This header was originally in the C standard library as <stdio.h>.
This header is part of the C-style input/output library.
Types
FILE | type, capable of holding all information needed to control a C I/O stream |
fpos_t | type, capable of uniquely specifying a position in a file |
unsigned integer type returned by the sizeof operator (typedef) |
Macros
| implementation-defined null pointer constant (macro constant) | |
| stdinstdoutstderr | expression of type FILE* associated with the input streamexpression of type FILE* associated with the output streamexpression of type FILE* associated with the error output stream (macro constant) |
| EOF | integer constant expression of type int and negative value (macro constant) |
| FOPEN_MAX | number of files that can be open simultaneously (macro constant) |
| FILENAME_MAX | size needed for an array of char to hold the longest supported file name (macro constant) |
| BUFSIZ | size of the buffer used by std::setbuf (macro constant) |
| _IOFBF_IOLBF_IONBF | argument to std::setbuf indicating fully buffered I/Oargument to std::setbuf indicating line buffered I/Oargument to std::setbuf indicating unbuffered I/O (macro constant) |
| SEEK_SETSEEK_CURSEEK_END | argument to std::fseek indicating seeking from beginning of the fileargument to std::fseek indicating seeking from the current file positionargument to std::fseek indicating seeking from end of the file (macro constant) |
| TMP_MAX | maximum number of unique filenames that can be generated by std::tmpnam (macro constant) |
| L_tmpnam | size needed for an array of char to hold the result of std::tmpnam (macro constant) |
Functions
File access | |
| opens a file (function) | |
| open an existing stream with a different name (function) | |
| closes a file (function) | |
| synchronizes an output stream with the actual file (function) | |
| sets the buffer for a file stream (function) | |
| sets the buffer and its size for a file stream (function) | |
Direct input/output | |
| reads from a file (function) | |
| writes to a file (function) | |
Unformatted input/output | |
Narrow character | |
| gets a character from a file stream (function) | |
| gets a character string from a file stream (function) | |
| writes a character to a file stream (function) | |
| writes a character string to a file stream (function) | |
reads a character from stdin (function) | |
| (until C++14) | reads a character string from stdin (function) |
writes a character to stdout (function) | |
writes a character string to stdout (function) | |
| puts a character back into a file stream (function) | |
Formatted input/output | |
Narrow/multibyte character | |
reads formatted input from stdin, a file stream or a buffer (function) | |
| (C++11)(C++11)(C++11) | reads formatted input from stdin, a file stream or a bufferusing variable argument list (function) |
| (C++11) | prints formatted output to stdout, a file stream or a buffer (function) |
| (C++11) | prints formatted output to stdout, a file stream or a bufferusing variable argument list (function) |
File positioning | |
| returns the current file position indicator (function) | |
| gets the file position indicator (function) | |
| moves the file position indicator to a specific location in a file (function) | |
| moves the file position indicator to a specific location in a file (function) | |
| moves the file position indicator to the beginning in a file (function) | |
Error handling | |
| clears errors (function) | |
| checks for the end-of-file (function) | |
| checks for a file error (function) | |
displays a character string corresponding of the current error to stderr (function) | |
Operations on files | |
| erases a file (function) | |
| renames a file (function) | |
| creates and opens a temporary, auto-removing file (function) | |
| returns a unique filename (function) | |
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