// </summary>
/// <exception cref="System.ArgumentOutOfRangeException">Bad digit specifications.</exception>
public void PrintProblem()
{
currentProblem = Generator.Generate();
string leftText = currentProblem.Left.ToString();
string rightText = currentProblem.Right.ToString();
char opText = getOperationText(currentProblem.Operation);
Console.WriteLine("[#" + (TotalAnswers + 1).ToString() + "]");
if (Generator.Operation == Operation.DayOfWeek) //todo: make this suck less
{
Console.Write("What is the day of the week for New Year's Day in the year " + currentProblem.Left.ToString() + "? ");
}
else if (Problem.IsUnary(currentProblem.Operation))
{
Console.Write(leftText + opText + " = ");
}
else if (Vertical)
{
string answerPadding = getVerticalAnswerPadding(currentProblem);
Console.WriteLine("------------------");
Console.WriteLine(" " + answerPadding + leftText + "\t");
Console.Write(opText + " ");
for (int i = rightText.Length; i < leftText.Length; i++)
{
Console.Write(" ");
}
Console.WriteLine(answerPadding + rightText + "\t");
Console.WriteLine("------------------");
Console.Write(" ");
}
else
{
Console.Write(leftText + " " + opText + " " + rightText + " = ");
}
}
