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The C date and time functions are a group of functions in the standard library of the C programming language implementing date and time manipulation operations. [1] They provide support for time acquisition, conversion between date formats, and formatted output to strings.
The C programming language provides many standard library functions for file input and output.These functions make up the bulk of the C standard library header <stdio.h>. [1] The functionality descends from a "portable I/O package" written by Mike Lesk at Bell Labs in the early 1970s, [2] and officially became part of the Unix operating system in Version 7.
The C standard library is declared as a collection of header files. The C++ standard library is similar, but the declarations may be provided by the compiler without reading an actual file. C standard header files are named with a .h file name extension, as in #include <stdio.h>. Typically, custom C header files have the same extension.
The application programming interface (API) of the C standard library is declared in a number of header files. Each header file contains one or more function declarations, data type definitions, and macros. After a long period of stability, three new header files (iso646.h, wchar.h, and wctype.h) were added with Normative Addendum 1 (NA1), an ...
Header file Description First released C Standard ... File System information: Issue 4 <sys/time.h> Time and date functions and structures: Issue 4 <sys/times.h>
Each header from the C Standard Library is included in the C++ Standard Library under a different name, generated by removing the '.h ' file extension, and adding a ' c ' at the start; for example, 'time.h' becomes 'ctime'.
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<ctime> is a standard header file for C++, equivalent to the C standard library header, <time.h> st_ctime, a member of the stat structure specifying the last inode change time of a file in a Unix-like filesystem; CTime, a Microsoft ATL/MFC class for handling dates and times; CTime, a datatype in the Haskell programming language corresponding to ...