因式分解

直接上源码，看不懂评论区留言~

package taolun;

import java.util.Scanner;

public class fenjie {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input = new Scanner(System.in);
		System.out.println("输入整数");
		int a = input.nextInt();
		input.close();
		System.out.print(a+"=");
		for (int i = 2; i <= a; i++) {
			while (a%i==0) {
				System.out.print(i);
				a/=i;
				if (a!=1) {
					System.out.print("*");
				}
			}
		}
	}

}