CSE 80 -- Lecture 9 -- Feb 4

Topics went over in class today;

Noted that the standard deviation formula given in class was missing a square.
awk versus nawk, user-defined functions and built-in arithmetic functions, with a digression to Newton's method for approximating the square root if using an old version of awk (e.g., awk on Solaris) without the arithmetic built-in functions.

c2html:

#!/bin/sh
echo "<html>
<head>
<title>$1</title>
</head>
<body>
<h1>$1</h1>"
<pre>"
sed '
s/&/\&amp;/g
s/</\&lt;/g
s/>/\&gt;/g
s,^\([ \t]*#[ \t]*include[ \t][ \t]*&lt;\)\(.*\)&gt;,\1<a href="file://localhost/usr/include/\2">\2</a>\&gt;,
' < "$1"
echo "</pre>
<hr>
<!-- extra footer stuff -->
</body></html>
"

The viewpoint that c2html as a type converter, converting a C program into an HTML view of the same program.
The compilation process as a type conversion, converting C/C++ programs to relocatable object files and relocatable object files to executables. Undefined external references, relocation, link editing (ld automatically being run by cc -o).
Dependency graph. Example: main.c, globals.h, and utils.c source files, where both the C files includes the .h file. The generated relocatable object files main.o and utils.o depend on their respective .c files as well as the header file globals.h. The final executable, main, depends only on the two .o files.
make syntax. make macros (looks like shell variables, but are not). make dependency rules encoding the dependency information.

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