12.3.1. Design of the Query Program
A good way to start the design of a program is to list the program’s operations. Knowing what operations we need can help us see what data structures we’ll need. Starting from requirements, the tasks our program must do include the following:
• When it reads the input, the program must remember the line(s) in which each word appears. Hence, the program will need to read the input a line at a time and break up the lines from the input file into its separate words
• When it generates output,
– The program must be able to fetch the line numbers associated with a given word
– The line numbers must appear in ascending ...
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