Learn to Program with C_ Learn to Program using the Popular C Programming Language ( PDFDrive )

Chapter 8 ■ Arrays
In our example, each element of the array is an int and can be used in any way that an
ordinary int variable can. In particular, a value can be stored in it, its value can be printed, and it
can be compared with another int.
We could picture score as in Figure 8-1.
Figure 8-1. Declaration of int score[60]
Like a simple variable, when an array is declared, the values of its elements remain undefined
until we execute statements that store values in them. This is discussed in Section 8.3, next.
To give another example, suppose we need to store the item numbers (integers) and prices
(floating-point numbers) of 100 items. We can use one array (item, say) to hold the item numbers
and another array (price, say) to hold the prices. These can be declared with this:
int item[100];
double price[100];
The elements of item range from item[0] to item[99] and the elements of price range from
price[0] to price[99]. When we store values in these arrays (see next), we will ensure that
price[0] holds the price of item[0];
price[1] holds the price of item[1];
and, in general,
price[i] holds the price of item[i].
8.3 Store Values in an Array
Consider the array score. If we wish, we could set selected elements to specific values, as follows:
score[3] = 56;
score[7] = 81;
199
www.it-ebooks.info