/// <summary>
/// Runs application
/// </summary>
internal void Run()
{
_userInteraction.DisplayInfo("This application displays pairs from an imput list. Sum of these pairs equal specific value X");
_userInteraction.DisplayInfo(string.Empty);
_userInteraction.DisplayInfo("Enter an input list of numbers (Int32) separated by space ' ':");
_userInteraction.DisplayInfo("Example: 1 3 5 6");
var line = _userInteraction.ReadUserInput();
if (string.IsNullOrEmpty(line))
{
_userInteraction.DisplayInfo("The line is empty.");
return;
}
var stringList = line.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
IEnumerable <int> numberList;
try
{
numberList = ConvertToIntArray(stringList);
}
catch (ArgumentException ex)
{
_userInteraction.DisplayInfo(ex.Message);
return;
}
_userInteraction.DisplayInfo("Enter X - sum of pair:");
line = _userInteraction.ReadUserInput();
if (string.IsNullOrEmpty(line))
{
_userInteraction.DisplayInfo("The line is empty.");
return;
}
int x;
if (!int.TryParse(line, out x))
{
_userInteraction.DisplayInfo("The X is invalid.");
return;
}
var pairs = NumberTool.MatchSumOfPairs(numberList, x);
DisplayPairs(pairs);
}