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<TITLE>Developer.com - Online Reference Library - 0672311739:RED HAT LINUX 2ND EDITION:gawk Programming</TITLE>
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<!-- ISBN=0672311739 //-->
<!-- TITLE=RED HAT LINUX 2ND EDITION //-->
<!-- AUTHOR=DAVID PITTS ET AL //-->
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<!-- PUBLICATION DATE=1998 //-->
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<A NAME="PAGENUM-581"><P>Page 581</P></A>
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<PRE>
printf("this is a second line of the header\n") > "report.txt";
}
This is the header for page 1
this is a second line of the header
the page number is now 0
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<P>The output is the same as that of Listing 27.6 except that the output shows up on the
printer instead of the screen. Before printing the file, you have to
close it.
</P>
<H3><A NAME="ch27_ 50">
Summary
</A></H3>
<P>This chapter provides you an introduction to the
awk programming language and the GNU awk: gawk. It is a very powerful and useful language that enables you to search for data,
extract data from files, create commands on-the-fly, or even create entire programs.
</P>
<P>It is very useful as a prototyping language—you can create reports very quickly. After
showing them to the user, changes can be made quickly also. Although it is less efficient than the
comparable program written in C, it is not so inefficient that you cannot create production
programs. If efficiency is a concern with an awk program, it can be converted into C.
</P>
<P>For further information, see the following:
</P>
<BLOCKQUOTE>
Aho, Alfred V., Brian W. Kernighan and Peter J.
Weinberger. The awk Programming<BR>
Language. Reading, Mass.: Addison-Wesley, 1988 (copyright AT&T Bell Lab).<BR>
See also the man pages for gawk on your system.<BR>
GNU awk, gawk, is available on this book's CD-ROM.<BR>
</BLOCKQUOTE>
<A NAME="PAGENUM-582"><P>Page 582</P></A>
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