用C语言写一个扫雷小游戏，要求在一个9 × 9 (初级)，16 × 16 (中级)，16 × 30 (高级)，或自定义大小的矩阵

以下是一个简单的扫雷游戏的C语言代码，支持9x9、16x16、16x30的游戏难度，以及自定义大小：

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

#define ROWS 30
#define COLS 16
#define MINES 99

int board[ROWS][COLS];
int visible[ROWS][COLS];

void init_board(int rows, int cols, int mines) {
    int i, j, k, r, c;
    for (i = 0; i < rows; i++) {
        for (j = 0; j < cols; j++) {
            board[i][j] = 0;
            visible[i][j] = 0;
        }
    }
    srand(time(NULL));
    for (k = 0; k < mines; k++) {
        do {
            r = rand() % rows;
            c = rand() % cols;
        } while (board[r][c] == 9);
        board[r][c] = 9;
        for (i = -1; i <= 1; i++) {
            for (j = -1; j <= 1; j++) {
                if (r + i >= 0 && r + i < rows && c + j >= 0 && c + j < cols && board[r + i][c + j] != 9) {
                    board[r + i][c + j]++;
                }
            }
        }
    }
}

void print_board(int rows, int cols) {
    int i, j;
    printf("\n");
    for (i = 0; i < rows; i++) {
        for (j = 0; j < cols; j++) {
            if (visible[i][j] == 0) {
                printf(" # ");
            } else if (visible[i][j] == 1) {
                printf(" %d ", board[i][j]);
            } else if (visible[i][j] == 2) {
                printf(" F ");
            }
        }
        printf("\n");
    }
}

void reveal(int rows, int cols, int r, int c) {
    if (r < 0 || r >= rows || c < 0 || c >= cols || visible[r][c] != 0) {
        return;
    }
    visible[r][c] = 1;
    if (board[r][c] == 0) {
        reveal(rows, cols, r - 1, c - 1);
        reveal(rows, cols, r - 1, c);
        reveal(rows, cols, r - 1, c + 1);
        reveal(rows, cols, r, c - 1);
        reveal(rows, cols, r, c + 1);
        reveal(rows, cols, r + 1, c - 1);
        reveal(rows, cols, r + 1, c);
        reveal(rows, cols, r + 1, c + 1);
    }
}

int check_win(int rows, int cols, int mines) {
    int i, j, count = 0;
    for (i = 0; i < rows; i++) {
        for (j = 0; j < cols; j++) {
            if (visible[i][j] == 1) {
                count++;
            }
        }
    }
    return count == (rows * cols - mines);
}

void play_game(int rows, int cols, int mines) {
    int r, c, flag, won = 0, lost = 0;
    init_board(rows, cols, mines);
    while (!won && !lost) {
        print_board(rows, cols);
        printf("Enter row and column (e.g. 2 3): ");
        scanf("%d %d", &r, &c);
        printf("Enter 0 to reveal, 1 to flag: ");
        scanf("%d", &flag);
        if (flag == 0) {
            if (board[r][c] == 9) {
                lost = 1;
            } else {
                reveal(rows, cols, r, c);
                won = check_win(rows, cols, mines);
            }
        } else if (flag == 1) {
            visible[r][c] = 2;
        }
    }
    print_board(rows, cols);
    if (won) {
        printf("You won!\n");
    } else if (lost) {
        printf("You lost!\n");
    }
}

int main() {
    int rows, cols, mines;
    int level;
    printf("Choose a difficulty level:\n");
    printf("1. Beginner (9x9, 10 mines)\n");
    printf("2. Intermediate (16x16, 40 mines)\n");
    printf("3. Expert (16x30, 99 mines)\n");
    printf("4. Custom\n");
    printf("Enter your choice (1-4): ");
    scanf("%d", &level);
    switch (level) {
        case 1:
            rows = 9;
            cols = 9;
            mines = 10;
            break;
        case 2:
            rows = 16;
            cols = 16;
            mines = 40;
            break;
        case 3:
            rows = 16;
            cols = 30;
            mines = 99;
            break;
        case 4:
            printf("Enter number of rows: ");
            scanf("%d", &rows);
            printf("Enter number of columns: ");
            scanf("%d", &cols);
            printf("Enter number of mines: ");
            scanf("%d", &mines);
            break;
        default:
            printf("Invalid choice.\n");
            return 0;
    }
    play_game(rows, cols, mines);
    return 0;
}