c++ - 改变数组的值

Question

我是 C++ 新手，因为我的第一个任务是制作一个黑白棋游戏，但是在 playGame 函数中玩家的输入时我遇到了问题。所以当我输入 x 和 y 时，它会将板数组 [x][y] 的值从空或 '' 更改为 'B'。我也不知道如何将数组引用到函数。如果这些问题对某些人来说很愚蠢，我很抱歉，但请原谅我，我在这里自学。谢谢

#include <iostream>
#include <string>
using namespace std;
void displayTop();
void displayAlpha();
void displayNum();
int displayMenu();
void displayBoard();
char displayHelp();
void playGame();
int num = 8;
char board [8][8] = {

' ',' ',' ',' ',' ',' ',' ',' ',
' ',' ',' ',' ',' ',' ',' ',' ',
' ',' ',' ',' ',' ',' ',' ',' ',
' ',' ',' ','W','B',' ',' ',' ',
' ',' ',' ','B','W',' ',' ',' ',
' ',' ',' ',' ',' ',' ',' ',' ',
' ',' ',' ',' ',' ',' ',' ',' ',
' ',' ',' ',' ',' ',' ',' ',' ',

};

int main() {
    int choice = displayMenu();
    switch (choice) {
        case 1:
            displayBoard();
            break;
        case 2:
            displayHelp();
            break;
        default:
            cout << "Please enter a valid choice." << endl;
            break;
    }
    playGame();

}
void displayBoard(){


    displayTop();

    for (int row = 0; row < 8; row++){
        displayNum();
        cout << "   |";

        for (int column = 0; column < 8; column++){
            cout << board[row][column] << "   |";
        }
        cout << endl;
        displayTop();

    }

    displayAlpha();

}

void displayTop(){
    cout << "    ";
    for (int i = 0; i < 8; i++){
        cout << "+----";
    }
    cout << endl;

}

void displayAlpha(){
    cout << "   ";
    for( char i = 'a'; i <= 'h'; i++ ) {
    cout << "    " << i ;
    }
}

void displayNum(){
    if (num > 0) {
        cout << num;
        num = num - 1;

    }
}

int displayMenu(){
    int answer = 0;
    cout << "Othello\n\n"
    << "1.New Game\n2.Help\n3.Quit\nYour Choice: ";
    cin >> answer;
    system("clear");
    return answer;

}

char displayHelp(){
    char answer = ' ';
    cout << "How to play Othello\n\nThe object of the game is to have     the majority of your colour discs on the board at the end of the     game.\n\nInput the cell where you want to place your disc in the form of     (a-z 1-8) without the bracket and includng the space.\n\nThe one with the     most discs wins!!!!\n\nSo, are you ready to play? (y or n)\n\nYour Choice:    ";
    cin >> answer;
    if (answer == 'y')
        displayBoard();

    return answer;
}

void playGame(){
    int plW = 2;
    int plB = 2;
    int x = 0;
    int y = 0;
    char player = 'B';
    for(;;){
        cout << "\n\nScore: W = " << plW << " B = " << plB;
        cout << "\nPlayer: " << player;
        cout << "\nPlease make your move : ";
        cin >> x >> y;
        cout << endl;

        if (x < 9 && y < 9) {
            board[x-1][y-1] = player;
            displayBoard();
        } else {
            cout << "Invalid Input";
        }

        if (player == 'B') {
            plB++;
            player = 'W';

        } else {
            plW++;
            player = 'B';
        }
    }

}

Answer 1

要存储来自 cin 的输入并将其保存在游戏板中，您需要 playGame() 函数来引用游戏板。您可以在 main 之前声明您的游戏板数组以使其在范围内为全局，这将允许您在此文件中的任何函数中引用它。

char board[8][8] = {

{' ',' ',' ',' ',' ',' ',' ',' ',}
{' ',' ',' ',' ',' ',' ',' ',' ',}
{' ',' ',' ',' ',' ',' ',' ',' ',}
{' ',' ',' ','W','B',' ',' ',' ',}
{' ',' ',' ','B','W',' ',' ',' ',}
{' ',' ',' ',' ',' ',' ',' ',' ',}
{' ',' ',' ',' ',' ',' ',' ',' ',}
{' ',' ',' ',' ',' ',' ',' ',' ',}

};

int main() {
int choice = displayMenu();
switch (choice) {
    case 1:
        displayBoard();
        break;
    case 2:
        displayHelp();
        break;
    default:
        cout << "Please enter a valid choice." << endl;
        break;
}
playGame();

}

然后在playGame

void playGame(){
int plW = 0;
int plB = 0;
int x = 0;
int y = 0;
char player = 'B';

cout << "\n\nScore: W = " << plW << " B = " << plB;
cout << "\nPlayer: " << player;
cout << "\nPlease make your move : ";
cin >> x >> y;

board[x][y]=player;
}

显示板：

displayBoard(){

    for (int row = 0; row < 8; row++){
        cout << "   |";

        for (int column = 0; column < 8; column++){
             cout << board[row][column] << "   |";
        }
        cout << endl;
    }
}

不确定这里的格式，我认为您可以自己修复。

最后，您需要重复调​​用 playGame() 和 diplayBoard()，因此将您的 switch 语句放入带有 break 条件的 while 循环中。这意味着您将继续查询玩家的输入（记得切换玩家），读取他的动作并将其放入您的数组中，然后显示棋盘。当用户键入 Exit 或类似的内容时，退出 while 循环。