static void Main(string[] args)
{
ChangeMaker change = new ChangeMaker();
change.AddDefaultCurrencies();
string filename;
if (args.Length > 0)
{
filename = args[0];
}
else
{
Console.WriteLine("Please enter a file name to parse: ");
filename = Console.ReadLine();
}
List <RegisterTransaction> transactions;
transactions = ReadFile(filename);
foreach (RegisterTransaction trans in transactions)
{
trans.change = change.GetChange(trans.total, trans.paid);
Console.WriteLine(trans.change);
}
Console.WriteLine("Press enter to exit.");
Console.ReadLine();
}
static void Main(string[] args)
{
if (args.Length != 1)
{
Console.WriteLine("There must be exactly 1 argument (input file path)");
return;
}
var amountsFilePath = args[0];
try
{
// Read each line in file.
using (var sr = new StreamReader(amountsFilePath))
{
// Write output file, with a ".out" extension.
using (var sw = new StreamWriter(amountsFilePath + ".out"))
{
string line;
while ((line = sr.ReadLine()) != null)
{
line = line.Trim();
if (string.IsNullOrEmpty(line))
{
// Nothing to do.
continue;
}
// Get amount-owed string and amount-paid string.
var tokens = line.Split(",".ToCharArray());
if (tokens.Length != 2)
{
// Write error for this line but continue processing lines...
Console.WriteLine("Error reading input file: line does not contain 2 comma-separated strings: " + line);
continue;
}
var amountOwed = ValidateAmount(tokens[0].Trim());
var amountPaid = ValidateAmount(tokens[1].Trim());
if (amountOwed < 0 || amountPaid < 0 || amountPaid < amountOwed)
{
Console.WriteLine("Invalid values found while reading line: " + line);
continue;
}
// Make change and write it to output file.
var changeMaker = new ChangeMaker(amountOwed, amountPaid);
var change = changeMaker.MakeChange();
sw.WriteLine(change);
}
}
}
}
catch (Exception e)
{
Console.WriteLine("An error occurred while reading the input file: " + e.Message);
}
}