|
Arrays
can have any legal variable name, but they cannot
have the same name as another variable or array
within their scope. Therefore, you cannot have an
array named myCats[5] and a variable named myCats
at the same time.
You
can dimension the array size with a const or with
an enumeration. Listing 11.3 illustrates this.
Listing
11.3. Using consts and enums in arrays.
1:
// Listing 11.3
2:
// Dimensioning arrays with consts and enumerations
3:
4:
#include <iostream.h>
5:
int main()
6:
{
7:
enum WeekDays { Sun, Mon, Tue,
8:
Wed, Thu, Fri, Sat, DaysInWeek };
9:
int ArrayWeek[DaysInWeek] = { 10, 20, 30, 40, 50,
60, 70 };
10:
11:
cout << "The value at Tuesday is: " <<
ArrayWeek[Tue];
12:
return 0;
13:
}
OUTPUT:
The value at Tuesday is: 30
ANALYSIS: Line 7 creates an enumeration
called WeekDays. It has eight members. Sunday is
equal to 0, and DaysInWeek is equal to 7.
Line
11 uses the enumerated constant Tue as an offset
into the array. Because Tue evaluates to 2, the
third element of the array, DaysInWeek[2], is returned
and printed in line 11.
|