The example of this paper shares the specific code of C language to implement 3 sub-chess games for your reference, the specific content is as follows

#include<stdio.h>
#include<stdlib.h>
#include<time.h>

void chess_board(char arr[3][3]) // Printed board
{
 int i = 0;
 int j = 0;
 for (i = 0; i < 3; i++)
 {
 printf( " %c | %c | %c \n", arr [i][0], arr[i][1], arr[i][2]);
 if (i<2)
 printf( "---|---|---\n");
 }
}

int success_or_failure(char arr[3][3]) // Determine the outcome
{
 int i = 0;
 int j = 0;
 for (i = 0; i < 3; i++)
 {
 if ((arr [i][0] == arr[i][1]) && ( arr[i][j] == arr [i][2]))
 {
 if (arr [i][0] == '#')
  return 1; // The user won
 else if (arr[i][0] == '0')
  return -1; // Computer won
 }
 }
 for (j = 0; j < 3; j++)
 {
 if ((arr [0][j] == arr[1][j]) && ( arr[1][j] == arr [2][j]))
 {
 if (arr [0][j] == '#')
 return 1;  // The user won
 else if (arr[0][j] == '0')
 return -1; // Computer won
 }
 }
 if ((arr [0][0] == arr[1][1]) && ( arr[0][0] == arr [2][2]))
 {
 if (arr [1][1] == '#')
  return 1; // The user won
 else if (arr[1][1] == '0')
  return -1; // Computer won
 }
 if ((arr [0][2] == arr[1][1]) && ( arr[0][2] == arr [2][0]))
 {
 if (arr [1][1] == '#')
  return 1; // The user won
 else if (arr[1][1] == '0')
  return -1; // Computer won
 }
 for (i = 0; i < 3; i++)
 {
 for (j = 0; j < 3; j++)
  {
  if (arr [i][j] == ' ')
  return 0; // Didn't win
  }
 }
 return -2;  // A draw
}

int user_game(char arr[3][3])  // User input
{
 int x = 0;
 int y = 0;
 while (1)
 {
 printf( "please user input:(x, y) ");
 scanf( "%d%d", &x, &y);
 printf( "\n");
 if ((x<1 && x>3) || (y<1 && y>3)) // Determine if user input is valid
 {
 printf( " The address is invalid. Please reenter it \n" );
 break;
 }
 if (arr [x - 1][y - 1] == ' ') // Determine if the spot is occupied
 {
 arr[x - 1][y - 1] = '#' ;
 break;
 }
 printf( " The address is invalid. Please reenter it \n" );
 }
 chess_board( arr);
 int ret=success_or_failure(arr );
 return ret;
}

int computer_game(char arr[3][3])  // Computer input
{
 printf( "computer input:\n\n");
 int x = 0;
 int y = 0;
 while (1)
 {  // produce 1 A position not occupied by a pawn
 srand(( unsigned)time(NULL ));
 x = rand() % 3;
 srand(( unsigned)time(NULL ));
 y = rand() % 3;
 if (arr [x][y] == ' ')
 break;
 }
 arr[x][y]= '0' ;
 chess_board(arr);
 int ret=success_or_failure(arr);
 return ret;
}


void init(char arr[][3] )   // Initializing checkerboard
{

 for (int i = 0; i < 3; i++)
 {
 for (int j = 0; j<3; j++)
 {
 arr[i][j] = ' ';
 }
 }
}

int main()
{
 printf( "**********************\n"); // Print menu
 printf( "******* *******\n");
 printf( "*******1.go 0.exit**\n");
 printf( "******* *******\n");
 printf( "**********************\n");
 printf( "**********************\n\n\n");
 char arr[3][3];
 while (1)
 {
 init(arr);  // Initializing checkerboard
 int count = 0;
 printf( "\nplease choice:1 or 0 : " );
 scanf( "%d", &count); // Choose function
 if (count == 0)
 {
 exit( EXIT_FAILURE);
 }
 else if (count == 1)
 {
 printf( "\n**** The game start ****\n\n" );
 while (1)
 { int n1 = user_game(arr);
 {
 if (n1 == 1)
 {
  printf( "**** Congratulations to the player for winning ****\n" );
  break;
 }
 }
 int n2 = computer_game(arr);
 {
  if (n2 == -1)
  {
  printf( "**** Computer won ****\n" );
  break;
  }
 }
 if ((n1 == -2) || (n2 == -2))
 {
 printf( "***** A draw ******\n" );
 break;
 }
 }
  printf( "\n Come again 1 Bureau of \n\n" );
 }
 return 0;
}

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