随机数生成器使用++获取错误

Question

我正在制作随机数生成器，然后让用户猜出数字。然后，计算机将告诉用户该号码是否正确以及猜测与虚拟号码的距离。当我编译：

public static void guessNumber()
{
    //Asks for guess of the number. Prints whether the guess is above or below randomNumber.
    Scanner reader = new Scanner(System.in);
    numberOfTries = 0;
    while(userGuess != randomNumber){
        System.out.println("Guess the number ");
        int userGuess = reader.nextInt();
        if (userGuess == randomNumber) {
            int numberOfGuesses++;
            System.out.println("Correct! It took you " + numberOfTries + " tries to find my numnber");
        } else {
            int distanceFromNumber = Math.abs(randomNumber - userGuess);
            int numberOfGuesses++;
            System.out.println("Incorrect! The number that you guessed is " + distanceFromNumber + "numbers away from my number ");
       }
   }

我收到此错误：

C:\!!VHSJava\Projects\random.java:47: error: ';' expected
     int numberOfGuesses++;
                        ^
C:\!!VHSJava\Projects\random.java:51: error: ';' expected
     int numberOfGuesses++;
                        ^

我已经尝试将其更改为numberOfGuesses + = 1，但是出现了同样的错误。

Answer 1

int numberOfGuesses++;

声明时不能增加值。

在

之前定义你的变量

 int numberOfGuesses =0

稍后递增

numberOfGuesses++

Answer 2

您需要先声明变量然后再使用它。两者都不能在同一个语句中一起完成，因为numberOfGuesses甚至没有值来增加它。

int numberOfGuesses = 0; // declare it before the if
...
numberOfGuesses++; // use it in the if

Answer 3

在更高级别的范围内声明整数，然后递增它：

int numberOfGuesses = 0;

//...
    numberOfGuesses++;