retrieving structure variable data from an array of that structure data type

Hi, I am learning to use an array of the structure data type.  Specifically, to access the multiple dot-notated variables' from the structure array .

I can declare a structure, list the variables, assign data to those dot-notated variables, declare an array from the structure data type, assign the structures' dot notated variables to the array, but then how to access the data from the multiple dot-notated variables in each index of the array is where im stuck.

I have read up on arrays, but when each index contains multiple variables (each followed by semicolon) i'm not clear how get the data from any one of the multiple dot-notated variables of any single index  of the array.

I know structure parameters must be passed by reference, which means (i think) if you change the structure inside a function, the changes to it are not saved outside the function.

So, i think I have most of the peices of the puzzle, but I'm missing a few peices to have a complete picture. thanks for any help. Sorry for so many posts lately, im in the steep part of my learning curve.