Using const and volatile

The keyword const
is one of the C++ features that is found in ANSI C. When an analogous keyword, volatile,
was invented by the ANSI C committee, in effect, the type qualifier category was created. This still remains one of the more nebulous parts of ANSI C.

This section is organized as follows:

• ``Types for lvalues''

• ``Type qualifiers in derived types''

• ``Using const to read character values''

• ``When to use volatile''