数值的整数次方

public class Solution {
    public double Power(double base, int exponent) {
        int n;
        if(exponent==0){
            return 1;
        }
        if(exponent<0){
            if(base==0){
                throw new RuntimeException("分母不能为0");
            }
            n = -exponent;
        }else{
            n = exponent;
        }
        
        double result=1;
        for(int i=0; i<n; i++){
            result = result*base;
        }
        return exponent>0?result:(1/result);
  }
}