program9_09.c

[C语言入门经典(第4版)]整本书的源码！值得推荐！全部是最简单的源码！

/* Program 9.9 REVERSI An Othello type game */
#include <stdio.h>
#include <stdbool.h>
#include <ctype.h>
#include <string.h>

const int SIZE =  6;                   /* Board size - must be even */
const char comp_c = '@';               /* Computer's counter        */
const char player_c = 'O';             /* Player's counter          */

/* Function prototypes */
void display(char board[][SIZE]);
int valid_moves(char board[][SIZE], bool moves[][SIZE], char player);
void make_move(char board[][SIZE], int row, int col, char player);
void computer_move(char board[][SIZE], bool moves[][SIZE], char player);
int best_move(char board[][SIZE], bool moves[][SIZE], char player);
int get_score(char board[][SIZE], char player);

int main(void)
{
  char board [SIZE][SIZE] = { 0 };    /* The board          */
  bool moves[SIZE][SIZE] = { false };    /* Valid moves        */
  int row = 0;                        /* Board row index    */
  int col = 0;                        /* Board column index */
  int no_of_games = 0;                   /* Number of games     */
  int no_of_moves = 0;                   /* Count of moves      */
  int invalid_moves = 0;                 /* Invalid move count  */
  int comp_score = 0;                    /* Computer score      */
  int user_score = 0;                    /* Player score        */
  char y = 0;                            /* Column letter       */
  int x = 0;                             /* Row number          */
  char again = 0;                        /* Replay choice input */

  /* Player indicator: true for player and false for computer */
  bool next_player = true;

  printf("\nREVERSI\n\n");
  printf("You can go first on the first game, then we will take turns.\n");
  printf("   You will be white - (%c)\n   I will be black   - (%c).\n",
                                                         player_c, comp_c);
  printf("Select a square for your move by typing a digit for the row\n "
                  "and a letter for the column with no spaces between.\n");
  printf("\nGood luck!  Press Enter to start.\n");
  scanf("%c", &again);

  /* The main game loop */
  do
  {
    /* On even games the player starts; */
    /* on odd games the computer starts */
    next_player = !next_player;
    no_of_moves = 4;                  /* Starts with four counters */

    /* Blank all the board squares */
    for(row = 0; row < SIZE; row++)
      for(col = 0; col < SIZE; col++)
        board[row][col] = ' ';

    /* Place the initial four counters in the center */
    int mid = SIZE/2;
    board[mid - 1][mid - 1] = board[mid][mid] = player_c;
    board[mid - 1][mid] = board[mid][mid - 1] = comp_c;
    /* The game play loop */
    do
    {
      display(board);                     /* Display the board  */
      if(next_player=!next_player)
      { /*   It is the player's turn                    */
        if(valid_moves(board, moves, player_c))
        {
          /* Read player moves until a valid move is entered */
          for(;;)
          {
            printf("Please enter your move (row column): ");
            scanf(" %d%c", &x, &y);    /* Read input        */
            y = tolower(y) - 'a';      /* Convert to column index */
            x--;                       /* Convert to row index    */
            if( x>=0 && y>=0 && x<SIZE && y<SIZE && moves[x][y])
            {
              make_move(board, x, y, player_c);
              no_of_moves++;          /* Increment move count */
              break;
            }
            else
              printf("Not a valid move, try again.\n");
          }
        }
        else                          /* No valid moves */
          if(++invalid_moves < 2)
          {
            printf("\nYou have to pass, press return");
            scanf("%c", &again);
          }
          else
            printf("\nNeither of us can go, so the game is over.\n");
      }
      else
      { /* It is the computer's turn                    */
        if(valid_moves(board, moves, '@')) /* Check for valid moves */
        {
          invalid_moves = 0;               /* Reset invalid count   */
          computer_move(board, moves, '@');
          no_of_moves++;                   /* Increment move count  */
        }
        else
        {
          if(++invalid_moves < 2)
            printf("\nI have to pass, your go\n"); /* No valid move */
          else
            printf("\nNeither of us can go, so the game is over.\n");
        }

      }
    }while(no_of_moves < SIZE*SIZE && invalid_moves<2);

    /* Game is over */
    display(board);                   /* Show final board  */

    /* Get final scores and display them */
    comp_score = user_score = 0;
    for(row = 0; row < SIZE; row++)
      for(col = 0; col < SIZE; col++)
      {
        comp_score += board[row][col] == comp_c;
        user_score += board[row][col] == player_c;
      }
    printf("The final score is:\n");
    printf("Computer %d\n    User %d\n\n", comp_score, user_score);

    printf("Do you want to play again (y/n): ");
    scanf(" %c", &again);             /* Get y or n             */
  }while(tolower(again) == 'y');      /* Go again on y       */

  printf("\nGoodbye\n");

  return 0;
}

/***********************************************
 * Function to display the board in its        *
 * current state with row numbers and column   *
 * letters to identify squares.                *
 * Parameter is the board array.               *
 ***********************************************/
void display(char board[][SIZE])
{
  /* Display the column labels */
  char col_label = 'a';               /* Column label   */
  printf("\n ");                      /* Start top line */
  for(int col = 0 ; col<SIZE ;col++)
    printf("   %c", col_label+col);   /* Display the top line */
  printf("\n");                       /* End the top line     */

  /* Display the rows