How do I set up variables of a C++ class using configuration files?

Development Programming & Scripting
1

Long story, I need to change the default value of the variables of a C++ class without recompiling the code.
The approach I took was to use config file.

Following the documentation I wrote the following code in a file called SimonSaysGameMode.h in Root/Source/

UCLASS(BlueprintType, Config=Game)
class APPTREATMENTDEMO_API ASimonSaysGameMode : public AGameModeBase
{
	GENERATED_BODY()
	
public:

	ASimonSaysGameMode();

	UPROPERTY(Config)
		int RoundsToRaiseDifficulty;

	UPROPERTY(Config)
		int FaultPenaltyPoints;

        ...
};

I added the followind code in the file in Root/Config/DefaultEngine.ini

[/Script/SimonSaysGameMode.SimonSaysGameMode]
RoundsToRaiseDifficulty=10
FaultPenaltyPoints=1

How can I make the engine set the default values of this class based on the .ini file?

P.S: I made some code for explicit initialization, but, as far as I know, UE4 should be able to do this automatically.

ASimonSaysGameMode::ASimonSaysGameMode()
{
	PrimaryActorTick.bCanEverTick = true;

	GConfig->GetInt(
		TEXT("/Script/SimonSaysGameMode.SimonSaysGameMode"), 
		TEXT("RoundsToRaiseDifficulty"),
		RoundsToRaiseDifficulty,
		GEngineIni
	);

	GConfig->GetInt(
		TEXT("/Script/SimonSaysGameMode.SimonSaysGameMode"),
		TEXT("FaultPenaltyPoints"),
		FaultPenaltyPoints,
		GEngineIni
	);

}
2

In the ini file the part after /Script/ and before .SimonSaysGameMode should be your game module name:

 [/Script/MyGameModule.SimonSaysGameMode]
 RoundsToRaiseDifficulty=10
 FaultPenaltyPoints=1
3

How can I know the name of MyGameModule?

I mean, I undertand that is the name of the file in wich the class is defined. Is perhaps the name of the UE4 proyect?

4

The module name is usually the name of the folder where your source files are located. Module folders are usually located under /YourProject/Source/ directory.

Judging by the class definition you provided I can assume that your module is called AppTreatmentDemo because your class is prefixed as APPTREATMENTDEMO_API. In this case your ini file should be like this:

[/Script/AppTreatmentDemo.SimonSaysGameMode]
RoundsToRaiseDifficulty=10
FaultPenaltyPoints=1

PS. This name matches your project name by default so you are generally correct about it being your project’s name.