Pow(x, n)

一、题目要求

Implement pow(x, n).

二、代码实现

double myPow(double x, int n) {        if(n==0)        return 1;if(n==1 ||x==0)return x;if(x==0)return x;if(n<0){x=1/x;n=-n;}//double tmp=myPow(x,n/2);if(n%2)return x*tmp*tmp;return tmp*tmp;    }