Question

private int repetition;

  public int repetition(int sum){
    Scanner sc = new Scanner(System.in);

    System.out.println("Enter 5 numbers greater than 0: ");

    for (int i = 0; i < number.length; i++){

      System.out.println("Please enter number: ");
      number[i] = sc.nextInt();

      if (number[i] < 0){
        System.out.println("Please enter a number greater than 0");
        i--;
        sum -= number[i];
      }
      sum += number[i];
    }
    return int sum;
  }
  repetition(sum);
}

我收到的错误是说我的方法声明无效，但我似乎无法弄清楚我做错了什么。

Answer 1

请阅读以上评论

我修改了您的代码以使其有效，并添加了注释内联

// you need a `main` as the entry point to your program
public static void main(String... args) {
    // my class is called `Main` so I instantiate it and call your method
    System.out.println("the sum is " + new Main ().repetition());

}

// no parameters necessary
public int repetition(){
    Scanner sc = new Scanner(System.in);

    // keep a sum
    int sum = 0;
    System.out.println("Enter 5 numbers greater than 0: ");

    for (int i = 0; i < 5; i++){  // loop five times

      System.out.println("Please enter number: ");
      // store into a local variable
      int in = sc.nextInt();

      // if less than zero then goto the top of the loop again
      if (in < 0){
        System.out.println("Please enter a number greater than 0");
        i--;
        continue;
      }

      // else add it to the sum
      sum += in;
    }

    // finally return the sum
    return sum;
  }

Answer 2

倒数第二行。您的方法调用不在任何方法之内。

不正确的方法声明或方法重复？

2 个答案: