Крестики-Нолики 10*10 на С+

[ВиКтриЯ]

Здравствуйте, помогите,пожалуйста, исправить игру. Когда вводишь цифру, например, 4, то все четверки записываются как х или 0. И помогите исправить проверку на выигрыш одного из игроков.

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdbool.h>
//---------------------------------------------//
// Функция приобразует значение символа в индекс массива
unsigned CharToPos(char ch)
{
   static const int COffs = 49;
   return (ch - COffs);
}
//---------------------------------------------//
// Вывод на экран игрового поля
void PrintField(const char* arr)
{
   static const char CField[] = "  1 |  2 |  3 |  4 |  5 |  6 |  7 |  8 |  9 | 10\n"
                                "----+----+----+----+----+----+----+----+----+-----\n"
                                " 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20\n"
                                "----+----+----+----+----+----+----+----+----+-----\n"
                                " 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30\n"
			        "----+----+----+----+----+----+----+----+----+-----\n"
				" 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40\n"
				"----+----+----+----+----+----+----+----+----+-----\n"
			        " 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50\n"
				"----+----+----+----+----+----+----+----+----+-----\n"
				" 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60\n"
				"----+----+----+----+----+----+----+----+----+-----\n"
			        " 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70\n"
				"----+----+----+----+----+----+----+----+----+-----\n"
				" 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80\n"
				"----+----+----+----+----+----+----+----+----+-----\n"
				" 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90\n"
				"----+----+----+----+----+----+----+----+----+-----\n"
				" 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100\n";
   const char* ch = CField;
   while (*ch)
   {
      if (isdigit(*ch) && arr[CharToPos(*ch)])
      {
         printf("%c", arr[CharToPos(*ch)]);
      }
      else
      {
         printf("%c", *ch);
      }
      ch++;
   }
}
//---------------------------------------------//
// Фиксация хода игрока
bool SetValue(char* arr, char val, unsigned pos)
{
   bool isExecute = false;
   if (arr[pos] == 0)
   {
      arr[pos] = val;
      isExecute = true;
   }
   return isExecute;
}
//---------------------------------------------//
// Проверка на выигрыш одного из игроков
bool CheckWin(const char* arr)
{
   return (arr[0] && (arr[0] == arr[1]) && (arr[1] == arr[2])) ||
          (arr[3] && (arr[3] == arr[4]) && (arr[4] == arr[5])) ||
          (arr[6] && (arr[6] == arr[7]) && (arr[7] == arr[8])) ||
          (arr[0] && (arr[0] == arr[3]) && (arr[3] == arr[6])) ||
          (arr[1] && (arr[1] == arr[4]) && (arr[4] == arr[7])) ||
          (arr[2] && (arr[2] == arr[5]) && (arr[5] == arr[8])) ||
          (arr[0] && (arr[0] == arr[4]) && (arr[4] == arr[8])) ||
          (arr[2] && (arr[2] == arr[4]) && (arr[4] == arr[6]));
}
//---------------------------------------------//
int main()
{
   static const char CVal[] = {'x', 'o'};
   char arr[100] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
   unsigned notUsed = sizeof(arr) / sizeof(*arr);
   
   unsigned player = 0;
   char ch;
   bool isPlay = true;
   PrintField(arr);
   while (isPlay)
   {
      printf("[%c]: ", CVal[player]);
      scanf("%c", &ch);
      fflush(stdin);
      printf("\n");
      if (isdigit(ch) && SetValue(arr, CVal[player], CharToPos(ch)))
      {
         notUsed--;
         player = !player;
      }
      PrintField(arr);
      if (CheckWin(arr))
      {
         isPlay = false;
         printf("Player '%c' is win!\n", CVal[!player]);
      }
      else if (notUsed == 0)
      {
         isPlay = false;
         printf("Game over\n");
      }
   }
   return 0;
}