package com.coffn.demos;
/*** 4、键盘录入一个正整数，把它的各个位上的数字倒着排列形成一个新的整数并输出。例如：12345 数出54321   78760 输出6787（0省去）*/
import java.util.Scanner;public class Demo1 {public static void main(String[] args) {Scanner sc = new Scanner(System.in);System.out.println("请输入一个正整数:");int num = sc.nextInt();String str = num+"";//反转String reverse =reverse(str);//统计反转后0的个数int count = getSum(reverse);System.out.println();System.out.println("反转后的数字为："+getString(reverse,count));}//反转public static String reverse(String str) {String result = "";for (int i = str.length()-1; i >= 0; i--) {result += str.charAt(i);}return result;}//统计反转之后开头0的个数public static int getSum(String str) {int count = 0;for (int i = 0; i < str.length(); i++) {char ch = str.charAt(i);if (ch == '0') {count++;}else {break;}}return count;}//消0public static String getString(String str, int count ) {//用于后面字符串的拼接String result = "";for (int i = count; i < str.length(); i++) {result += str.charAt(i);}return result;}
}