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//TC Kimlik numaraları 11 basamaktan oluşmaktadır
//İlk 9 basamak arasında kurulan bir algoritma bize 10. basamağı,
//ilk 10 basamak arasında kurulan algoritma ise bize 11. basamağı verir.
//11 hanelidir.
//Her hanesi rakamsal değer içerir.
//İlk hane 0 olamaz.
//1. 3. 5. 7. ve 9. hanelerin toplamının 7 katından, 2. 4. 6. ve 8. hanelerin
// toplamı çıkartıldığında, elde edilen sonucun 10’a bölümünden kalan,
// yani Mod 10’u bize 10. haneyi verir.
//1. 2. 3. 4. 5. 6. 7. 8. 9. ve 10. hanelerin toplamından elde edilen
// sonucun 10’a bölümünden kalan, yani Mod10’u bize 11. haneyi verir.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication21
{
class tcKontrol
{
public void kontrol(string kimlikNo)
{
int toplam = 0; int toplam2 = 0; int toplam3 = 0;
if (kimlikNo.Length == 11)
{
if (Convert.ToInt32(kimlikNo[0].ToString()) != 0) //tc kimlik numaranın ilk hanesi 0 değilse
{
for (int i = 0; i < 10; i++)
{
toplam = toplam + Convert.ToInt32(kimlikNo[i].ToString());
if (i % 2 == 0)
{
if (i != 10)
{
toplam2 = toplam2 + Convert.ToInt32(kimlikNo[i].ToString()); // 7 ile çarpılacak sayıları topluyoruz
}
}
else
{
if (i != 9)
{
toplam3 = toplam3 + Convert.ToInt32(kimlikNo[i].ToString());
}
}
}
}
else
{
Console.WriteLine("Tc Kimlik Numaranızın ilk hanesi 0 olamaz.");
}
}
else
{
Console.WriteLine("Tc Kimlik Numarınız 11 haneli olmak zorunda.Eksik ya da fazla değer girdiniz.");
}
if (((toplam2 * 7) - toplam3) % 10 == Convert.ToInt32(kimlikNo[9].ToString()) && toplam % 10 == Convert.ToInt32(kimlikNo[10].ToString()))
{
Console.WriteLine("Tc Kimlik Numarası Doğru.");
}
else
{
Console.WriteLine("Tc Kimlik Numarası Yanlış!");
}
}
}
class Program
{
static void Main(string[] args)
{
tcKontrol tc = new tcKontrol();
Console.Write("Kimlik Numaranızı Giriniz = ");
string tcNo = Console.ReadLine();
tc.kontrol(tcNo);
Console.ReadLine();
}
}
}
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