Hi: I need your help to solve a c program

                   Question:

                   If we have to write certain tags in an HTML page
                  multiple times, it may be easier to define a
                  constant once and replace it (much
                   like the #define in C). For example, if I have to
                  add a hyperlink to http://www.*-*-*.com/ . I could
                  type:
                    http://www.*-*-*.com/

                   which will show up as http://www.*-*-*.com/
                  web browser. I would prefer to do the following.
                    #define LINK(string)
                  http://www.*-*-*.com/
                    . . .
                    LINK(people)<br>
                    LINK(courses)<br>

                   so that I can use it more than one times. My
                  program will do the preprocessing before I put the
                  page on the web. The output
                   of the file should look somthing like.
                    . . .
                    http://www.*-*-*.com/ ;br>
                    http://www.*-*-*.com/ ;br>

                   The link is just one examples. There are as much
                  as 10 defines. fopen function cannot be used, the
                  unix command line will read input file and give
                  outputfile.
                   Thank you very much.

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