java 题目：取一个整数 a 从右端开始的 4～7 位。

import java.util.Scanner;

public class Pro2 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in); 
		System.out.println("input the number:");
		int a = 0 ;
		a = in.nextInt();
		a = a/1000;
		int[] b= new int[4];
		for (int i = 0; i < b.length; i++) {
			b[i] = a%10;
			a = (a-b[i])/10;
		}
		for (int i = 0; i < b.length; i++) {
			System.out.printf("第%d位数字为：%d\n",i+4,b[i]);
		}
	}

}