U++ learning notes ustruct, uenum declaration and function library simple function implementation

.h：

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "MyBlueprintFunctionLibrary.generated.h"

/**
 * 
 */
USTRUCT(BlueprintType)
struct FTest {
	GENERATED_BODY()

	UPROPERTY(EditAnywhere, Category = "Analytics")
		int32 value1;

	UPROPERTY(EditAnywhere, Category = "Analytics")
		int32 value2;
};

UENUM(BlueprintType)
enum class EMyEnum : uint8 {
	value1,
	value2
};

UCLASS()
class FLOATINGCUBE_API UMyBlueprintFunctionLibrary : public UBlueprintFunctionLibrary
{
	GENERATED_BODY()

	UFUNCTION(BlueprintCallable, Category = "Analytics")
		static FTest DoSwap(const int32 &value1, const int32 &value2, int32& valueout1, int32& valueout2);//& Output for function ,const & Enter constants for 

	UFUNCTION(BlueprintCallable, Category = "Analytics")
		static bool AnotherDoSwap(int32 value1, int32 value2);
};

.cpp： 

// Fill out your copyright notice in the Description page of Project Settings.


#include "MyBlueprintFunctionLibrary.h"

FTest UMyBlueprintFunctionLibrary::DoSwap(const int32 &value1, const int32 &value2, int32& valueout1, int32& valueout2) {
	valueout1 = value2;
	valueout2 = value1;
	FTest ftest;
	ftest.value1 = valueout1;
	ftest.value2 = valueout2;
	return ftest;
}

bool UMyBlueprintFunctionLibrary::AnotherDoSwap(int32 value1, int32 value2) {
	value1 ^= value2;
	value2 ^= value1;
	value1 ^= value2;
	return true;
}

---

Achieve results ：

Do Swap in value1、2 Medium is in the code const int32 &value1、2,int& valueout1 by Do Swap Output right of .return Is the return value structure .