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

  lower = -40;
  upper = 300;
  step = 20;

  celsius = lower;
  printf("%s", "Temperature conversion table (C to F):\n");
  while (celsius <= upper) {
    fahr = celsius * (9.0/5.0) + 32.0;
    printf("%3.0f %6.1f\n", celsius, fahr);
    celsius = celsius + step;
  }
  return 0;
}