Using Int variables between 2 scripts

I know that in my case I could as well write the classes together in 1 script, but I wanna learn how to link up 2 scrips properly.
Button 1 with scipt A: Increases the variable int scoreA by +1 each time it is clicked.
Button 2 with script B: Does the very same (int scoreB raised +1)
Button 3 with script C: should compare scoreA and scoreB.

I cannot figure out how to get the actual/adjusted values of the 2 variables scoreA and scoreB into the third script.(script C)

 

There are a few ways to do this.

One example

Code (CSharp):

1. public void Start()
2. {
3.     gameObject.Find("NameOfTheGameObjectTarget").GetComponent<NameOfTheScript>().NameOfTheProperty = ...;
4. }

Where NameOfTheGameObjectTarget would be Button 1 and 2, NameOfTheScript is self explanatory, and then NameOfTheProperty would be the Scores.

Another option, instead of using gameObject.Find is to declare these in Script 3 (for example, "public GameObject Script 1" and then assigning the gameobject in the Inspector screen for the gameobject Script 3 is attached to).