小编Alf*_*edo的帖子

我正在尝试使用该函数向用户输入的数字添加零printf()。但是，我不确定语法用法。这是我到目前为止所拥有的：

public class Solution {

    public static void main(String[] args) {
            Scanner reader = new Scanner(System.in);
            final int requiredNumLength = 3;
            // readign untill EOF
            while (reader.hasNext()){
                    // getting the word form the input as a string
                    String word = reader.next();
                    // getting the number from the input as an integer
                    int num = reader.nextInt();
                    int length = String.valueOf(num).length();
                            if (length < requiredNumLength){
                                    int zerosRequired = requiredNumLength - length;
                                    //System.out.println("required zeros: " + zerosRequired);
                            }
                    // print out …