題目:判斷一個數能被幾個9整除。
import java.util.Scanner;
public class Prog45{
public static void main(String[] args){
System.out.print("請輸入一個數:");
Scanner scan = new Scanner(System.in);
long l = scan.nextLong();
long n = l;
scan.close();
int count = 0;
while(n>8){
n /= 9;
count++;
}
System.out.println(l+"能被"+count+"個9整除。");
}
}