Java经典习题4

/*
题目：将一个正整数分解质因数。例如：输入90,打印出90=2*3*3*5。
*/

import java.util.*;

public class Class4 {

public static void main(String[] args) {
Scanner s = new Scanner(System.in);
System.out.println("输入一个正整数:");
int a = s.nextInt();
int b = 2;
System.out.print(a + "=");
while( a >= b){
if(a == b){
System.out.println(a);
break;
}else{
if(a % b == 0){
System.out.print(b + "*");
a = a/b;
}else{
b++;
}

}
}

}

}