三子棋不能出来平局情况，整了很久都搞不懂哪里出错了，平局情况总是再调用ComputerMove这段函数

Question

#include "game.h"
void menu()
{
    printf("                   *****************************\n");
    printf("                   *********1.开始游戏**********\n");
    printf("                   *********0.退出游戏**********\n");
    printf("                   *****************************\n");
}
void game() //存储数据，需要二维数组
{
    char board[ROW][COL];
    //初始化棋盘-空格↓
    InitBoard(board, ROW, COL);
    //打印棋盘-打印数组内容↓
    DisplayBoard(board,ROW,COL);
    //开始下棋
    char ret = 0;
    while (1)
    {
        PlayerMove(board, ROW, COL); //玩家下棋
        ret = IS_win(board, ROW, COL);
        if (ret != 'C')
            break;
        DisplayBoard(board, ROW, COL); //显示
        ComputerMove(board, ROW, COL);//电脑下棋
        ret = IS_win(board, ROW, COL);
        if (ret != 'C')
            break;
        DisplayBoard(board, ROW, COL);//显示
    }
    if (ret == '*')
    {
        printf("玩家赢了！\n");
    }
    else if (ret == '#')
    {
        printf("电脑赢了！\n");
    }
    else
    {
        printf("本次游戏平局！\n");
    }
    DisplayBoard(board, ROW, COL);
}
int main()
{
    srand((unsigned int)time(NULL));
    int input = 0;
    do
    {
        menu();
        printf("请选择:>");
        scanf("%d", &input);
        switch (input)
        {
        case 1:
            printf("三子棋游戏\n");
            game();
            break;
        case 0:
            printf("退出游戏\n");
            break;
        default:
            printf("选择错误，重新选择:\n");
            break;
        }
    } while (input);
    return 0;
}

#include<stdio.h> //头文件的包含
#include<stdlib.h>
#include<time.h>
#define ROW 3
#define COL 3
//函数声明
void InitBoard(char board[ROW][COL], int row, int col);//初始化棋盘
void DisplayBoard(char board[ROW][COL], int row, int col); //打印棋盘
void PlayerMove(char board[ROW][COL], int row, int col); //玩家下棋
void ComputerMove(char board[ROW][COL],int row, int col);//电脑下棋
char IS_win(char board[ROW][COL], int row, int col);

#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++)
    {
        int j = 0;
        for (j = 0; j < col; j++)
        {
            printf(" %c ", board[i][j]);
            if (j < col - 1)
            printf("|");
        }
        printf("\n");
        if (i < row - 1)
        {
            int j = 0;
            for (j = 0; j < col; j++)
            {
                printf("---");
                if(j<col-1)
                printf("|");
            }
            printf("\n");
        }
    }
}
void PlayerMove(char board[ROW][COL], int row, int col)
{
    int x = 0;
    int y = 0;
    printf("请选择下棋的坐标:>");
    while (1)
    {
        scanf("%d %d", &x, &y);
        if (x >= 1 && x <= row && y >= 1 && y <= col)
        {
            if (board[x-1][y-1] == ' ')
            {
                board[x - 1][y - 1] = '*'; //假定下的棋为*
                break; //下完棋进入对手回合，则跳出
            }
            else
            {
                printf("该格已被占用，请重新输入:>");
            }
        }
        else
        {
            printf("坐标错误，请重新输入:>");
        }
    }
}
void ComputerMove(char board[ROW][COL], int row, int col)
{
    printf("本回合是电脑走:>\n");
    while (1)
    {
        int x = rand() % row;
        int 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 IS_win(char board[ROW][COL], int row, int col)
{
    int i = 0;
    //判断行
    for (i = 0; i < row; i++)
    {
        if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][1] != ' ')
            return board[i][0];
    }
    //判断列
    for (i = 0; i < col; i++)
    {
        if (board[0][i] == board[1][i] && board[1][i] == board[2][i] && board[1][i] != ' ')
            return board[1][i];
    }
    //判断对角线
    if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[1][1] != ' ')
    {
        return board[1][1];
    }
    if (board[0][2] == board[1][1] && board[1][1] == board[2][0] && board[1][1] != ' ')
    {
        return board[1][1];
    }
    //判断平局
    int ret = IsFull(board, row, col);
    if (ret == 0)
    {
        return 'C';
    }
    return 'Q';
}

Answer 1

IsFull()函数中

 if (board[i][j] != ' ');  这里if()后面多了分号,并且应该是==

改成

if (board[i][j] == ' ') 

你题目的解答代码如下：

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] != ' ');
            if (board[i][j] == ' ')  //这里多了分号,并且应该是==
            {
                return 0;
            }
        }
    }
    return 1;
}

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