C++.Coding.Standards.1918.Rules.Guidelines [Electronic resources] نسخه متنی

Discussion

Names add information and introduce a single point of maintenance; raw numbers duplicated throughout a program are anonymous and a maintenance hassle. Constants should be enumerators or

const values, scoped and named appropriately.

One

42 may not be the same as another

42 . Worse, "in-head" computations made by the programmer (e.g., "this

84 comes from doubling the

42 used five lines ago") make it tedious and error-prone to later replace

42 with another constant.

Prefer replacing hardcoded strings with symbolic constants. Keeping strings separate from the code (e.g., in a dedicated

.cpp or resource file) lets non-programmers review and update them, reduces duplication, and helps internationalization.