fahrenheit-celsius.c

#include <stdio.h>

#define     LOWER 0
#define     UPPER 300
#define     STEP  10

void main(){
    int fahr;

    for (fahr = LOWER; fahr <= UPPER; fahr = fahr + STEP)
        printf("%3d %6.1f\n", fahr, (5.0/9.0)*(fahr-32));
}