典型例子：兔子繁殖问题也叫斐波拉切数列



public class Main{

public static void main(String[] args) {

int a=1;

int b=1;

for(int i=1;i<10;i++){

int c=a+b;

System.out.print(c+" ");

a=b;

b=c;

}

}

}