putchar
From cppreference.com
Defined in header <stdio.h> | ||
int putchar(int ch ); | ||
Writes a character ch to stdout. Internally, the character is converted to unsignedchar just before being written.
Equivalent to putc(ch, stdout).
Contents |
[edit]Parameters
| ch | - | character to be written |
[edit]Return value
On success, returns the written character.
On failure, returns EOF and sets the error indicator (see ferror()) on stdout.
[edit]Example
Shows putchar 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 = putchar(c); // Test whether EOF was reached.if(ret_code ==EOF&&ferror(stdout)){fprintf(stderr, "putchar() failed in file %s at line # %d\n", __FILE__, __LINE__ -6);perror("putchar()");exit(EXIT_FAILURE);} putchar('\n'); // putchar return value is not equal to the argumentint r =0x1070;printf("\n0x%x\n", r); r = putchar(r);printf("\n0x%x\n", r);}
Output:
abcdefghijklmnopqrstuvwxy 0x1070 p 0x70
[edit]References
- C23 standard (ISO/IEC 9899:2024):
- 7.21.7.8 The putchar function (p: TBD)
- C17 standard (ISO/IEC 9899:2018):
- 7.21.7.8 The putchar function (p: TBD)
- C11 standard (ISO/IEC 9899:2011):
- 7.21.7.8 The putchar function (p: 333)
- C99 standard (ISO/IEC 9899:1999):
- 7.19.7.9 The putchar function (p: 299)
- C89/C90 standard (ISO/IEC 9899:1990):
- 4.9.7.9 The putchar function
[edit]See also
| writes a character to a file stream (function) | |
C++ documentation for putchar | |
