题目:一只青蛙一次可以跳上1级台阶,也可以跳上两级台阶…他也可以跳上n级台阶,此时该青蛙跳上一个n级台阶总共有多少跳法?`
class Solution {
public:
int jumpFloorII(int number) {
int jumpresult = 1;
if (number == 1)
return 1;
else{
for(int i = 2; i <= number; ++i){
jumpresult = jumpresult * 2;
}
return jumpresult;
}
}
};