Example of flipper zero app source code

Example of flipper zero app source code : 

- This is counter increamnt by InputKeyDown and InputKeyUp in flipper zero :

#include <furi.h>
#include <gui/gui.h>
#include <stdlib.h>
#include <gui/elements.h>
#include <input/input.h>
#include <stdio.h>

typedef struct {
    int number;
    bool confirm;
} AppState;

// Render callback
static void render_callback(Canvas* canvas, void* context) {
    AppState* app_state = (AppState*)context;

    // Clear the canvas
    canvas_clear(canvas);

    // Set font and draw text
    canvas_set_font(canvas, FontSecondary);