Categories:
.NET (357)
C (330)
C++ (183)
CSS (84)
DBA (2)
General (7)
HTML (4)
Java (574)
JavaScript (106)
JSP (66)
Oracle (114)
Perl (46)
Perl (1)
PHP (1)
PL/SQL (1)
RSS (51)
Software QA (13)
SQL Server (1)
Windows (1)
XHTML (173)
Other Resources:
Using Macros for Contants
What is the benefit of using #define to declare a constant?
✍: FYIcenter
Using the #define method of declaring a constant enables you to declare a constant in one place and use it throughout your program. This helps make your programs more maintainable, because you need to maintain only the #define statement and not several instances of individual constants throughout your program.
For instance, if your program used the value of pi (approximately 3.14159) several times, you might want to declare a constant for pi as follows:
#define PI 3.14159
Using the #define method of declaring a constant is probably the most familiar way of declaring constants to traditional C programmers. Besides being the most common method of declaring constants, it also takes up the least memory. Constants defined in this manner are simply placed directly into your source code, with no variable space allocated in memory. Unfortunately, this is one reason why most debuggers cannot inspect constants created using the #define method.
2007-02-26, 6614👍, 0💬
Popular Posts:
Should synchronization primitives be used on overrided bean methods? No. The EJB specification speci...
How can you determine the size of an allocated portion of memory? You can't, really. free() can , bu...
How To Create an Array in PL/SQL? - Oracle DBA FAQ - Introduction to PL/SQL If you want create an ar...
Do You Know the Book "JUnit in Action"? You should know this book. It received some good reviews. Ti...
How To Test Transaction Isolation Levels? - MySQL FAQs - Transaction Management: Commit or Rollback ...