error in pow from math.h

error in pow from math.h

I am stuck with this error in C and just can't figure out what's going
wrong. The following query forms an integral part of my code to increment
the values exponentially in successive iterations. Here is the formula
that I programmed:
I have commented the errors in the code.
#include <math.h>
#include <iostream>
int main()
{
double maxMeshS = 0;
double minMeshS = 0;
cout << "enter max mesh size (m): ";
cin >>maxMeshS;
cout <<"\nenter min mesh size (m): ";
cin >> minMeshS;
double raise = maxMeshS/minMeshS; //Values used for run maxMeshS = .5
double factor = 1/9; // minMeshS = .005
double b = pow(raise,factor);
cout << "b " << b << endl; // The error happens here when I use above
values
// b comes out to be 1 which should be
1.668100 instead
double a = minMeshS/b;
cout << "a " << a << endl;
int x;
cout << "enter x " ;
cin >> x;
double queryCube = a*pow(b,x);
cout << queryCube << endl;
return(0);
}
However when I use calculated values for the division maxMeshS/minMeshS ie
100 and 1/9 ie .11111 I obtain the right values for b = pow(100, .1111) =
1.66800. Why is this happening?