在线调试power函数

void main()
{
double x, y, z;
scanf("%lf,%lf", x, y);
z =power(x, y);
printf("%lf to the power %lf is %lf\n", x, y, z);

}
double power(double x, double y)
{
double z = 1;
while (y)
{
z *= x;

}
return z;

}