I have this code to find the power of x^y. i already found out how to do x^y but am having trouble doing x^-y (x to the -y power) Here is my code

Can anyone please give me hints to do x to the -y power?Code:`#include <iostream.h>`

int main()

{

double x,y;

double sum = 1;

cout << "Enter the X number : ";

cin >> x;

cout << "Enter the Y number : ";

cin >> y;

for (int a =1; a<=y; a++)

{

sum = sum * x;

}

cout << sum << endl;

cin >> hold;

}

Thanks.