java - 在java中重复一个程序

Question

已关闭。此问题需要 debugging details 。目前不接受答案。

---

编辑问题以包含 desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem 。这将有助于其他人回答问题。

已关闭 9 年前。

Improve this question

我一直在尝试重复这个程序，但是当我这样做时，我不断收到错误。我之前重复过，但它要求在每行星号后重复。这是我到目前为止所拥有的:

import java.util.Scanner;

public class Pyramid 
{

//Displaying a Pyramid
public static void main(String[] args) 
{
  Scanner scanner = new Scanner(System.in);
  //Get user input = number of rows to print in a pyramid
  System.out.print("Enter an integer for the number of rows: ");
  int userInput = scanner.nextInt();
  scanner.close();

  int myLevel;
  int i, j , k;

  myLevel = userInput;

  for (i = 1; i <= myLevel; i++) {

  for (k =1; k <= myLevel-i; k++)

  System.out.print(" ");

  for (j = k+1; j <=myLevel; j++) 

  System.out.print( "*");
  for(int l=myLevel;l>k-1;l--)
  System.out.print( "*");

  System.out.println("");
   System.out.println("You want to continue : (Y/N) ");
    } while("Y".equalsIgnoreCase(scanner.next().trim()));
  }

}

Answer 1

我猜您想重复上述逻辑 - 对吧？

如果是这种情况，请不要关闭您的扫描仪

此外，您的 while 格式错误。

while("Y".equalsIgnoreCase(scanner.next().trim()));

在这种情况下，末尾有 ; 将导致无限循环。

尝试

private static void myMethod(Scanner scanner) {
      //Get user input = number of rows to print in a pyramid
      System.out.print("Enter an integer for the number of rows: ");
      int userInput = scanner.nextInt();

      int myLevel;
      int i, j , k;

      myLevel = userInput;

      for (i = 1; i <= myLevel; i++) {

      for (k =1; k <= myLevel-i; k++)

      System.out.print(" ");

      for (j = k+1; j <=myLevel; j++) 

      System.out.print( "*");
      for(int l=myLevel;l>k-1;l--)
      System.out.print( "*");

      System.out.println("");

}

和

这样称呼

    Scanner scanner = new Scanner(System.in);

    do {
        myMethod (scanner);
        System.out.println("You want to continue : (Y/N) ");
    } while("Y".equalsIgnoreCase(scanner.next().trim()));   

    scanner.close ();