#include <stdio.h>

/* print Fahrenheit-Celsius table
   for fahr = 0, 20, ..., 300; floating-point version */
main() 
{
      float fahr, celsius;
      float lower, upper, step;

      lower = 0;      /* lower limit of temperatuire scale */
      upper = 300;    /* upper limit */
      step = 20;      /* step size */

      fahr = lower;
      while (fahr <= upper) {
            celsius = (5.0/9.0) * (fahr-32.0);
            printf("%3.0f %6.1f\n", fahr, celsius);
            fahr = fahr + step;
      }
}