Girilen Karakteri Bulan C++ Programı

#include <iostream>
using namespace std;

void main()
{
 unsigned char ch;

 for (ch=0; ch<255; ch++)
 {
  cout << int(ch) << " " << ch << "  ";

  if (isalpha(ch))
   if(islower(ch))
    cout << "Kucuk Harf\n";
   else
    cout << "Buyuk Harf\n";
  else if (iscntrl(ch))
   cout << "Kontrol Karakteri\n";
  else if (isdigit(ch))
   cout << "Rakam\n";
  else if (ispunct(ch))
   cout << "Noktalama\n";
  else
   cout << "Diger" << endl;
 }
 system("pause");
}