#include <stdio.h>
#define UPPER 300
#define LOWER 0
#define STEP 20
main()
{
    float fahr, celsius ;
    fahr = LOWER;
    printf("%3s\t%6s\n", "Farenheit", "Celsius");
    while (fahr <= UPPER) { 
        celsius = 5 * (fahr-32) / 9;
        printf("%3.0f\t%6.1f\n", fahr, celsius);
        fahr = fahr + STEP; 
    }
    fahr, celsius = 0;
    celsius = LOWER;
    printf("%3s\t%6s\n", "Celsius", "Farenheit");
    while (celsius <= UPPER ) {
        fahr = (5.0/9.0) + (celsius + 32.0);
        printf("%3.1f\t%6.0f\n", celsius, fahr);
        celsius = celsius + STEP; 
    }
   for (fahr = 300; fahr >= 0; fahr -= 20){
       printf("%3.1f %6.1f\n", fahr, (5.0/9.0)*(fahr-32));
   }
}