Teach Yourself Borland C++ in 14 Days - portal

60 Day 2
C++Builder automatically adds sentries to units that you create as a
result of creating new forms or components. You should add sentries to
any headers you create for classes used outside the C++Builder VCL
framework.
A header file can contain more than one class or structure declaration. Using a separate header
for each class or structure helps keep your project organized and makes it easier to reuse classes
and structures in other programs. Sometimes you will group related classes together in one
header. For instance, you may have a class that implements a helper class to carry out its
duties. In that case, both the main class and the helper class would be declared in the same
header. Ultimately, it’s up to you how you organize your headers.
Don’t be too concerned if this is all a little fuzzy right now. It will probably take some
experience writing real programs for all this to come together for you.
An Example Using Structures
Listing 2.4 contains a program that has the user input three names and addresses and stores
those records in an array of structures. After the names are input, they are displayed on the
screen. The user is asked to choose one of the records. When the user chooses one of
the records, it is displayed on the screen. Listing 2.5 contains the header file for the
mailingListRecord structure used in the MAILLIST program shown in Listing 2.4.
Listing 2.4. MAILLIST.CPP.
1: #include
2: #include
3: #include
4: #pragma hdrstop
5: #include “structur.h”
6: void displayRecord(int, mailingListRecord mlRec);
7: int main(int, char**)
8: {
9: //
10: // create an array of mailingListRecord structures
11: //
12: mailingListRecord listArray[3];
13: cout