C++代码:

class Solution {
public:
    double Power(double base, int exponent) {
        if (!base && !exponent) return false; //保证不同时为0,base = 0,exponent = 0,无意义
        if (!base && exponent < 0) return false; //base = 0,exponent <0,无意义
        double res = 1;
        for(int i = 0; i < abs(exponent);i++) res *= base;
        if (exponent < 0) res = 1/res;
        return res;
    }
};