题目:判断一个素数能被几个9整除
//题目错了吧?能被9整除的就不是素数了!所以改成整数了。
import java.util.*;
public class lianxi45 {
public static void main (String[] args) { Scanner s = new Scanner(System.in); System.out.print("请输入一个整数:"); int num = s.nextInt(); int tmp = num; int count = 0; for(int i = 0 ; tmp%9 == 0 ;){ tmp = tmp/9; count ++; } System.out.println(num+" 能够被 "+count+" 个9整除。"); } }