ex_1_3.c

#include <stdio.h>

/* print Fahrenheit-Celsius table
	for fahr = 0, 20, ... , 300; floating-point version */
main()
{
	float fahr, celsius;
	int lower, upper, step;

    lower = 0;      /* lower limit of temperature table */
    upper = 300;    /* upper limit */
    step = 20;      /* step size */

    printf("%3c | %6c\n", 'F', 'C');
    printf("------------\n");

    fahr = lower;
    while (fahr <= upper) {
        celsius = (5.0/9.0) * (fahr-32.0);
        printf("%3.0f | %6.1f\n", fahr, celsius);
        fahr = fahr + step;
    }
}