题解 | #数值的整数次方#

分正负

class Solution {
public:
    double Power(double base, int exponent) {
        if(base==0) return 0;
        if(exponent==0) return 1;
        double ans=1;
        if(exponent>0){
            while(exponent!=0){
                ans*=base;
                exponent--;
            }
        }
        if(exponent<0){
            while(exponent!=0){
                ans/=base;
                exponent++;
            }
        }
        return ans;
    }
};