Question

我正在尝试创建一个运行有效彩票的程序。但是，我的主要方法遇到了问题。我收到以下错误消息，但不确定为什么！任何帮助，将不胜感激。 Lottery.java:171：错误：找不到符号

            for (j = 0; j <= numTix; j++) {
                 ^
  symbol:   variable j
  location: class Lottery
Lottery.java:171: error: cannot find symbol
            for (j = 0; j <= numTix; j++) {
                        ^
  symbol:   variable j
  location: class Lottery
Lottery.java:171: error: cannot find symbol
            for (j = 0; j <= numTix; j++) {
                                     ^
  symbol:   variable j
  location: class Lottery
Lottery.java:172: error: cannot find symbol
                currTicket = userTix[j];
                             ^
  symbol:   variable userTix
  location: class Lottery
Lottery.java:172: error: cannot find symbol
                currTicket = userTix[j];
                                     ^
  symbol:   variable j
  location: class Lottery
Lottery.java:176: error: cannot find symbol
                    bestRow = j;
                              ^
  symbol:   variable j
  location: class Lottery
Lottery.java:180: error: cannot find symbol
            for(int x = 0; x < userTix.length; x++) {
                               ^
  symbol:   variable userTix
  location: class Lottery
Lottery.java:181: error: cannot find symbol
                System.out.print(userTix[bestRow][x]);
                                 ^
  symbol:   variable userTix
  location: class Lottery

这是我认为错误来自的方法：

public static void main(String[] args) {
        Scanner scnr = new Scanner(System.in);
        int k;
        int n;
        int m;
        System.out.println("First, let's set up the game!");
        System.out.print("How many distinct numbers should the player pick? ");
        k = scnr.nextInt();
        System.out.println(k);
        if (k < 1) {
            System.out.print("Error - number must be greater than or equal to 1! Please try again. ");
            k = scnr.nextInt();
            System.out.print(k);
        }
        System.out.print("Ok. Each of those " + k + " numbers should range from 1 to what? ");
        n = scnr.nextInt();
        System.out.print(n);
        if (n <= k) {
            System.out.print("Error - number must be greater than or equal to " + k + ". Try again. ");
            n = scnr.nextInt();
            System.out.print(n);
        }
        System.out.print("Ok. And finally, the bonus number should range from 1 to what? ");
        m = scnr.nextInt();
        System.out.println(m);
        if (m < 1) {
            System.out.print("Error - number must be greater than or equal to 1. Try again. ");
            m = scnr.nextInt();
            System.out.println(m);
        }
        System.out.println("There are " + numPossibleTickets(k, n, m) + " possible tickets in this game.");
        double chanceWin = 1.0 / numPossibleTickets(k, n, m);
        System.out.println("Each ticket has a " + chanceWin + " chance of winning the Jackpot. Let's play, good luck!");
        System.out.print("How many tickets would you like to buy? ");
        int numTix = scnr.nextInt();
        System.out.println(numTix);
        if (numTix < 1) {
            System.out.print("Error - must buy at least 1 ticket. Try again. ");
            numTix = scnr.nextInt();
            System.out.print(numTix);
        }
        for (int i = 1; i <= numTix; i++) {
            System.out.println("Ticket #" + i + "of " + numTix);
            getPlayerNumbers(k, n);
            System.out.println("Your tickets so far: ");
            int userTix[][] = new int[numTix][k];
            userTix[i - 1] = getPlayerNumbers(k, n);
            System.out.println(userTix + " Bonus: " + getBonusNum(m));
        }
        System.out.println("The moment of truth has arrived! Here are the drawn numbers: ");
        int[] drawnNums = getDrawnNumbers(k, n);
        System.out.println(drawnNums + " Bonus: " + randBonusNum(m));
        int randBonus = randBonusNum(m);
        boolean bonusCheck = bonusMatch(m, randBonus);
        if (numTix > 1) {
            int tempMatches = 0;
            int max = -1;
            int bestRow = 0;
            int[]currTicket = new int[k];
            for (j = 0; j <= numTix; j++) {
                currTicket = userTix[j];
                tempMatches = countMatches(currTicket, drawnNums);
                if (max < tempMatches) {
                    max = tempMatches;
                    bestRow = j;
                }
            }
            System.out.println("Here's your best ticket: ");
            for(int x = 0; x < userTix.length; x++) {
                System.out.print(userTix[bestRow][x]);
            }
            System.out.println(" Bonus: " + m);
            System.out.println("It matched " + max + "/" + k + "drawn numbers.");
            if (bonusCheck = true) {
                System.out.println("It did match the bonus number.");
            }
            else {
                System.out.println("It did not match the bonus number.");
            }
            if (max == k * 1 && bonusCheck == true) {
                System.out.println("WOOHOO! JACKPOT!!");
            }
            else {
                System.out.println("Sorry, no jackpot this time. Did you really expect anything else?");
            }
        }
    }

同样，我很确定我声明了变量，所以我不确定问题出在哪里。如果我调用的任何方法似乎是问题的一部分，请告诉我，我也将发布它们。如果您在我的代码中看到任何其他错误，请随时告诉我！

Answer 1

好吧，您没有j变量（并且userTix很快就超出了范围）。就那么简单。试试

int k;
int n;
int m;
int j;
int[][] userTix; // int userTix[][] is legal, but harder to read (IMO)

然后更改

int userTix[][] = new int[numTix][k];

到

userTix = new int[numTix][k];

另外，对于循环变量，您可以使用（对于j）

for (int j = 0; j < numTix; j++) {

请注意，从0开始意味着您可能想要<（而不是<=）。

如何解决此“找不到符号”错误？

1 个答案: