For example, you could say
int examplearray; //This declares an array
This would make an integer array with 100 slots, or
places to store values. The only difficult thing is that it starts off with the
first index-number, that is, the number that you put in the brackets to access a
certain element, is zero, not one!
Think about arrays like this:
 Each of the slots is a slot in the array, and you can put
information into each one of them. It is like a group of variables side by side
What can you do with this
simple knowledge? Lets say you want to store a string, since C++ has no built-in
datatype for strings, in DOS, you can make an array of characters.
Will allow you to declare a
char array of 100 elements, or slots. Then you could get it from the user, and
if the user types in a long string, it will all go in the array. The neat thing
is that it is very easy to work with strings in this way, and there is even a
header file called STRING.H. I will have a lesson in the future on the functions
in string.h, but for now, lets concentrate on arrays. The most useful
aspect of arrays is multidimensional arrays.
Think about multidimensional arrays:
This is a graphic of what a two-dimensional array looks
like when I visualize it.
declares an array that has two dimensions. Think of it
as a chessboard. You can easily use this to store information about some kind of
game, or write something like tic-tac-toe. To access it, all you need are two
variables, one that goes in the first slot, one that goes in the slot. You can
even make a three dimensional array, though you probably won't need to. In fact,
you could make a four-hundred dimensional array. It is just is very confusing to
Now, arrays are basically
treated like any other variable. You can modify one value in it by putting:
You will find lots of useful things to do with arrays,
from store information about certain things under one name, to making games like
tic-tac-toe. One little tip I have is that you use for loops to access arrays.
It is easy:
int x, y, anarray;//declares an array like a chessboard
for(x=0; x<8; x++)
for(y=0; y<8; y++)
anarray[x][y]=0;//sets all members to zero once loops is
for(y=0; y<8; y++)
Here you see that the loops work well because they
increment the variable for you, and you only need to increment by one. It is
simple, and you access the entire array, would you want to use while loops?