#include <stdio.h>

int main ()
{
    float fahr, celsius;
    float lower, upper, step;
    
    lower = 0;
    upper = 300;
    step = 20;
    
    fahr = lower;
    printf("Fahr. Celsius\n");
    while(fahr <= upper) {
        celsius = (5.0/9.0) * (fahr-32.0);
        printf("%3.0f %6.1f\n", fahr, celsius);
        fahr += step;
    }
    printf("\n");
    
    celsius = lower;
    printf("Celsius Fahr.\n");
    while(celsius <= upper) {
        fahr = (celsius/(5.0/9.0))+32.0;
        printf("%3.0f %6.1f\n", celsius, fahr);
        celsius += step;
    }
    return 0;
}