getchar
From cppreference.com
C
Concurrency support (C11)
File input/output
Types and objects
Functions
File access
Unformatted input/output
(C95)(C95)
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Formatted input
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(C95)(C95)(C95)(C11)(C11)(C11)
(C99)(C99)(C99)(C11)(C11)(C11)
(C99)(C99)(C99)(C11)(C11)(C11)
Direct input/output
Formatted output
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File positioning
Error handling
Operations on files
(C11)
(C11)
Defined in header
<stdio.h>
int getchar( void );
Reads the next character from stdin .
[edit] Parameters
(none)
[edit] Return value
The obtained character on success or EOF on failure.
If the failure has been caused by end-of-file condition, additionally sets the eof indicator (see feof() ) on stdin . If the failure has been caused by some other error, sets the error indicator (see ferror() ) on stdin .
[edit] Example
Demonstrates getchar with error checking
Run this code
#include <stdio.h> #include <stdlib.h> int main(void) { for (int ch; (ch = getchar()) != EOF ;) // read/print "abcde" from stdin printf ("%c", ch); // Test reason for reaching EOF. if (feof (stdin )) // if failure caused by end-of-file condition puts ("End of file reached"); else if (ferror (stdin )) // if failure caused by some other error { perror ("getchar()"); fprintf (stderr, "getchar() failed in file %s at line # %d\n", __FILE__, __LINE__ - 9); exit (EXIT_FAILURE ); } return EXIT_SUCCESS ; }
Possible output:
abcde End of file reached
[edit] References
- C23 standard (ISO/IEC 9899:2024):
- 7.21.7.6 The getchar function (p: TBD)
- C17 standard (ISO/IEC 9899:2018):
- 7.21.7.6 The getchar function (p: TBD)
- C11 standard (ISO/IEC 9899:2011):
- 7.21.7.6 The getchar function (p: 332)
- C99 standard (ISO/IEC 9899:1999):
- 7.19.7.6 The getchar function (p: 298)
- C89/C90 standard (ISO/IEC 9899:1990):
- 4.9.7.6 The getchar function
[edit] See also
C++ documentation for getchar