Integral Nth root Newton Raphson

#include <stdio.h>
#include <math.h>

int root( int A, int n )
{
    int ret, s;

    ret = 1; /* Initial guess */
    s = 1;

    for ( ; ; )
    {
        ret = ( ( n - 1 ) * ret + ( A / ( int )pow( ret, n - 1 ) ) ) / n;

        if ( s == ret )
        {
            break;
        }
        else if ( s != ret - 1 )
        {
            s = ret;
        }
    }

    return ret;
}

int main( int argc, char* argv[] )
{
    printf( "%ith root of %i = %i\n", 4, 103, root( 103, 4 ) );

    return 0;
}