Java编程题练习2017-02-22
2017-02-23 20:36
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2017-02-22题目:一个5位数,判断它是不是回文数。即12321是回文数,个位与万位相同,十位与千位相同。
package ru;
import java.util.Scanner;
public class ru20170223 {
}
package ru;
import java.util.Scanner;
public class ru20170223 {
/** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner in=new Scanner(System.in); int[] a = new int[5]; int[] b = new int[5]; boolean is =false; long l = in.nextLong(); if (l > 99999 || l < 10000) { System.out.println("Input error, please input again!"); l = in.nextLong(); } for (int i = 4; i >= 0; i--) { a[i] = (int) (l / (long) Math.pow(10, i)); l =(l % ( long) Math.pow(10, i)); } for(int i=0,j=0; i<5; i++, j++) { b[j] = a[i]; } for(int i=0,j=4; i<5; i++, j--) { if(a[i] != b[j]) { is = false; break; } else { is = true; } } if(is == false) { System.out.println("is not a Palindrom!"); } else if(is == true) { System.out.println("is a Palindrom!"); } }
}
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