Question

使用For-Loop帮我编写一个程序，打印用户输入字符串的每三个字符。未显示的字符将打印为下划线。该程序的示例运行可能如下所示：

输入字符串：君士坦丁堡

C _ _ s _ _ n _ _ n _ _ l _

mycode的：

public class Ex02ForLoop {
public static void main(String[] args) {
    //name of the scanner    
    Scanner scanner = new Scanner(System.in);

    //initialize variable
    String userInput = "";

    //asking to enter a string
    System.out.print("Enter a string: ");

    //read and store user input
    userInput = scanner.next();

    //using For-Loop displaying in console every third character
    for (int i = 0; i <= userInput.length(); i+=3)
    {   
        System.out.print(userInput.charAt(i) + " _ _ ");    
    }
    scanner.close();
}}

但我的输出是： C _ _ s _ _ n _ _ n _ _ l _ _ 需要做一些事情才能把正确的下划线数量谢谢

Answer 1

使用此：

foreach($rows as $row) {
   echo $row['shortlink'];
}

Answer 2

尝试替换它：

 for (int i = 0; i <= userInput.length(); i+=3)

使用：

  for (int i = 0; i < userInput.length(); i++)
  {
    if(i % 3 == 0)
      System.out.print(userInput.charAt(i));
    else
      System.out.print("_");
  }

在java中打印用户输入字符串的每三个字符

2 个答案: