c - 与井字游戏斗争

Question

我用 C 语言编写了一个程序，该程序在运行时应该允许用户玩井字游戏 - 或数字和十字，无论是针对计算机还是针对其他用户。我几乎完成了它，它打印出的网格非常好。但是，当我去输入我想在哪一行/列中放置符号时，它没有插入符号，而是删除了网格中的一个空格，错误地对齐了它。我试图在主要方法中放置一个循环，该循环用空格填充网格以尝试防止空值。如果有人可以提出任何建议，将不胜感激。提前致谢!

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

    void user_prompt();
    void clear_board(char gameBoard[3][3]);
    void display_board(char gameboard[3][3]);
void user_move(char gameBoard[3][3]);
void computer_move(char gameBoard[3][3]);
int detect_win(char gameBoard[3][3]);

int gameMode;
char symbol1;
char symbol2;
char nickname1[10];
char nickname2[10] = "TicTacBot";
char gameBoard[3][3];
char playerTurn[10];

int main(void){
    int i, j;
    char gameBoard [3][3];

    clear_board(gameBoard);

    for(int i = 0; i < 3; i++) {
        for(int j = 0; j < 3; j++) {
            gameBoard[i][j] = ' ';
        }
    }
    i = 0;
    j = 0;

    user_prompt();
    display_board(gameBoard);

    if(gameMode == 2){
        for(i = 0; i < 9; i++){
            user_move(gameBoard);
            display_board(gameBoard);
            if(detect_win(gameBoard) == 1){
                printf("The winner is %s!!!\n", nickname1);
            }

            if(detect_win(gameBoard) == 2){
                printf("The winner is %s!!!\n", nickname2);
            }
        }
    }

    else{
        user_move(gameBoard);
        display_board(gameBoard);
        for(i = 0; i < 4; i++){
            printf("TicTacBot's move.\n");
            computer_move(gameBoard);
            display_board(gameBoard);
            if(detect_win(gameBoard) == 1){
                printf("The winner is %s!!!\n", nickname1);
            }
            user_move(gameBoard);
            display_board(gameBoard);
            if(detect_win(gameBoard) == 1){
                printf("The winner is %s!!!\n", nickname2);
            }
        }
    }
    if(detect_win(gameBoard) == 0){
        ("The game ended in stalemate!\n");
    }



    return 0;
}

/*
    Prompts the user to enter a nickname, what symbol they would like to use, and whether they'd rather play against the computer or another user.
*/

void user_prompt(void){

    printf("Please choose whether you would rather play against the computer (enter '1'),or another user (enter '2'): \n");
    scanf("%d", &gameMode);
    getchar();

    while(gameMode != 1 && gameMode != 2){
        printf("Please enter a valid digit: \n");
        scanf("%d", &gameMode);
        getchar();
    }

    if(gameMode == 1){
        printf("Please choose whether you would rather play as 'X' (enter 'x') or as 'O' (enter 'o'): \n");
        scanf(" %c", &symbol1);
        getchar();
        if(symbol1 == 'x') {
            symbol2 == 'o';
        }
        else{
            symbol2 == 'x';
        }
    }

    else{
        printf("Player 1, would you like to play as 'X' (enter 'x') or as 'O' (enter 'o'): \n");
        scanf(" %c", &symbol1);
        getchar();

    while(symbol1 != 'x' &&  symbol1 != 'o'){
        printf("Please enter a valid symbol: \n");
        scanf(" %c", &symbol1);
        getchar();
    }

        if(symbol1 == 'x'){
            symbol2 == 'o';
        }

        else{
            symbol2 == 'x';
        }   
    }

    if(gameMode == 1){
        printf("Please enter a nickname: \n");
        fgets(nickname1, 10, stdin);
        getchar();
    }
    else{
        printf("Please enter a nickname for player 1: \n");
        fgets(nickname1, 10, stdin);
        getchar();
        printf("Please enter a nickname for player 2: \n");
        fgets(nickname2, 10, stdin);
        getchar();
    }


}

/*
    Resets the game board.
*/

void clear_board(char gameBoard[3][3]){
    for(int i = 0; i < 3; i++){
        for(int j = 0; j < 3; j++){
            gameBoard[i][j] = 0;
        }
    }
}

