#include <stdio.h>

int main(void) {

double fahr;
double celsius;
int lower = 0;   /*****************************************/
int upper = 300; /* Declarations des variables */
int step = 20;   /*****************************************/

printf("Fahrenheit \t Celsius\n");
fahr = 0;
while (fahr <= upper) {
  celsius = (5.0 / 9.0) * (fahr - 32.0);
  printf("%3.3f\t\t%6.1f\n", fahr, celsius);
  fahr = fahr + step;
  }

return 0;
}