Question

Which of the following is critical to remember when setting up your array?

	a.	columns used for running totals need to be initialized at the value of zero
	b.	use integer datatypes to store numbers
	c.	columns that are dimensions should be initialized to the value of NULL.
	d.	its best to limit the number of columns per array to 1/3 of the number of rows

Answer 1

SOLUTION:

columns that are dimensions should be initialized to the value of NULL.

Reason:

There are possibilities to leave the size of a 1-D Array size as blank

But that is not possible in 2-D array. We should make array column size as NULL:

/* the Valid declaration*/
int array[2][2] = {1, 2, 3 }  
/* this is also Valid declaration*/ 
int array[][2] = {1, 2, 3 }  
/* this is not Invalid declaration – you must specify second dimension*/
int array[][] = {1, 2, 3 }   
/* Invalid because of the same reason  mentioned above*/
int array[2][] = {1, 2, 3 ,4, 5}