Including header file not working properly

[anonymous_user_6c99361f]

Hi so i have my projectname.h header file , and in that file i have included three other header file.
in one of those header file i have a struct(USTRUCT) defined.
I am including my projectname.h header file in my custom playercontroller header file.

and when i am trying to declare an array of that struct type in my playercontroller header file, i get compile error like this : Unrecognized type ‘FInventoryItem’ - type must be a UCLASS, USTRUCT or UENUM

so it actually seems even though i am including projectname.h header file in all of my header file, it is not including the other header file properly

so my projectname.h file contains this —
// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.
// lastsurvivorsonline.h
#pragma once

//#ifndef _CORE_H_
//#define _CORE_H_
//#include "Core.h"
//#endif // !_CORE_H_


//#ifndef _ENGINE_H_
//#define _ENGINE_H_
//#include "Engine.h"  
//#endif // !_ENGINE_H_

//#ifndef _GMGAMEPLAY_H_
//#define _GMGAMEPLAY_H_
//#include "GMGamePlay.h"  
//#endif // !_GMGAMEPLAY_H_

//#ifndef _PCGAMEPLAY_H_
//#define _PCGAMEPLAY_H_
//#include "PCGamePlay.h"  
//#endif // !_PCGAMEPLAY_H_

//#ifndef _LASTSURVIVORSONLINECHARACTER_H_
//#define _LASTSURVIVORSONLINECHARACTER_H_
//#include "lastsurvivorsonlineCharacter.h"  
//#endif // !_LASTSURVIVORSONLINECHARACTER_H_


//#ifndef _INTERACTABLE_H_
//#define _INTERACTABLE_H_
#include "Interactable.h"  
//#endif // !_INTERACTABLE_H_

//#ifndef _PICKUP_H_
//#define _PICKUP_H_
#include "Pickup.h"  
//#endif // !_PICKUP_H_

//#ifndef _INVENTORYSTRUCTURE_H_
//#define _INVENTORYSTRUCTURE_H_
#include "InventoryStructures.h"  
//#endif // !_INVENTORYSTRUCTURE_H_



#ifndef COLLISSION_INTERACTABLE
#define COLLISSION_INTERACTABLE ECC_GameTraceChannel1;
#endif // !COLLISSION_INTERACTABLE

my InventorySturecture.h header file(which contains the structs) contains this
//InventoryStructure.h

#pragma once
#define _INVENTORYSTRUCTURE_H_


#include "Engine/DataTable.h"
#include "lastsurvivorsonline.h"
#include "InventoryStructures.generated.h"



USTRUCT(BlueprintType)
struct FCraftingInfo :public FTableRowBase
{
	GENERATED_USTRUCT_BODY()
public:

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		FString ComponentID;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		FString ProductID;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		int32 CraftCount;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		bool bDestroyItemA;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		bool bDestroyItemB;




};

USTRUCT(BlueprintType)
struct FInventoryItem :public FTableRowBase
{
	GENERATED_USTRUCT_BODY()

public:

	FInventoryItem()
	{
		Name = FText::FromString("Item");
		Action = FText::FromString("Use");
		Description = FText::FromString("Please Enter a Description For This Item");
		Value = 10;
		Health = MaxHealth;
	}

	FInventoryItem(const FInventoryItem&  Item)
	{
		ItemId = Item.ItemId;
		ItemPickup = Item.ItemPickup;
		Name = Item.Name;
		Action = Item.Action;
		Value = Item.Value;
		Count = Item.Count;
		MaxStackSize = Item.MaxStackSize;
		Thumbnail = Item.Thumbnail;
		Description = Item.Description;
		CraftCombinations = Item.CraftCombinations;
		bStackable = Item.bStackable;
		bCanBeUsed = Item.bCanBeUsed;
		Health = Item.Health;
		MaxHealth = Item.MaxHealth;
		UseDamageTable = Item.UseDamageTable;
		bSingleUse = Item.bSingleUse;

	}



	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		FString ItemId;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		TSubclassOf<class APickup> ItemPickup;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		FText Name;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		FText Action;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
		FName UseText;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		int32 Value;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		int32 Count;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		int32 MaxStackSize;

	UPROPERTY(EditAnywhere,BlueprintReadWrite)
	float Health;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
	float MaxHealth;

	

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		UTexture2D* Thumbnail;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		FText Description;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		TArray<FCraftingInfo> CraftCombinations;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
		TMap<FString, float> UseDamageTable;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		bool bStackable;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		bool bSingleUse;

	UPROPERTY(EditAnyWhere, BlueprintReadWrite)
		bool bCanBeUsed;


	bool operator==(const FInventoryItem& Item)const
	{
		if (ItemId == Item.ItemId)
		{
			return true;
		}
		else
		{
			return false;
		}
	}
};

and my player controller PCGamePlay.h file contains this
// Fill out your copyright notice in the Description page of Project Settings.
//PCGamePlay.h
#pragma once
#define PCGAMEPLAY_H

#include "CoreMinimal.h"
#include "GameFramework/PlayerController.h"
#include "lastsurvivorsonline.h"
#include "PCGamePlay.generated.h"

/**
 * 
 */
UCLASS()
class LASTSURVIVORSONLINE_API APCGamePlay : public APlayerController
{
	struct FinventoryItem;
	GENERATED_BODY()
public:

	

	UPROPERTY(BlueprintReadWrite,VisibleAnywhere)
	class AInteractable* CurrentInteractable;  // Current Interactable or pick up object
	
	UPROPERTY(BlueprintReadWrite,VisibleAnywhere)
	TArray<FInventoryItem> Inventory;  // here i am getting the error at build time - [PlayerControllers/PCGamePlay.h(28): error : Unrecognized type 'FInventoryItem' - type must be a UCLASS, USTRUCT or UENUM]

	UFUNCTION(BlueprintCallable, Category = "Utils")
		void AddItemToInventoryByID(FName itemID);

	UFUNCTION(BlueprintCallable, Category = "Utils")
		void AddItemToInventory(APickup* pickup);

	UFUNCTION(BlueprintCallable, Category = "Utils")
		void CraftItem(FInventoryItem ItemA, FInventoryItem ItemB,  APCGamePlay* controller);

	UFUNCTION(BlueprintImplementableEvent)
		void ReloadInventory();

	void Interact();

protected:
	virtual void SetupInputComponent() override;
	
	
};

please help…

also i have known from this link : [link text][1]

that i can show all the included header file but i am unable to get this c/c++ option on my project settings.am i mising something.please i need help i am stuck here.

Thank you in advance.