/*
 * temperature_conversion_function.c
 *
 *  Rewrite the temperature conversion program to use a function.
 *  K&R Exercise 1.15
 */

#include <stdio.h>


#define LOWER   -100
#define UPPER   100
#define STEP    10


float celsius2fahrenheit(float celsius);


int
main()
{
    float celsius, fahr;

    celsius = LOWER;
    while (celsius <= UPPER) {
        fahr = celsius2fahrenheit(celsius);

        /*
         * printf modifiers:
         * %f floats
         * %d ints
         *
         * special characters:
         * \n newline
         * \t tab
         *
         * width.precision  for %f
         */
        printf("Celsius: %6.1f\t Fahrenheit: %6.1f\n", celsius, fahr);

        celsius = celsius + STEP;
    }

    return 0;
}

float
celsius2fahrenheit(float celsius)
{
    return 9.0/5.0 * celsius + 32.0;
}