6 - Structures

Exercise 6-1

Our version of getword does not properly handle underscores, string constants, comments, or preprocessor control lines. Write a better version. [1]

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Exercise 6-2

Write a program that reads a C program and prints in alphabetical order each group of variable names that are identical in the first 6 characters, but different somewhere thereafter. Don't count words within strings and comments. Make 6 a parameter that can be set from the command line. [1]

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Official solution

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Exercise 6-3

Write a cross-referencer that prints a list of all words in a document, and, for each word, a list of the line numbers on which it occurs. Remove noise words like "the," "and," and so on. [1]

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Official solution

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Exercise 6-4

Write a program that prints the distinct words in its input sorted into decreasing order of frequency of occurrence. Precede each word by its count. [1]

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Exercise 6-5

Write a function undef that will remove a name and definition from the table maintained by lookup and install. [1]

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Exercise 6-6

Implement a simple version of the #define processor (i.e., no arguments) suitable for use with C programs, based on the routines of this section. You may also find getch and ungetch helpful. [1]

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Official solution

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