I need help with several questions

Question

1. What is the difference in the meaning between x3 and x[3]?

 

2. For the declaration:

 

int list[8];

 

How many memory cells are allocated for data storage? What type of data can be stored there? How does one refer to the initial array element? 

 

3. When is it better to pass an entire array of data to a function rather than individual elements? 

Answer 1

x3 is simply a variable name. It has nothing to do with the number 3 really.

x[3] is an array of 3 entries (Depending on the type that precedes x[3])

For int list[8];

8 integers worth of memory, so if integer is 4 bytes, then 32 bytes and if integer is 8 bytes then 64 bytes.

First array element would be list[0]

In C language you cannot pass an entire array unless its embedded in a structure. When you pass an array, you are essentially passing its address, so effectively the whole array is available/accessible to the called function.