数值的整数次方-个人解法

数值的整数次方

• 没有做exponent为0或者1的判断
• 只做了exponent正负的判断

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