CSci351 Introduction to File Processing: Homework 2

Due date: Friday, February 15, 2008 in class
Each homework may have a different weight, which depends on its level of difficulty.
Absolutely no copying others' work

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1. Rewrite the extraction(>>) operator of the file readstr.cpp of Figure 4.4 (Page 124) in textbook, so that it uses the following field representations:     (70%)
   • Method 1, fixed length fields.
   
   
   
   
   
   
   • Method 2, fields with length indicators.
   
   
   
   
   
   
   • Method 4, fields with keyword tags.







2. Suppose you need to keep a file in which every record has both fixed- and variable-length fields. For example, suppose you want to create a file of employee records, using fixed-length fields for each employee's ID (primary key), sex, birth date, and department, and using variable length fields for each name and address.     (30%)
   • What advantages might there be to using such a structure?
   
   
   
   
   
   
   • Should we put the variable-length portion first or last?
   
   
   
   
   
   
   • Either approach is possible; how can each be implemented?