#include <stdio.h>
int main(){
  float fahr, celsius;
  float lower, upper, step;

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

  celsius = lower;
  printf("fahrenheit celsius\n");
  while (celsius <= upper) {
    fahr = ((9.0/5.0) * celsius)+32.0;
    printf("%10.0f %7.1f\n", celsius, fahr);
    celsius = celsius + step;
  }
}