具有难度选择的C语言扫雷游戏

以下是一个具有难度选择的C语言扫雷游戏的示例代码：

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

#define ROWS 10
#define COLS 10
#define EASY_MINES 10
#define NORMAL_MINES 30
#define HARD_MINES 50

void init_board(int board[][COLS], int rows, int cols);
void print_board(int board[][COLS], int rows, int cols, int show_mines);
void place_mines(int board[][COLS], int rows, int cols, int num_mines);
void reveal_square(int board[][COLS], int rows, int cols, int row, int col);
int count_adjacent_mines(int board[][COLS], int rows, int cols, int row, int col);
int check_win(int board[][COLS], int rows, int cols, int num_mines);
void play_game(int board[][COLS], int rows, int cols, int num_mines);

int main() {
    int board[ROWS][COLS];
    int difficulty;
    
    srand(time(NULL)); // seed the random number generator
    
    printf("Welcome to Minesweeper!\n");
    printf("Select difficulty:\n");
    printf("1. Easy\n");
    printf("2. Normal\n");
    printf("3. Hard\n");
    scanf("%d", &difficulty);
    
    switch(difficulty) {
        case 1:
            play_game(board, ROWS, COLS, EASY_MINES);
            break;
        case 2:
            play_game(board, ROWS, COLS, NORMAL_MINES);
            break;
        case 3:
            play_game(board, ROWS, COLS, HARD_MINES);
            break;
        default:
            printf("Invalid difficulty level.\n");
            break;
    }
    
    return 0;
}

void init_board(int board[][COLS], int rows, int cols) {
    int i, j;
    for(i = 0; i < rows; i++) {
        for(j = 0; j < cols; j++) {
            board[i][j] = 0;
        }
    }
}

void print_board(int board[][COLS], int rows, int cols, int show_mines) {
    int i, j;
    printf("  ");
    for(j = 0; j < cols; j++) {
        printf("%d ", j);
    }
    printf("\n");
    for(i = 0; i < rows; i++) {
        printf("%d ", i);
        for(j = 0; j < cols; j++) {
            if(board[i][j] == -1 && show_mines) {
                printf("* ");
            } else if(board[i][j] < 0) {
                printf("  ");
            } else {
                printf("%d ", board[i][j]);
            }
        }
        printf("\n");
    }
}

void place_mines(int board[][COLS], int rows, int cols, int num_mines) {
    int i, j, count = 0;
    while(count < num_mines) {
        i = rand() % rows;
        j = rand() % cols;
        if(board[i][j] != -1) {
            board[i][j] = -1;
            count++;
        }
    }
}

void reveal_square(int board[][COLS], int rows, int cols, int row, int col) {
    if(board[row][col] != 0) {
        return;
    }
    int i, j;
    for(i = row - 1; i <= row + 1; i++) {
        for(j = col - 1; j <= col + 1; j++) {
            if(i >= 0 && i < rows && j >= 0 && j < cols) {
                if(board[i][j] == -1) {
                    continue;
                } else if(board[i][j] > 0) {
                    board[i][j] *= -1;
                } else {
                    board[i][j] = abs(board[i][j]);
                    reveal_square(board, rows, cols, i, j);
                }
            }
        }
    }
}

int count_adjacent_mines(int board[][COLS], int rows, int cols, int row, int col) {
    int i, j, count = 0;
    for(i = row - 1; i <= row + 1; i++) {
        for(j = col - 1; j <= col + 1; j++) {
            if(i >= 0 && i < rows && j >= 0 && j < cols) {
                if(board[i][j] == -1) {
                    count++;
                }
            }
        }
    }
    return count;
}

int check_win(int board[][COLS], int rows, int cols, int num_mines) {
    int i, j, count = 0;
    for(i = 0; i < rows; i++) {
        for(j = 0; j < cols; j++) {
            if(board[i][j] == -1) {
                continue;
            } else if(board[i][j] < 0) {
                count++;
            }
        }
    }
    if(count == rows * cols - num_mines) {
        return 1;
    } else {
        return 0;
    }
}

void play_game(int board[][COLS], int rows, int cols, int num_mines) {
    int i, j, row, col, game_over = 0, win = 0;
    init_board(board, rows, cols);
    place_mines(board, rows, cols, num_mines);
    while(!game_over && !win) {
        print_board(board, rows, cols, 0);
        printf("Enter row and column to reveal: ");
        scanf("%d %d", &row, &col);
        if(board[row][col] == -1) {
            game_over = 1;
            board[row][col] *= -1;
        } else if(board[row][col] == 0) {
            board[row][col] = abs(board[row][col]);
            reveal_square(board, rows, cols, row, col);
        } else {
            board[row][col] = abs(board[row][col]);
        }
        win = check_win(board, rows, cols, num_mines);
    }
    print_board(board, rows, cols, 1);
    if(game_over) {
        printf("Game over! You hit a mine.\n");
    } else if(win) {
        printf("Congratulations! You won the game.\n");
    }
}

该游戏使用二维数组来表示游戏板，-1表示地雷，0表示空方块，1-8表示周围8个方块中地雷的数量。`init_board`函数初始化游戏板，`print_board`函数打印游戏板，`place_mines`函数随机放置地雷。`reveal_square`函数用于递归展开周围的空方块，`count_adjacent_mines`函数用于计算周围地雷的数量，`check_win`函数用于检查是否获胜。`play_game`函数是主要的游戏循环，循环结束条件是踩到地雷或者获胜。在游戏结束后，调用`print_board`函数以显示所有地雷的位置。