need of fseek() in c

Question

Part of Code 1:-

while(1)
    {
        ch=fgetc(pt);
        if(c==EOF)
        {
            break;
        }
        if(c==\' \')
        {
            f         


        

Answer 1

The use of fseek() here - The C standard requires a positioning operation between a read and a write operation on an update stream, or between a write and a read. This is a positioning operation between a write and a read. It is not a no-op; it places the stream into a mode which allows the next fgetc() to work correctly, reliably, across platforms, as required by the C standard.

EDIT:

2 fseek() calls are required because the first one acts as the "no-op" call between an fgetc() and a subsequent fputc() call. After the fputc(), the second one acts as the "no-op" between the fputc() and the subsequent fgetc() call. (since a loop is running)