static void Main(string[] args)
{
// Variables
int choice = -1;
string name;
string options = "0. Exit\n" +
"1. Add a new Grade\n" +
"2. Calculate average\n" +
"3. Calculate lowest grade\n" +
"4. Calculate highest grade\n";
// Prompt the user to enter a name for the gradebook
Console.Write("Enter book name: ");
name = Console.ReadLine();
// Create new book with given name
var gradeBook = new Book(name);
while (choice != 0)
{
// Display Menu options
Console.WriteLine(options);
// Prompt user to enter choice
Console.Write("Enter choice: ");
// Then validate that they have entered an integer
while (!int.TryParse(Console.ReadLine(), out choice))
{
Console.Write("ERROR: Enter a valid choice: ");
}
// Execute the desired choice
switch (choice)
{
case 0:
Console.WriteLine("Bye.");
break;
case 1:
EnterGrade(gradeBook);
break;
case 2:
if (gradeBook.isEmpty())
{
Console.WriteLine("Add a grade to get started.");
}
else
{
Console.WriteLine($"The average of the grades is: {gradeBook.CalculateAverage():N2}");
}
break;
case 3:
if (gradeBook.isEmpty())
{
Console.WriteLine("Add a grade to get started.");
}
else
{
Console.WriteLine($"The average of the grades is: {gradeBook.CalculateLowestGrade():N2}");
}
break;
case 4:
if (gradeBook.isEmpty())
{
Console.WriteLine("Add a grade to get started.");
}
else
{
Console.WriteLine($"The average of the grades is: {gradeBook.CalculateHighestGrade():N2}");
}
break;
default:
Console.WriteLine($"Invalid option: {choice}");
break;
}
}
}
