To integrate gameplay via variable and ink, you have two major solutions. Which one you choose depends of your use case:

1. have Ink be the master of the logic. Technically, that means the "true" variable is staying in ink. The rest of the game is reading the value in ink to know it and act on it.

2. have the master of the logic outside ink. It means you need an external function each time you want to read the variable in ink (that will ask the "true" value).

There is no way that is better or worse than the other, it's mostly depending of what you want your code to do.
Points to know:

• to trigger code from ink to your code:
  • to have an answer: see external function ( https://github.com/inkle/ink/blob/master/Documentation/RunningYourInk.md#external-functions ) you have to define a function, and it will, under the hood, call your c# code to handle the result.
  • to trigger an effect (no answer needed - display a value, change the color of the text, clear the screen....) there is two solutions, resolving around the same: ink will see it as text, and do nothing. Your code, however, will see that it has something to do. The already implemented, ready to go solution is tags (https://github.com/inkle/ink/blob/master/Documentation/RunningYourInk.md#marking-up-your-ink-content-with-tags) but custom parsing is also possible and up to you (but you'll need to handle the custom parsing on your own in your c# code)
• to trigger some code in ink from your code:
  • to jump to another scene (warning, it will erase your current pointer to where you are in the story, but you can use it typically for the end: kinda like "You sense your last breath, you are dead. Retry ?") see https://github.com/inkle/ink/blob/master/Documentation/RunningYourInk.md#jumping-to-a-particular-scene
  • to change a variable in ink when it's changed outside of ink. See https://github.com/inkle/ink/blob/master/Documentation/RunningYourInk.md#settinggetting-ink-variables (variable observer are neat, too, and will handle two way sync between c# code and ink)

Let me know if there is a specific point where you need more info, as I just redirect you with an overview and the documentation (there is a ton of things that is possible in ink, you just have to get the keys on how to use it to be able to create neat game.)

thank you for your kindness. i checked all of your informations!
It's sad news, but I haven't solved my problem yet. i will try again. thank you!