The Practice of Programming

In the preface, the author illustrates four basic principles of programming - simplicity, clarity, generality, automation.

I suppose that everyone has his own programming experience and preference, but with predecessors' valuable guidence, chances are that we can write more beautiful code.

Pieces of summaries and abstracts are organized as follows:


Charpter 1 STYLE

The purpose of style is to make the code easy to read for yourself and others, and good style is crucial to good programming.

  Names

  • descriptive names for globals, short names for locals
  • names with p for pointers; initial capital letters for Globals; all capitals for CONSTANTS; active names for functions
  • be consistent

  Expressions and Statements

  • avoid negative expressions possibly
  • use parentheses in mixed unrelated operators
     the relational operators (< == !=) have higher precedence than the logical operators (&&  || );
    the logical operators bind tighter than assignment ( = );
    the bitwise operators (& |) have lower precedence than relational operators ( == )
  • break up complex expressions
  • be careful with side effects:  (e.g. the following expression is wrong)
    scanf("%d %d", &yr, &profit[yr]);X  

  Consistency and Idioms

  • Use a consistent indentation and brace style
  • Use idioms for consistency
    Wrong code:
    gets(buf);X  //never use 'gets', 'fgets' is better
    p = malloc(strlen(buf));
    strcpy(p, buf);X  //strlen does not count the '\0' that terminates a string, while strcpy copies it
    Right code:
    p = malloc(strlen(buf)+);
    strcpy(p, buf);
  • the return value from malloc, realloc, strdup, or any other allocation routine should always be checked

  Function Macros

  • One of the most serious problems with function macros is that a parameter that appears more than once in the definition might be evaluated more than once

  Magic Numbers

  • By giving names to the principal numbers in the calculation, we can make the code easier to follow

  • Define numbers as constants, not macros

    const int MAXROW = . MAXCOL = ;
    static final int MAXROW = , MAXCOL = ;
    C also has const values but they cannot be used as array bounds, so the enum statement remains the method of choice in C.
  • Use the language to calculate the size of an object

    sizeof (int)
    sizeof(array[])
    sizeof(buf)

  

  Comments

  • Comment functions and global data
  • Sometimes code is genuinely difficult, perhaps because the algorithm is complicated or the data structures are intricate. In that case, a comment that points to a source of understanding can aid the reader

  • Don't comment bad code, rewrite it

  • Don't contradict the code. When you change code, make sure the comments are still accurate

Book Review of "The Practice of Programming" (Ⅰ)的更多相关文章

  1. Book Review of “The practice of programming” (Ⅳ)

    The practice of programming Chapter 4 Interfaces A good programmer should always be good at designin ...

  2. Book Review of “The practice of programming” (Ⅲ)

    The practice of programming Chapter 3 Design and Implementation In this section, we focus on one kin ...

  3. Book Review of “The practice of programming” (Ⅱ)

    The practice of programming Chapter 2 Algorithms and Data Structures Searching sequential search (li ...

  4. 2015年第2本(英文第1本):《The Practice of Programming》

    2015年计划透析10本英文原著,最开始选定的第一本英文书是<Who Moved my Cheese>,可是这本书实在是太短.太简单了,总体的意思就是要顺应变化,要跳出自己的舒适区,全文不 ...

  5. net programming guid

    Beej's Guide to Network Programming Using Internet Sockets Brian "Beej Jorgensen" Hallbeej ...

  6. FRP represents an intersection of two programming paradigms.

    FRP represents an intersection of two programming paradigms. Functional programming Functional progr ...

  7. [转]9个offer,12家公司,35场面试,从微软到谷歌,应届计算机毕业生的2012求职之路

    1,简介 毕业答辩搞定,总算可以闲一段时间,把这段求职经历写出来,也作为之前三个半月的求职的回顾. 首先说说我拿到的offer情况: 微软,3面->终面,搞定 百度,3面->终面,口头of ...

  8. 9个offer,12家公司,35场面试,从微软到谷歌,应届计算机毕业生的2012求职之路

    1,简介 毕业答辩搞定,总算可以闲一段时间,把这段求职经历写出来,也作为之前三个半月的求职的回顾. 首先说说我拿到的offer情况: 微软,3面->终面,搞定 百度,3面->终面,口头of ...

  9. (转)9个offer,12家公司,35场面试,从微软到谷歌,应届计算机毕业生的2012求职之路

    原文:http://www.cnblogs.com/figure9/archive/2013/01/09/2853649.html 1,简介 毕业答辩搞定,总算可以闲一段时间,把这段求职经历写出来,也 ...

随机推荐

  1. java . -- IDEA运行最简单的Java程序Hello World

    以下内容基于IDEA, JAVA EE已经安装好的情况. 如果没有安装好,网上的安装教程非常多的. 下面开始,18个图解 点击Finish 运行的代码如下: public class HelloWor ...

  2. 一入python深似海--变量和对象

    一.基本原理 Python中一切都是对象,变量是对象的引用. 这是一个普遍的法则.我们举个样例来说.Python是怎样来处理的. x = 'blue' y = 'green' z = x 当pytho ...

  3. 邮件发送模型及其Python应用实例

    SMTP(Simple Mail Transfer Protocol) 制定: First:RFC 788 in 1981 Last:RFC 5321 in 2008 端口: TCP 25(SMTP) ...

  4. dubbo zookeeper报错failed to connect to server , error message is:No route to host

    failed to connect to server , error message is:No route to host 转自:http://blog.csdn.net/miaohongyu1/ ...

  5. Minecraft Forge编程入门一 “环境搭建”

    什么是Forge Minecraft Forge is a Minecraft application programming interface (API) which allows almost ...

  6. JDK源码分析之concurrent包(四) -- CyclicBarrier与CountDownLatch

    上一篇我们主要通过ExecutorCompletionService与FutureTask类的源码,对Future模型体系的原理做了了解,本篇开始解读concurrent包中的工具类的源码.首先来看两 ...

  7. Chomsky_hierarchy

      Grammar Languages Automaton Production rules (constraints) Type-0 Recursively enumerable Turing ma ...

  8. 第09章—使用Lombok插件

    spring boot 系列学习记录:http://www.cnblogs.com/jinxiaohang/p/8111057.html 码云源码地址:https://gitee.com/jinxia ...

  9. 删除Windows服务

    或者开始→运行 ,输入“regedit”,在HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services 下找到需要删除的服务名,直接删除即可.

  10. 【sed / awk脚本编写】

    awk awk分为BEGIN部分,正则匹配部分,END部分三部分. 我一般在BEGIN部分定义一些变量,正则部分用于匹配和执行一些解析和统计,END部分用于输出结果. 总体结构: awk 'BEGIN ...