public:
    double Power(double base, int exponent) {
        double result=1;
        int i;
        //暴力法
        if(exponent>0){
            for(i=1;i<=exponent;i+=1){
                result*=base;
            }
        }
        else{
            exponent=-exponent;
            for(i=1;i<=exponent;i+=1){
                result*=1/(base);
            }
        }
        return result;
    }
};