Change to init app in init()

src/App.cpp

@@ -6,12 +6,13 @@
 #include "raylib.h"
 #include "raymath.h"
 
-App::App(int screenWidth, int screenHeight) : screenWidth(screenWidth), screenHeight(screenHeight), trees({Tree(screenWidth), Tree(screenWidth)})
+void App::init(int screenWidth, int screenHeight)
 {
-}
+  this->screenWidth = screenWidth;
+  this->screenHeight = screenHeight;
+  trees.emplace_back(screenWidth);
+  trees.emplace_back(screenWidth);
 
-void App::init()
-{
   for (auto &&tree : trees)
     tree.newTree();
 
@@ -20,7 +21,6 @@ void App::init()
   destA = CalculateRect(center, rotation, screenWidth, screenWidth);
   destB = {destA.x, destA.y, (float)screenWidth, (float)screenWidth};
 }
-
 void App::update()
 {
   if (IsMouseButtonDown(MOUSE_BUTTON_LEFT))

src/main.cpp

@@ -16,8 +16,8 @@ int main(void)
 #endif
   SetTargetFPS(60);
 
-  App app(screenWidth, screenHeight);
-  app.init();
+  App app;
+  app.init(screenWidth, screenHeight);
   while (!WindowShouldClose())
   {
     app.update();