package com.hpu.bai;/** * 此程序用来把一个正整数分解成质因数相乘 如 20 = 2*2*5； * @author bai * */public class Byprime {        public static int  prime(int m){            int k =2;int count =0;            System.out.print(m+"=");            while(k<=m){                if(k == m){                    System.out.print(m);                    count+=1;                    break;                }else                if(m%k ==0){                System.out.print(k+"*");                count+=1;                m = m/k;                }else{                k++;                }    }            return count;}public static void main(String[] args) {        int count = prime(29);    if(count ==1 ){        System.out.println("这是一个素数");            }else System.out.println("这是一个合数");}}交流QQ623687677  java 初学者