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#include 

#include 

#include 

int virtual_getc_file(void *sp, const void *obj)

// get next chat from file obj, save point is ptr to string char ptr

{

    FILE *f = (FILE *)obj;

    return fgetc(f);

}

void virtual_ungetc_file(void *sp, int c, const void *obj)

// if can, one step back savepoint in s

{

    FILE *f = (FILE *)obj;

    if (f) ungetc(c, f);

}

int vfscanf ( FILE * stream, const char * format, va_list arg )

{

    return format_scan(stream, format, arg, &virtual_getc_file, &virtual_ungetc_file);

};

int fscanf ( FILE * stream, const char * format, ...)

{

   va_list      arg;

   int  n;

   va_start(arg, format);

   n = vfscanf(stream, format, arg);

   va_end(arg);

   return n;

}