Export (0) Print
Expand All
div
eof
Expand Minimize
This topic has not yet been rated - Rate this topic

getc, getwc

Read a character from a stream.

int getc( 
   FILE *stream 
);
wint_t getwc( 
   FILE *stream 
);
stream

Input stream.

Returns the character read. To indicate a read error or end-of-file condition, getc returns EOF, and getwc returns WEOF. For getc, use ferror or feof to check for an error or for end of file. If stream is NULL, getc and getwc invoke the invalid parameter handler, as described in Parameter Validation. If execution is allowed to continue, these functions return EOF (or WEOF forgetwc) and set errno to EINVAL.

See _doserrno, errno, _sys_errlist, and _sys_nerr for more information on these, and other, error codes.

Each routine reads a single character from a file at the current position and increments the associated file pointer (if defined) to point to the next character. The file is associated with stream.

These functions lock the calling thread and are therefore thread-safe. For a non-locking version, see _getc_nolock, _getwc_nolock.

Routine-specific remarks follow.

Routine

Remarks

getc

Same as fgetc, but implemented as a function and as a macro.

getwc

Wide-character version of getc. Reads a multibyte character or a wide character according to whether stream is opened in text mode or binary mode.

Generic-Text Routine Mappings

TCHAR.H routine

_UNICODE & _MBCS not defined

_MBCS defined

_UNICODE defined

_gettc

getc

getc

getwc

Routine

Required header

getc

<stdio.h>

getwc

<stdio.h> or <wchar.h>

For additional compatibility information, see Compatibility in the Introduction.

// crt_getc.c
// Use getc to read a line from a file.

#include <stdio.h>

int main()
{
    char buffer[81];
    int i, ch;
    FILE* fp;
    
    // Read a single line from the file "crt_getc.txt". 

    fopen_s(&fp, "crt_getc.txt", "r");
    if (!fp)
    {
       printf("Failed to open file crt_getc.txt.\n");
       exit(1);
    }

    for (i = 0; (i < 80) && ((ch = getc(fp)) != EOF)
                         && (ch != '\n'); i++)
    {
        buffer[i] = (char) ch;
    }
       
    // Terminate string with a null character 
    buffer[i] = '\0';
    printf( "Input was: %s\n", buffer);

    fclose(fp);
}
Line one.
Line two.
Input was: Line one.
Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback
Show:
© 2014 Microsoft. All rights reserved.