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const float pi = 3.14159f; float degrees; float radians; /* ... */ radians = degrees * pi / 180; |
Exceptions
DCL00-EX1: It is acceptable to define valueless macros to serve as "inclusion guards." That is, the macro serves to control the multiple inclusion of header files, as in the following example:
| Code Block |
|---|
#ifndef SOME_HEADER_H
#define SOME_HEADER_H
... // content of header file
#endif
|
See PRE06-C. Enclose header files in an inclusion guard for more information on inclusion guards.
Risk Assessment
Failing to const-qualify immutable objects can result in a constant being modified at runtime.
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