1.2_FtoC.c

#include <stdio.h>

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

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

  fahr = lower;
  while (fahr <= upper) {
      celsius = 5 * (fahr-32) / 9;
      printf("%3d %6d\n", fahr, celsius);
      fahr = fahr + step;
  }

  return 0;
}