跳台阶

 1 class Solution {
 2 public:
 3     int jumpFloor(int number) {
 4         if(  number == 1 )
 5             {
 6                 return 1;
 7             }
 8          if(  number == 2 )
 9             {
10                 return 2;
11             }
12         return jumpFloor(number-1) + jumpFloor(number-2);
13     }
14 };