While Loop Help/Advice "Working Now"

// ex9.c --- converts Fahrenheight to Celcius and Kelvin
  2 #include <stdio.h>
  3 #include <stdlib.h>
  4
  5 void Temperatures(double fahr);
  6 int main(void)
  7 {
  8     double fahr;
  9
 10     printf("Please enter a Fahrenheit temperature: ");
 11     scanf("%lf", &fahr);
 12     Temperatures(fahr);
 13     while(scanf("%lf", &fahr) >= 1)
 14     {
 15         Temperatures(fahr);
 16     }
 17     printf("Done!\n");
 18     return 0;
 19 }
 20
 21 void Temperatures(double fahr)
 22 {
 23     const double cels = 5.0 / 9.0 * (fahr - 32.0);
 24     const double kelv = cels + 273.16;
 25
 26     printf("Fahrenheit: %.2lf\n", fahr);
 27     printf("Celsius: %.2lf\n", cels);
 28     printf("Kelvin: %.2lf\n", kelv);
 29 printf("Please enter a Fahrenheit temperature or q to quit. ");
 30 }