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 ifstream             File Input Stream


            The ifstream class is used for file input in C++. The
    important member functions in this class are:

 istream &get(ch);    Get one char from stream associated with object
 char &ch;              Location to put character at

 istream &read(buf, num);     Read num bytes from this object's stream
 unsigned char *buf;    Data buffer
 int num;               Number of bytes to read

 void open(filename, mode, access);   Open a file.
 char *filename;        The file's name
 int mode;              Open mode:
                          in  = 0x01        Open for reading
                          out = 0x02        Open for writing
                          ate = 0x04        Seek to eof upon open
                          app = 0x08        Append mode
                          trunc = 0x10      Truncate file if already exists
                          nocreate = 0x20   Open fails if doesn't exist
                          noreplace = 0x40  Open fails if already exists
                          binary = 0x80     Binary (not text) file
 int access;            Access:
                          0 = Normal file
                          1 = Read-only file
                          2 = Hidden file
                          4 = System file
                          8 = Archive bit set

 void close();   Close file associated with this object (no parameters).

 int eof();      Return nonzero value when the end of the file is reached.

 istream &seekg(offset, origin);      Move data get pointer
 streamoff offset;      Type defined in IOSTREAM.H
 seek_dir origin;       Seek_dir is an enumeration; possible values:
                           ios::beg  =  Beginning
                           ios::cur  =  Current location
                           ios::end  =  End