用C语言编写判断五子棋输赢的程序

好的，以下是用C语言编写判断五子棋输赢的程序：

#include <stdio.h>

#define SIZE 15 // 棋盘大小

int board[SIZE][SIZE]; // 棋盘
int player = 1; // 当前下棋者

int is_win(int row, int col) {
    int i;
    int count = 1; // 连续棋子数量

    // 判断横向
    for (i = col - 1; i >= 0 && board[row][i] == player; i--) {
        count++;
    }
    for (i = col + 1; i < SIZE && board[row][i] == player; i++) {
        count++;
    }
    if (count >= 5) {
        return 1;
    }

    // 判断纵向
    count = 1;
    for (i = row - 1; i >= 0 && board[i][col] == player; i--) {
        count++;
    }
    for (i = row + 1; i < SIZE && board[i][col] == player; i++) {
        count++;
    }
    if (count >= 5) {
        return 1;
    }

    // 判断左上到右下斜线
    count = 1;
    for (i = row - 1, j = col - 1; i >= 0 && j >= 0 && board[i][j] == player; i--, j--) {
        count++;
    }
    for (i = row + 1, j = col + 1; i < SIZE && j < SIZE && board[i][j] == player; i++, j++) {
        count++;
    }
    if (count >= 5) {
        return 1;
    }

    // 判断左下到右上斜线
    count = 1;
    for (i = row + 1, j = col - 1; i < SIZE && j >= 0 && board[i][j] == player; i++, j--) {
        count++;
    }
    for (i = row - 1, j = col + 1; i >= 0 && j < SIZE && board[i][j] == player; i--, j++) {
        count++;
    }
    if (count >= 5) {
        return 1;
    }

    return 0;
}

int main() {
    int row, col;

    // 初始化棋盘
    for (row = 0; row < SIZE; row++) {
        for (col = 0; col < SIZE; col++) {
            board[row][col] = 0;
        }
    }

    // 开始下棋
    while (1) {
        printf("Player %d's turn.\n", player);
        printf("Enter row and column: ");
        scanf("%d %d", &row, &col);

        // 判断位置是否合法
        if (row < 0 || row >= SIZE || col < 0 || col >= SIZE || board[row][col] != 0) {
            printf("Invalid move. Try again.\n");
            continue;
        }

        // 下棋
        board[row][col] = player;

        // 判断是否获胜
        if (is_win(row, col)) {
            printf("Player %d wins!\n", player);
            break;
        }

        // 切换下棋者
        player = (player == 1) ? 2 : 1;
    }

    return 0;
}

这个程序实现了一个简单的五子棋游戏，并且可以判断输赢。不过需要注意的是，这个程序并没有考虑禁手规则或其他特殊规则。