有没有大佬能看一下这串代码Bug出在哪，一输入2 2 就直接重新开始游戏了

#include<stdio.h>
#include<time.h>
#define row 5
#define col 5
void menu()
{
    printf("       五子棋       \n");
    printf("   play:1  exit:0   \n");
    printf("                    \n");
}

void Initboard(char board[row][col], int x, int y)
{
	int i=0;
	int j=0;
    for (i = 0; i < row; i++)
    {
        for ( j = 0; j < col; j++)
        {
            board[i][j] = ' ';//这就是将数组的内容初始化成全是空格
        }
    }
}
void displayboard(char board[row][col], int x, int y)
{
	int i=0;
	int j=0;
	int k=0;
    for (i = 0; i < row; i++)
    {
        //1、打印一行数据
        for ( j = 0; j < col; j++)
        {
            printf(" %c ", board[i][j]);
            if (j < col - 1)//最后一列不需要再打印竖杠了
                printf("|");
        }
        printf("\n");
        if (i < row - 1)
        {
            for ( k = 0; k < col; k++)
            {
                printf("---");
                if (k < col - 1)
                    printf("|");
            }
            printf("\n");
        }
    }
}
void playermove(char board[row][col], int x, int y)
{
    int a;
    int b;
    printf("现在请玩家输入想要下的坐标：\n");
    printf("输入示例:1 1\n");
    while (1)
    {
        printf("请输入要下坐标\n");
        scanf("%d%d", &a, &b);
        if (a >= 1 && a <= row && b >= 1 && b <= col)//这样输入坐标才是有效的
        {
            if (board[a - 1][b - 1] == ' ')
            {
                board[a - 1][b - 1] = '$';
                break;
            }
            else
            {
                printf("该坐标已经下过了\n");
            }
        }
        else
        {
            printf("坐标无效，请重新输入：\n");
        }
    }
}
void computermove(char board[row][col], int x, int y)
{
    printf("现在轮到电脑走了\n");
    int c;
    int d;
    while (1)
    {
        c = rand() % row;//模一个3就得到0、1、2
        d = rand() % col;
        if (board[c][d] == ' ')
        {
            board[c][d] = '#';
            break;
        }
    }
}
int isfull(char board[row][col], int x, int y)//返回1，棋盘满了;返回0，棋盘没满
{
    int e=0;
    int f=0;
    for (e = 0; e < row; e++)
    {
        for (f = 0; f < col; f++)
        {
            if (board[e][f] == ' ')
                return 0;
        }
    }
    return 1;
}
char whowin(char board[row][col], int x, int y)
{
	int i=0;
	int j=0;
    //横三行
    for ( i = 0; i < row; i++)
    {
        if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][2] == board[i][3] && board[i][3] == board[i][4] && board[i][1] != ' ')//随便一个不等于空格就行
            return board[i][1];//随便返回一个就行
    }
    //竖三列
    for ( j = 0; j < col; j++)
    {
        if (board[0][j] == board[1][j] && board[1][j] == board[2][j] && board[2][j] == board[3][j] && board[3][j] == board[4][j] && board[1][1] != ' ')
            return board[1][j];
    }
    //两个对角线
    if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[2][2] == board[3][3] && board[3][3] == board[4][4] && board[1][1] != ' ')
        return board[1][1];
    if (board[4][0] == board[3][1] && board[3][1] == board[2][2] && board[1][3] == board[2][2] && board[1][3] == board[0][4] && board[2][2] != ' ')
        return board[2][2];
    //判断是否平局
    if (1 == isfull(board, row, col))
    {
        return 'Q';
    }
    return 'C';
}
void game()
{
    char ret = 0;
    //数组--存放走出的棋盘的信息
    char board[row][col] = { 0 };
    //希望数组的初始内容全是空格
    //初始化棋盘
    Initboard(board, row, col);
    //打印棋盘
    displayboard(board, row, col);
    //开始下棋
    while (1)
    {
        //先让玩家下棋，再电脑下棋
        playermove(board, row, col);
        displayboard(board, row, col);//下完一次打印一次棋盘
        //判断玩家是否赢了
        ret = whowin(board, row, col);
        if (ret != 'C')
        {
            break;
        }
        computermove(board, row, col);
        displayboard(board, row, col);
        //判断电脑是否赢了
        ret = whowin(board, row, col);
        if (ret != 'C')
        {
            break;
        }
    }
    if (ret == '$')
    {
        printf("Play Win!\n");
    }
    else if (ret == '#')
    {
        printf("Computer Win!\n");
    }
    else if (ret == 'Q') 
    {
        printf("平局\n");
    }
}
int main()
{
    int input = 0;
    srand((unsigned int)time(NULL));
    do
    {
        menu();
        printf("请输入：\n");
        scanf("%d", &input);
        switch (input)
        {
        case 1:
            printf("游戏:五子棋\n");
            game();
            break;
        case 0:
            printf("退出游戏\n");
            break;
        default:
            printf("输入错误,请重新输入!\n");
            break;
        }
    } while (input);
    return 0;
}