used friend void append(SalesRecordPtr& head, SalesRecord& thisrecord) as my append fuction what should be in the question mark areas?
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SalesRecordPtr read_records(ifstream& in) // Allocate space for records & read them
// Parameters: Input stream, List of records.
// Returns : Pointer to list of records allocated.
// Calls : read(), append().
{ SalesRecord temp; // Temporary record in which to read data
? = NULL; // Initialize to NULL incase no records
// Peek ahead to see if there is anything in file
while (in.good() && !in.eof() && in.peek() != -1)
{ temp.read(in); // Read next record
append(?, temp); // Add record to end of list
}
} // End of read_records()
