Creating a library to manipulate a LED busbar

// -------------------------------------- Prototype Function --------------------------------------------------------------------------
// Header File: busLeds.h
#ifndef LEDSBUSBAR_H_INCLUDED
    #define LEDSBUSBAR_H_INCLUDED

    unsigned char turnOnLeds(unsigned char code, unsigned char stateLeds);
    unsigned char turnOffLeds(unsigned char code, unsigned char stateLeds);
    unsigned currentLedsState(unsigned char stateLeds);

#endif // LEDSBUSBAR_H_INCLUDED

//---------------------------------------- LEDs's Busbar Library ----------------------------------------------------------------------
// .C File: busLed.h
#include <stdio.h>
#include "ledsBusbar.h"

// Receives the parameter "code" which identify what Leds in busbar which will turn on.
// For instance, code = 0xA2 will turn on the lEDs 7, 5, 1 and 0.
// The parameter "stateBits" receive the previous state of LEDs busbar.
    unsigned char turnOnLeds(unsigned char code, unsigned char stateLeds){
        unsigned char getLeds;
        getLeds = stateLeds | code;
        return getLeds;
    }
// Receives the parameter "code" which identify what LEDs's busbar which will turn off.
// For instance, code = 0x55 will turn on the lEDs 6, 4, 2 and 0.
// The parameter "stateBits" receive the previous state of LEDs's busbar.
    unsigned char turnOffLeds(unsigned char code, unsigned char stateLeds){
        unsigned char getLeds = 0x00;
        getLeds = stateLeds & (~code);
    return getLeds;
    }
// Displays the current state of LEDs's busbar.
    unsigned currentLedsState(unsigned char stateLeds){
        unsigned char currentLeds;
        currentLeds = stateLeds;
        return currentLeds;
    }

//-------------------------------------------  Test File for this library -------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include "ledsBusbar.h"

int main(){
    int turnOff = 0, exit = 0;
    unsigned char codeOn = 0x00, codeOff = 0x00,  leds = 0x00, stateLeds = 0x00;

    while (exit != 1){
        printf("Insert the hexadecimal code to turn on LEDs: ");
        scanf("%x",&codeOn);

        leds = turnOnLeds(codeOn, stateLeds);
        printf("%x\n",leds);

        printf("\nDo you want to turn off LEDs: Yes - Press 1 / No - Press any Character: ");
        scanf("%d", &turnOff);

        if (turnOff == 1){
            printf("Insert the hexadecimal code to turn off LEDs: ");
            scanf("%x",&codeOff);
            leds = turnOffLeds(codeOff, leds);
            printf("%x\n",leds);
        }

        stateLeds = currentLedsState(leds);

        printf("\n\nThe current leds state is %X.",stateLeds);

        printf("\n\nDo you want to continue? Yes - Press any Character / No - Press 1: ");
        scanf("%d",&exit);
    }
    return 0;
}
*** Note: This code display how to develop a code library which have three function:
          1 - turnOnLeds - Receive two paramenters, code and stateLeds. "code" inserts a 8 bits value coded in hexadecimal format to
              turn on 8 leds in busbar. "stateLeds" receives the previous state of the LED busbar.
          2 - turnOffLeds - Receive two paramenters, code and stateLeds. "code" inserts a 8 bits value coded in hexadecimal format to
              turn off 8 leds in busbar. "stateLeds" receives the previous state of the LED busbar.
          3 - currentLedsState - Display the current state of led busbar.