Which C Standard Library Headers Explicitly Include Others?

Which Headers in the C Standard Library Include Others?

In general, programmers should not assume that one C standard library header will include another. However, there are certain exceptions where one header is explicitly required to include or provide functionality of another.

Included Headers

• is included by:

• includes:

• includes:

• includes:

Functions Available Without Explicit Header Inclusion

• The functions begin, end, their C 14 c-, r-, and cr- versions, and the C 17 functions size, empty, and data are defined in but are also available when any of the following headers are included:
• When is included, the begin and end functions and the generic swap overloads are available, but size, empty, and data are not.

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