如何在C++中保存对数组的更改[closed]

提问者：小点点

如何在C++中保存对数组的更改[closed]

我得做一个程序，读取座位数，并将其存储在二维数组中。空座位是一个标签，如果用户买了一个座位，它就变成了*。奇数排有15个座位，甚至有20个。当我购买一个座位时，它把*放在座位上，但当我购买另一个座位时，它把它移除，把*放在新购买的座位上。我怎样才能使它省下它在每个座位上打印的*。

全球

char ab[15][20];

我的座位打印代码:

void Show_Chart()
{


    cout << "\tSeats" << endl;
    cout << "       0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19\n";

    for (int i = 0; i < 15; i++) {
        for (int j = 0; j < 20; j++) {
            ab[i][j] = EMPTY;
            if (i % 2 && j == 14) // 0 is false, 1 is true
            {
                break;
            }
            if (i == row2 && j == column2) // assuming these numbers start from 0
            {
                ab[i][j] = '*';
            }
        }
    }
    for (int i = 0; i < 15; i++) {
        cout << endl
             << "Row " << (i + 1);
        for (int j = 0; j < 20; j++) {

            cout << "  " << ab[i][j];
            if (i % 2 && j == 14) // 0 is false, 1 is true
            {
                break;
            }
            if (i == row2 && j == column2) // assuming these numbers start from 0
            {
                ab[i][j] = '*';
            }
        }
    }
}

我的购买座位代码:

    cout << "Please select the row you would like to sit in: ";
    cin >> row2;
    cout << "Please select the seat you would like to sit in: ";
    cin >> column2;
    if (ab[row2][column2] == '*') {
        cout << "Sorry that seat is sold-out, Please select a new seat.";
        cout << endl;
    }
    else {
        cost = price[row2] + 0;

        cout << "That ticket costs: " << cost << endl;
        cout << "Confirm Purchase? Enter (1 = YES / 2 = NO)";
        cin >> answer;
        seat = seat - answer;
        seat2 += answer;

        if (answer == 1) {
            cout << "Your ticket purchase has been confirmed." << endl;
            ab[row2][column2] = '*';
            total = total + cost;
            cout << "Would you like to look at another seat? (1 = YES / 2 = NO)";
            cin >> Quit;
        }
        else if (answer == 2) {
            cout << "Would you like to look at another seat? (1 = YES / 2 = NO)";
            cout << endl;
            cin >> Quit;
        }

当我购买第2排和座位2时，它会显示这一点https://gyazo.com/0d8bd7ed02e969110db47b428c512f24

但当我购买第2排第3座位时，它并不能保存前一次购买的座位，我希望它能同时保存这两个座位。 https://gyazo.com/f865ba7145d1fafac246836975f2ee00

共1个答案

匿名用户

您有一个全局数组:

char ab[15][20];

但是，在SHOW_CHART中，您还有一个局部变量:

void Show_Chart()
{
    char ab[15][20];   // <-- shadows global
    // ...
}

这个局部隐藏了全局的ab，因此这个函数根本没有引用全局的ab。只需删除这一行，以引用函数中的全局ab。

如何在C++中保存对数组的更改[closed]

共1个答案

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