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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 library functions, including the ISO C standard ones, are widely used by programs, and are regarded as if they were not only an implementation of something in the C language, but also de facto part of the operating system interface. Unix-like operating systems generally cannot function if the C library is erased.
This is an accepted version of this page This is the latest accepted revision, reviewed on 17 February 2025. General-purpose programming language "C programming language" redirects here. For the book, see The C Programming Language. Not to be confused with C++ or C#. C Logotype used on the cover of the first edition of The C Programming Language Paradigm Multi-paradigm: imperative (procedural ...
Put, a Hypertext Transfer Protocol request method; Put, a File Transfer Protocol option to copy a file to a remote system; see List of FTP commands; Put, an output procedure in Pascal, Turing, and other programming languages In C, simple functions, puts and puts(), that put text on the screen
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.
conio.h is a C header file used mostly by MS-DOS compilers to provide console input/output. [1] It is not part of the C standard library or ISO C, nor is it defined by POSIX. This header declares several useful library functions for performing "istream input and output" from a program.
puts(), a function in the C programming language; Put option, a stock market instrument Naked put; People Under The Stairs, an American hip hop group; Premonitory Urge for Tics Scale, a measurement to assess urges in tic disorders; Presbyterian University and Theological Seminary
A built-in function, or builtin function, or intrinsic function, is a function for which the compiler generates code at compile time or provides in a way other than for other functions. [23] A built-in function does not need to be defined like other functions since it is built in to the programming language. [24]