思路：注意不要加包名，會導致運行時錯誤

package PRactice;import java.util.Arrays;import java.util.Scanner;public class Main {	public static void main(String[] args) {		Scanner in = new Scanner(System.in);		int n = in.nextInt();		int x = 1;		boolean flag = true;		while(n != 1) {			x++;			while(n % x == 0) {				n /= x;				if(flag) {					flag = false;					System.out.print(x);				} else {					System.out.print("*" + x);				}			}		}		System.out.println();	}}