public static void AskSubtractionQuestions(Generator generator)
{
Subtract subject = new Subtract();
var questionCount = generator.QuestionCount;
var currentQuestion = 1;
while (currentQuestion <= questionCount)
{
SubtractionProblem p = (SubtractionProblem)subject.GenerateQuestion(generator.Difficulty);
var isCorrect = false;
while (!isCorrect)
{
// Ask question
p.PrintQuestion(currentQuestion);
// Get answer
Console.Write("Answer: ");
int answer = 0;
bool validAnswer = true;
try
{
answer = Convert.ToInt32(Console.ReadLine());
}
catch (Exception)
{
validAnswer = false;
}
// Work out if answer is correct
if (validAnswer)
{
isCorrect = subject.IsCorrect(p, answer);
Console.WriteLine(isCorrect ? "Correct!" : "Not quite right. Try again.");
}
}
currentQuestion++;
}
}