Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All
Expand Minimize

putc, putwc, putchar, putwchar

Write a character to a stream (putc, putwc) or to stdout (putchar, putwchar).

int putc(
   int c,
   FILE *stream 
);
wint_t putwc(
   wchar_t c,
   FILE *stream 
);
int putchar(
   int c 
);
wint_t putwchar(
   wchar_t c 
);

Parameters

c
Character to be written.
stream
Pointer to FILE structure.

Return Value

Returns the character written. To indicate an error or end-of-file condition, putc and putchar return EOF; putwc and putwchar return WEOF. For all four routines, use ferror or feof to check for an error or end of file.

Remarks

The putc routine writes the single character c to the output stream at the current position. Any integer can be passed to putc, but only the lower 8 bits are written. The putchar routine is identical to putc( c, stdout ). For each routine, if a read error occurs, the error indicator for the stream is set. putc and putchar are similar to fputc and _fputchar, respectively, but are implemented both as functions and as macros (see Choosing Between Functions and Macros). putwc and putwchar are wide-character versions of putc and putchar, respectively.

Generic-Text Routine Mappings

TCHAR.H routine _UNICODE & _MBCS not defined _MBCS defined _UNICODE defined
_puttc putc putc putwc
_puttchar putchar putchar putwchar

Requirements

Routine Required header Compatibility
putc <stdio.h> ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP
putwc <stdio.h> or <wchar.h> ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP
putchar <stdio.h> ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP
putwchar <stdio.h> or <wchar.h> ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP

For additional compatibility information, see Compatibility in the Introduction.

Libraries

All versions of the C run-time libraries.

Example

// crt_putc.c
/* This program uses putc to write buffer
 * to a stream. If an error occurs, the program
 * stops before writing the entire buffer.
 */

#include <stdio.h>

int main( void )
{
   FILE *stream;
   char *p, buffer[] = "This is the line of output\n";
   int  ch;

   ch = 0;
   /* Make standard out the stream and write to it. */
   stream = stdout;
   for( p = buffer; (ch != EOF) && (*p != '\0'); p++ )
      ch = putc( *p, stream );
}

Output

This is the line of output

See Also

Stream I/O Routines | fputc | getc | Run-Time Routines and .NET Framework Equivalents

Show:
© 2015 Microsoft