Table [tab:util.hdr.ctime] describes the header <ctime>.
| Type | Name(s) | |||
| Macros: | NULL | CLOCKS_PER_SEC | ||
| Types: | size_t | clock_t | time_t | |
| Struct: | tm | |||
| Functions: | ||||
| asctime | clock | difftime | localtime | strftime |
| ctime | gmtime | mktime | time | |
The contents are the same as the Standard C library header <time.h>.232 The functions asctime, ctime, gmtime, and localtime are not required to avoid data races ([res.on.data.races]).
See also: ISO C Clause 7.12, Amendment 1 Clause 4.6.4.
strftime supports the C conversion specifiers C, D, e, F, g, G, h, r, R, t, T, u, V, and z, and the modifiers E and O.