Question about multi-dim arrays

[SilverLake]

So I' am working on this side project for fun here. I' am using a multi-dimensional array throughout the project. Now I' am having an issue with actually holding a position with in the multi-dim array. Here's an example of what I' am kind of talking about.

void playerHuman(char theBoard[][HEAVY_FIRE], const int H_FIRE)
{
     char playerHuman = 143
     char deathDealer = theBoard[18][10]
     
     
     deathDealer = playerHuman;
     
}

I know that is wrong, but just to give an example I put it up. What I want to do is declare a variable that is a coordinate in the multi-dim array.

That example is just really printing the character within the multi-dim array but I have no control over it, because there is no variable attached to that position. I' am not able to use it in different functions like for movement.