Java 在 Do 循环中找不到符号错误

Question

在此代码的最后一行，我收到错误，无法找到符号钱包。任何帮助将不胜感激。

int money = money();
boolean again = again("Ready");
do {
    int bet = bet(money);
    int wallet = wallet(bet);
    Deck deck = dealDeck();
    int com = comDeal(deck);
    int user = userDeal(deck);
    int userTotal = userHit(user, deck);
    int comTotal = comHit(com, deck, userTotal);
    int winner = whoWon(userTotal, comTotal);
    again = again("Play again");
}
while (again && wallet > 0);

Answer 1

int wallet 是在 do-while 循环内定义的。不允许在其外部使用它，就像在 while 的情况下一样，因为它超出了范围。

只需在 do-while 循环之前声明此变量即可:

int money = money();
int wallet = 0;
boolean again = again("Ready");
do {
    //rest of code here...
} while (<condition>);