/*
    Displays the game board and all symbols within it.
*/

void display_board(char gameBoard[3][3]){
    for(int i = 0; i < 3; i++){
        for(int j = 0; j < 3; j++){
            printf(" %c ", gameBoard[i][j]);
            if(j == 2){
                printf("\n");
            }
            if(j != 2){
                printf("|");
            }
        }
        if(i != 2){
            printf("---+---+---\n");
        }

    }

}

/*
    Takes input of a position on the board from the user, then places the user's symbol into that space on the game board.
*/

void user_move(char gameBoard[3][3]){
    int row;
    int column;
    if(playerTurn == nickname1){
    printf("Would you like to enter your %c in row 1, 2 or 3? \n", symbol1);
    scanf("%d", &row);
    getchar();

    printf("Would you like to enter your %c in column 1, 2 or 3? \n", symbol1);
    scanf("%d", &column);
    getchar();

    }
    else{
    printf("Would you like to enter your %c in row 1, 2 or 3? \n", symbol2);
    scanf("%d", &row);
    getchar();

    printf("Would you like to enter your %c in column 1, 2 or 3? \n", symbol2);
    scanf("%d", &column);
    getchar();

    }

    if(row < 1 || row > 3){
        printf("Please enter a valid row number: \n");
        scanf("%d", &row);
        getchar();
    }

    if(column < 1 || column > 3){
        printf("Please enter a valid column number: \n");
        scanf("%d", &row);
        getchar();
    }

    if(gameBoard[row-1][column-1] != ' '){  
        printf("The position you entered is already taken. Try again! \n");
        display_board(gameBoard);
        user_move(gameBoard);
    }

    else if(gameBoard[row-1][column-1] != ' '){
        printf("The position you entered is already taken. Try again! \n");
        display_board(gameBoard);
        user_move(gameBoard);
    }   

    else{
        if(playerTurn == nickname1){
            gameBoard[row-1][column-1] = symbol1;
        }
        else{
            gameBoard[row-1][column-1] = symbol2;
        }
    }
    printf("%c", symbol2);

    if(gameMode == 2){
        return;
    }

    if(strcmp(playerTurn, nickname1)==0){
        strcpy(playerTurn, nickname2);
    }
    else if(strcmp(playerTurn, nickname2)==0){
        strcpy(playerTurn, nickname1);
    }
}

/*
    Automates a strategic move from the computer, aiming to win the game, or at the least prevent the user from winning
*/


void computer_move(char gameBoard[3][3]){
    int row;
    int column;
    int endTurn = 0;

    row = rand() % 3 + 0;
    column = rand() % 3 + 0;

    if(gameBoard[row][column] != symbol1 && gameBoard[row][column] != symbol2){
        gameBoard[row][column] = symbol2;
        endTurn = 1;
    }

}

/*
    Detects a win on the game board. Checks if there are three identical symbols in a row, or if there are no more spaces on the game board. 
*/

int detect_win(char gameBoard[3][3]){
    for(int row = 0; row < 3; row++){
        if(gameBoard[row][0] == gameBoard[row][1] && gameBoard[row][1] == gameBoard[row][2]){
            if(gameBoard[row][0] == symbol1){
                return 1;
            }
            if(gameBoard[row][0] == symbol2){
                return 2;
            }
        }
    }

    for(int column = 0; column < 3; column++){
        if(gameBoard[0][column] == gameBoard[1][column] && gameBoard[1][column] == gameBoard[2][column]){
            if(gameBoard[0][column] == symbol1){
                return 1;
            }
            if(gameBoard[0][column] == symbol2){
                return 2;
            }
        }
    }

    if(gameBoard[0][0] == gameBoard[1][1] && gameBoard[1][1] == gameBoard[2][2]){
        if(gameBoard[1][1] == symbol1){
            return 1;
        }
        if(gameBoard[1][1] == symbol2){
            return 2;
        }
    }

    if(gameBoard[0][2] == gameBoard [1][1] && gameBoard[1][1] == gameBoard[2][0]){
        if(gameBoard[1][1] == symbol1){
            return 1;
        }
        if(gameBoard[1][1] == symbol2){
            return 2;
        }
    }
    return 0;


}

Answer 1

有一个小的逻辑错误:

在第 98、101、117 和 121 行(可能还有其他地方 - 请检查)您使用了 ==(相等性检查运算符)而不是 =用于赋值。

例如，

symbol2 == 'o';

应替换为

symbol2 = 'o';

因此，它只是检查是否相等，丢弃结果，然后继续； symbol2 没有任何变化。