getwc

Name

fgetwc, getwc, getwchar
- read a wide character from a FILE stream

Library

libc.lib

Synopsis

#include <stdio.h>

#include <wchar.h>

wint_t fgetwc (FILE *stream);

wint_t getwc (FILE *stream);

wint_t getwchar

Return values

If successful, these routines return the next wide character from the stream. If the stream is at end-of-file or a read error occurs, the routines return WEOF. The routines feof and ferror must be used to distinguish between end-of-file and error. If an error occurs, the global variable errno is set to indicate the error. The end-of-file condition is remembered, even on a terminal, and all subsequent attempts to read will return WEOF until the condition is cleared with clearerr.

Detailed description

The fgetwc function obtains the next input wide character (if present) from the stream pointed at by stream, or the next character pushed back on the stream via ungetwc.

The getwc function acts essentially identical to fgetwc.

The getwchar function is equivalent to getwc with the argument stdin.

Examples

/* Illustrates how to use fgetwc API */
#include <stdio.h>
#include <wchar.h>
wint_t example_fgetwc(void)
{
 FILE *fp = NULL;
 wint_t retval;
 
 /* opening the input file */
 fp = fopen("input.txt","r");
 if(fp == NULL)
 {
  wprintf(L"Error: File open\n");
  return (-1);
 }
 /* Read a character from the opened file */
 retval = fgetwc(fp);
 /* Close the file open for reading */
 fclose(fp);
 /* return the character read from the file */
 return (retval);
}

/* Illustrates how to use getwc API */
#include <stdio.h>
#include <wchar.h>
wint_t example_getwc(void)
{
 FILE *fp =  NULL;
 wint_t retval;
 
 /* opening the input file */
 fp = fopen("input.txt","r");
 if(fp == NULL)
 {
  wprintf(L"Error: File open\n");
  return (-1);
 }
 /* Read a character from the opened file */
 retval = getwc(fp);
 /* Close the file open for reading */
 fclose(fp);
 /* return the character read from the file */
 return (retval);
}

/* Illustrates how to use getwchar API */
#include <stdio.h>
#include <wchar.h>
wint_t example_getwchar(void)
{
 wint_t retval;
 
 /* Read a character from standard input */
 retval = getwchar();
 /* return the character read */
 return (retval);
}

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