File content as of revision 2:89f04cd3bf45:

#ifndef ITEM_H
#define ITEM_H

#include "mbed.h"

/** item Class
* @the item class has three functions
  1 generate an item in random position after one disappear
  2 build the item's structer
  3 build a barrier to increase difficulty
* @date April 13th 2020
* @author Yaomochu

@code

#include "mbed.h"
#include "item.h"
#include "Gamepad.h"
#include "N5110.h"
#include <cstdlib>
#include <ctime>

N5110 lcd(PTC9,PTC0,PTC7,PTD2,PTD1,PTC11);
Gamepad gamepad;
item _item;

int _explorer_x;
int _explorer_y;
int _score;
bool _collision_flag;

int main()
{
  _item.init();
  _explorer_x = 40;
  _explorer_y = 15;
  _player_score = 0;
  srand(time(NULL));%this srand comment reqire the coin to get a random location value

  while(1){
  // If the player collides with the item,a flag will be set to run the interruprtion. player's score will be +1
    if (_explorer_x == _item.get_x()&&(_explorer_y == _item.get_y() - 5))
   {
    _collision_flag = true;
    _score++;
  // the item will have a new random position and make a noise.
    _item.set_item((rand()%100),(abs(rand()%100 - 10)));
  // Place item on a constrained random position.
    gamepad.tone(2000, 0.05);  // Make collection noise on buzzer.
    
// If the player collides with the barrier,a flag will be set to run the interruprtion. player's score will be -1
    if (_explorer_x == _barrier.get_x()&&(_explorer_y == _barrier.get_y() - 5))
   {
    _collision_flag = true;
    _score--;
  // the barrier will have a new random position and make a noise.
    _item.set_barrier((rand()%100),(abs(rand()%100 - 10)));
  // Place barrier on a constrained random position.
    gamepad.tone(3000, 0.05);  // Make collection noise on buzzer.
    }

    // than draw the next item on the lcd.
    lcd.drawSprite(_item.get_x(),_item.get_y(),6,5,(int*)_item.get_item_sprite());
    lcd.drawSprite(_barrier.get_x(),_barrier.get_y(),7,7,(int*)_barrier.get_barrier_sprite());
  }
}

@endcode
*/

class item
{
public:
    // Constructor and Destructor.
    item();
    ~item();

    // Initialises object.*/
    void init();
    //Generates the item and barrier. 
    void generate_item();
    //Sets the item coordinates.
    //rand_x = a random number that determines the x coordinate
    //rand_y = a random number that determines if the item's generated level
    void set_item(int rand_x, int rand_y);
    void set_barrier(int rand_dx, int rand_dy);
    int *get_item_sprite();
    int get_item_x();
    int get_item_y();
    int *get_barrier_sprite();
    int get_barrier_bx();
    int get_barrier_by();


private:
    int _x;
    int _y;
    int _bx;
    int _by;
    int _loop;
    bool _rotate_item;
};
#endif