c++ - 卡在 while 循环中的 if 语句中

Question

谁能发现我在这个循环中的错误？阅读回复后，我似乎陷入了 If 语句。此外，在条件不为真的情况下插入 break 以退出循环似乎会引发错误:“Expected primary expression before else”

代码:

while (rowNum > (FC_Row))
{
    cout << "That row is not located in our first class section. Would you like to change your class so you can sit in that row (Y/N)?" << endl;
    cin >> reply;
    reply = toupper(reply);
    while (reply != 'Y' && reply !='N')
    {
        cin.clear();
        while(cin.get()!='\n');
        cout << "Please indicate your answer with Y (yes) or N (no)." << endl;
        cout << "try again:" << endl;
        cin >> reply;
        reply = toupper(reply);
    }
    if (reply = 'Y')
        ticketType = 'E';
    break; // I want this to exit the while loop, I get a syntax error from this break.
    else
        cout << "Then choose a row numbered 1-" << (FC_Row) << endl;
    cin >> rowNum;
}

Answer 1

您需要大括号，并在 if 条件中将 = 替换为 ==:

if (reply == 'Y')
{
    ticketType = 'E';
    break;
}
else
{
    cout << "Then choose a row numbered 1-" << (FC_Row) << endl;
    cin >> rowNum;
}