经典兔子问题

//兔子繁衍
//求第十二个月有多少对兔子
package papers;

import java.util.Scanner;

public class rabbit {
    public static void main(String[] args) {

        int sum = 1;   //兔子总数
        int one = 1;   //1个月前兔子总数
        int two = 1;   //2个月前兔子总数
        for (int month = 1; month < 13; month++) {
            if (month < 3) {
                sum = 1;
            } else {
                sum = one+ two;
                two = one;
                one = sum;
            }
            System.out.println("第" + month + "个月" + sum + "对兔子");

        }
    }
}