static void Main(string[] args)
{
StringBuilder description = new StringBuilder("Project Euler");
description.AppendLine("Project Euler provides a large collection of challenges in the domain of computer science and mathematics.");
description.AppendLine("The challenges typically involve writing a small program to figure out the solution");
description.AppendLine("to a clever mathematical formula or equation, such as finding the sum of digits");
description.AppendLine("of all numbers preceding each number in a series.\n");
description.AppendLine("Bellow is a list of the problems to pick from to get a solution for\n");
Console.ForegroundColor = ConsoleColor.Red;
Console.Write(description);
int id = -1;
foreach (var value in Enum.GetValues(typeof(EulerProblems)))
{
Console.ForegroundColor = ConsoleColor.Blue;
Console.Write((int)value + ": " + value + "\n");
id = (int)value;
}
Console.ForegroundColor = ConsoleColor.White;
Console.Write("\nType in a number to get Problems answers.\n");
var input = Console.ReadKey();
Console.WriteLine();
// stops wrong inputs
int number = 0;
while (!Int32.TryParse(input.KeyChar.ToString(), out number) || (number > id || number == 0))
{
Console.Write("\nPick a number from the list of problems.\n");
input = Console.ReadKey();
}
// Get a enum value to check agaisnt list
if (Enum.IsDefined(typeof(EulerProblems), number))
{
var problem = (EulerProblems)number;
Console.Clear();
switch (problem)
{
case EulerProblems.MultiplesOf3And5:
MultiplesOf3And5.SolveMultiples();
break;
case EulerProblems.EvenFibonacciNumbers:
EvenFibonacciNumbers.SolveEvenFibonacci();
break;
case EulerProblems.LargestPrimeFactor:
LargestPrimeFactor.ComputeLargestPrime();
break;
case EulerProblems.LargestPalindromeProduct:
LargestPalindromeProduct.GetLargestPalindrome();
break;
}
}
// pause at the end
Console.Read();
}
