Change to init app in init()

inc/App.hpp

@@ -1,13 +1,13 @@
-#include <array>
+#include <vector>
 #include "Tree.hpp"
 
 class App
 {
 
 public:
-  App(int screenWidth, int screenHeight);
+  App() = default;
   ~App() = default;
-  void init();
+  void init(int screenWidth, int screenHeight);
   void update();
   void draw();
   void deinit();
@@ -15,7 +15,7 @@ public:
 private:
   int pos = 0;
   int screenWidth, screenHeight;
-  std::array<Tree, 2> trees;
+  std::vector<Tree> trees;
   Vector2 center;
   float rotation = 0.0f;
   Rectangle destB;