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84 lines
2.3 KiB
84 lines
2.3 KiB
using System;
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using System.Linq;
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// ISBN-Rechner von Artur, Chris und Fionn
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namespace ISBN
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{
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internal class Program
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{
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static void Main(string[] args)
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{
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while (true)
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{
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string input = GetInput(), mode = "NULL";
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string[] split = input.Select(x => x.ToString()).ToArray();
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if (split.Count() == 10) mode = "VALIDATE";
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if (split.Count() == 9) mode = "GENERATE";
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if (mode == "NULL")
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{
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Console.WriteLine($"\"{input}\" is no valid input. See the rules above for valid input!");
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continue;
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}
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bool skip = false;
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int temp = 0;
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for(int i = 0; i < 9; i++)
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{
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string sign = split[i];
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int parsedInt;
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if(!int.TryParse(sign, out parsedInt))
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{
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skip = true;
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break;
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}
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temp += parsedInt * (i + 1);
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}
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if (skip) continue;
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Console.WriteLine(temp);
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temp %= 11;
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string sum = temp == 10 ? "X" : temp.ToString();
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Console.WriteLine($"Calculated Checksum is {sum}.");
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if (mode == "VALIDATE")
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{
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string inCheck = split[9];
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Console.Write($"{inCheck} was given. ");
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Console.WriteLine(inCheck == sum ? "They are the same." : "They are not the same.");
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}
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Console.WriteLine("\n\n\n");
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}
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}
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internal static string GetInput()
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{
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while (true)
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{
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Console.Write("Pls input complete ISBN (can be only ISBN-10, with ot without checksum, do not include dashes!):\n-> ");
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string input = Console.ReadLine();
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if (input == null || input == "") continue;
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if (input == "q")
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{
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Console.WriteLine("Bye bye!");
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Environment.Exit(0);
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}
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return input;
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}
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}
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}
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}
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