fputc, putc
From cppreference.com
File input/output
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Defined in header <stdio.h>
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int fputc(
int ch, FILE
* stream )
;
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int putc(
int ch, FILE
* stream )
;
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Writes a character ch to the given output stream stream. putc() may be implemented as a macro and evaluate stream
Internally, the character is converted to unsigned char just before being written.
Parameters
| ch | - | character to be written |
| stream | - | output stream |
Return value
On success, returns the written character.
On failure, returns EOF and sets the error indicator (see ferror()) on stream.
Example
Shows putc with error checking
Run this code
#include <stdio.h> #include <stdlib.h> int main(void) { int ret_code = 0; for (char c = 'a'; (ret_code != EOF) && (c != 'z'); c++) ret_code = putc(c, stdout); // Test whether EOF was reached. if (ret_code == EOF && ferror(stdout)) { perror("putc()"); fprintf(stderr, "putc() failed in file %s at line # %d\n", __FILE__, __LINE__ - 7); exit(EXIT_FAILURE); } putc('\n', stdout); return EXIT_SUCCESS; }
Output:
abcdefghijklmnopqrstuvwxy
References
- C23 standard (ISO/IEC 9899:2024):
- 7.21.7.3 The fputc function (p: TBD)
- 7.21.7.7 The putc function (p: TBD)
- C17 standard (ISO/IEC 9899:2018):
- 7.21.7.3 The fputc function (p: TBD)
- 7.21.7.7 The putc function (p: TBD)
- C11 standard (ISO/IEC 9899:2011):
- 7.21.7.3 The fputc function (p: 331)
- 7.21.7.7 The putc function (p: 333)
- C99 standard (ISO/IEC 9899:1999):
- 7.19.7.3 The fputc function (p: 297)
- 7.19.7.8 The putc function (p: 299)
- C89/C90 standard (ISO/IEC 9899:1990):
- 4.9.7.3 The fputc function
- 4.9.7.8 The putc function
See also
| writes a character to stdout (function) |
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C++ documentation for fputc, putc
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