三子棋问题出现bug，找不到错误

问题遇到的现象和发生背景

问题相关代码，请勿粘贴截图

运行结果及报错内容

我的解答思路和尝试过的方法

我想要达到的结果：帮忙找一下bug在哪里，我人麻了

```c
#define _CRT_SECURE_NO_WARNINGS
#include "game.h"

void initboard(char board[ROW][COL], int row, int col) {
    int i = 0;
    int j = 0;
    for (i = 0; i< row; i++)
    {
        for (j = 0; j < col; j++)
        {
            board[i][j] = ' ';
        }
    }
}
void Displayboard(char board[ROW][COL], int row, int col)
{
    int i = 0;
    for (i = 0; i < row; i++)
    {
        for (int j = 0; j < col; j++)
        {
            printf(" %c ",board[i][j]);
            if (j < col - 1)
            printf("|");
        }
        printf("\n");
        if (i < row - 1)
        {
            for (int j = 0; j < col; j++)
            {
                printf("---");
                if (j < col - 1)
                    printf("|");
            }
            printf("\n");
        }
    }
}
void playermove(char board[ROW][COL], int row, int col)
{
    printf("玩家走>\n");
    printf("请输入坐标>:");
    int x = 0;
    int y = 0;
    while (1) 
    {
        ;
        scanf("%d%d", &x, &y);
        //判断x，y坐标的合法性；
        if (x >= 1 && x <= row && y >= 1 && y <= col)
        {
            if (board[x - 1][y - 1] == ' ')
            {
                board[x - 1][y - 1] = '*';
                
                break;

            }
            else 
                printf("该坐标已被占用\n");
            
        }
        else
            printf("非法坐标，请重新输入\n");
        
    }
}
void computermove(char board[ROW][COL], int row, int col)
{
    printf("电脑走>:\n");
    int x = 0;
    int y = 0;
    while (1) {
        x = rand() % row;
        y = rand() % col;
        if (board[x][y] == ' ')
        {
            board[x][y] = '#';
            break;
        }
    }
}
int isfull(char board[ROW][COL], int row, int col)
{
    int i = 0;
    int j = 0;
    for (i = 0; i < row; i++) {
        for (j = 0; j < col; j++) 
        {
            if (board[i][j] = ' ')
                return 0;
        }
    }
    return 1;
}
char iswin(char board[ROW][COL], int row, int col)
{
    int i = 0;
    for (i = 0; i < row; i++)
    {
        if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][0]!= ' ') 
        {
            return board[i][1];
        }
    }
    for (i = 0; i < col; i++)
    {
        if (board[0][i] == board[1][i] && board[1][i] == board[2][i]&&board[i][0]!=' ') 
        {
            return board[0][i];
        }
    }
    if (board[0][0] == board[1][1] && board[0][0] == board[2][2] && board[0][0] != ' ')
        return board[0][0];
    if (board[0][2] == board[1][1] && board[0][2] == board[2][0] && board[0][2] != ' ')
        return board[0][2];
    if (1 == isfull(board, ROW, COL))
    {
        return 'Q';
    }
    return 'C';

```c
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include "game.h"

void menu(){
    printf("************************\n");
    printf("****1.play     0.exit***\n");
    printf("************************\n");
    
}
void game()
{
    char ret = 0;
    char board[ROW][COL] = { 0 };
    initboard(board, ROW, COL);
    Displayboard(board, ROW, COL);
    while (1)
    {

        playermove(board, ROW, COL);
        Displayboard(board, ROW, COL);
        ret = iswin(board, ROW, COL);
        if (ret != 'C')
        {
            break;
        }
        computermove(board, ROW, COL);
        Displayboard(board, ROW, COL);
        ret = iswin(board, ROW, COL);
        if (ret != 'C')
        {
            break;
        }
    }
        if (ret == '*')
        {
            printf("玩家赢\n");
        }
        else if (ret == '#') {
            printf("电脑赢\n");
        }
        else {
            printf("平局\n");
        }
    }


void test(){
    srand((unsigned int)time(NULL));
    int input = 0;
    do
    {
        menu();
        printf("请选择:>");
        scanf("%d", &input);
        switch (input)
        {
        case 1:
            printf("三子棋\n");
            game();
            break;
        case 0:
            printf("退出游戏\n");
            break;
        default:
            printf("选择错误，请重新选择\n");
            break;
        }
    }
        while (input);

}
int main() {
    test();
    return 0;
}

专业挖坑50年

#define ROW 3
#define COL 3
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void initboard(char board[ROW][COL], int row, int col);
void Displayboard(char board[ROW][COL], int row, int col);
void computermove(char board[ROW][COL],int row ,int col);
void playermove(char board[ROW][COL], int row, int col);
char iswin(char board[ROW][COL], int row, int col);