how to insert and delete characters in the middle of file


 
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# 8  
Old 10-11-2004
FILE *fp = 0;

const char *path = "/the/path";

fp = fopen(path, "r+");

if (fp)
{
/* move to the appropriate location using fseek() */
/* perforn necessary updates */
fclose(fp);
}
else fprintf(stderr, "Cannot open file %s\n", path);

if u specify the "r+" option the file is opened for update (both reading and writing). u can navigate within the file using the fseek() lib function. this technique allows u to overwrite existing characters located anywhere within a file. i 've used it and it works.
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has_ic(3XCURSES)					  X/Open Curses Library Functions					  has_ic(3XCURSES)

NAME
has_ic, has_il - determine insert/delete character/line capability SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib -R /usr/xpg4/lib -lcurses [ library... ] c89 [ flag... ] file... -lcurses [ library... ] #include <curses.h> bool has_ic(void); bool has_il(void); DESCRIPTION
The has_ic() function determines whether or not the terminal has insert/delete character capability. The has_il() function determines whether or not the terminal has insert/delete line capability. RETURN VALUES
The has_ic() function returns TRUE if the terminal has insert/delete character capability and FALSE otherwise. The has_il() function returns TRUE if the terminal has insert/delete line capability and FALSE otherwise. ERRORS
None. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
libcurses(3XCURSES), attributes(5), standards(5) SunOS 5.11 5 Jun 2002 has_ic(3XCURSES)

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