October 2010
Beginner to intermediate
624 pages
24h 9m
English
Content preview from Making Software
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A Sample Measurement
Table 8-1 contains a summary of all the metrics used in this study, and the symbols denoting these metrics in the rest of the tables and figures.
Table 8-1. Selected metrics for the study
| Variable | Metric (symbol) |
|---|---|
| Size | Source Lines of Code (SLOC), Lines of Code (LOC) |
| Number of C functions (FUNC) | |
| Complexity | McCabe’s cyclomatic complexity—maximum of all functions (MCYCLO) |
| McCabe’s cyclomatic complexity—average (ACYCLO) | |
| Halstead’s length (HLENG), volume (HVOLUM), level (HLEVE), and mental discriminations (HMD) |
The elements of code that provide input to all these metrics are illustrated in the
sample source code file shown in Example 8-2. This file was extracted from the
package
urlgfe, a cross-platform download manager. (urlgfe has recently changed its name to uget, so it is no longer found in the ArchLinux repositories
with its original name.) The file contains preprocessor directives (such as 
), comments (such as 
), and
only one function (starting at line 
) containing a while loop.
Example 8-2. A sample C source code file
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/* Specification. ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.