lang/C/the.ansi.c.programming.language/notes.accompany.ansi.c/homework/PS1.html

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   6 <title>Assignment #1</title>
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   9 <H1>Assignment #1</H1>
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  15 <B>Intermediate C Programming
  16 <br>
  17 <br>
  18 UW Experimental College
  19 </B><br>
  20 <br>
  21 <B>Assignment #1
  22 </B><p><B>Handouts:
  23 </B></p><p>Syllabus
  24 <br><a href="PS1.html">Assignment #1</a>
  25 <br><a href="http://www.eskimo.com/~scs/cclass/int/sx1.html">Class Notes, Chapter 15</a>
  26 <br><a href="gamesource.html">Game source code</a>
  27 <br><a href="gameintro.html">Notes about ``The Game''</a>
  28 <p><B>Review Questions:
  29 </B></p><OL><li>What are the four parts of a structure definition?
  30 <li>What is <TT>p-&gt;m</TT> equivalent to?
  31 <li>What's wrong with this code?
  32 <pre>
  33         struct x *p = malloc(sizeof(struct x *));
  34 </pre>
  35 <li>The last code example in chapter 15 of the notes
  36 reads lines from <TT>stdin</TT> and prints them back out in
  37 reverse order.
  38 What would happen if the <TT>prepend</TT> function did not
  39 call <TT>malloc</TT> and <TT>strcpy</TT> to allocate space for
  40 a new copy of each listnode's item,
  41 but instead simply set
  42 <TT>newnode-&gt;item = newword</TT>?
  43 </OL><p><B>Exercises:
  44 </B></p><p>1.
  45 Get the initial version of the game
  46 (as handed out in class)
  47 to compile and run.
  48 It should print a ``?'' prompt,
  49 and you should be able to type the ``n'', ``s'',
  50 ``e'', and ``w'' commands to attempt to move around,
  51 and the ``take'' and ``drop'' commands
  52 to pick up and drop objects.
  53 (There are one or two other commands, which you can learn by
  54 studying the file <TT>commands.c</TT>.)
  55 <p>Study and understand as much of the source code of the game as you can.
  56 <p>2.
  57 Add a ``help'' command
  58 which prints a message listing the available verbs
  59 (or at least the most common ones).
  60 <p>3.
  61 Add a ``long description'' field
  62 to the <TT>object</TT> and <TT>room</TT> structures.
  63 (It can either be an array of <TT>char</TT> or a pointer to <TT>char</TT>.)
  64 Modify the initializations of the <TT>objects</TT> and
  65 <TT>rooms</TT> arrays in <TT>main.c</TT>
  66 to initialize the description field
  67 for some or all objects and rooms.
  68 Arrange that the ``look'' command
  69 print the long description of the current room
  70 (if it has one),
  71 and that the description is also printed
  72 when the actor enters a new room.
  73 Add an ``examine'' command
  74 which prints the long description of an object,
  75 if it has one.
  76 (Otherwise, have it print
  77 ``You see nothing special about the <TT>%s</TT>.'')
  78 <hr>
  79 <hr>
  80 <p>
  81 This page by <a href="http://www.eskimo.com/~scs/">Steve Summit</a>
  82 // <a href="copyright.html">Copyright</a> 1995-9
  83 // <a href="mailto:scs@eskimo.com">mail feedback</a>
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