Programming Fundamentals/Functions/C

functions.c

// This program asks the user for a Fahrenheit temperature, 
// converts the given temperature to Celsius,
// and displays the results.
//
// References
//     https://www.mathsisfun.com/temperature-conversion.html
//     https://en.wikibooks.org/wiki/C_Programming

#include "stdio.h"

float get_fahrenheit();
float calculate_celsius(float fahrenheit);
void display_result(float fahrenheit, float celsius);

int main(void) 
{
    float fahrenheit;
    float celsius;
    
    fahrenheit = get_fahrenheit();
    celsius = calculate_celsius(fahrenheit);
    display_result(fahrenheit, celsius);

    return 0;
}

float get_fahrenheit()
{
    float fahrenheit;
    
    printf("Enter Fahrenheit temperature:");
    scanf("%f", &fahrenheit);

    return fahrenheit;
}

float calculate_celsius(float fahrenheit)
{
    float celsius;
    
    celsius = (fahrenheit - 32) * 5 / 9;
    
    return celsius;
}

void display_result(float fahrenheit, float celsius)
{
    printf("%f° Fahrenheit is %f° Celsius", fahrenheit, celsius);
}
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