What is the best way to break circular dependency between GameFlow and Controller in a game?

For example, I want to create a game, which has a GameFlow to control the game event flow, also I have some controllers (e.g.:PlayerAttackController,EnemyControllerController) for different flow.

GameFlow used to switch controllers, controllers notify GameFlow to change state:

to simple the code I don't use .cpp and use public property only:

GameFlow.h

class GameFlow{
public:
    int state;
    IController* controller;
    void changeState(){
        if(controller!=NULL){
            delete controller;
        }
        if(state==0){
            controller=new PlayerAttackController();
            controller->gameFlow=this;
        }else if(state==1){
            controller=new EnemyAttackController();
            controller->gameFlow=this;
        }
        .
        .
        .
    }
};

IController.h

class IController{
};

PlayerAttackController.h

class PlayerAttackController : public IController{
public:
    GameFlow* gameFlow;
    void buttonPressed(){
        //some player attack code
        .
        .
        .
        gameFlow->state=1;
        gameFlow->changeState();
    }
};

(other controllers are similar)

Now it is clear that GameFlow contains Controller, each controller contains GameFlow, is there any method to break the circular dependency between GameFlow and Controller?