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headfirst设计模式 head 编程

要看懂head first设计模式要先具备哪些编程知识要先懂哪些编程语言要先看哪些书?socket编程为什么要选择AF_INET

admin admin 发表于2022-07-26 10:04:49 浏览132 评论0

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扩展资料:AF_INET和PF_INET之间的区别1. AF代表地址家庭地址家庭2. PF代表协议系列3. winsock2.h#define of_inet 0#define pf_inet af_inet,Posix是PF在功能socketPair和套接字的域参数中:af_unix,AF_INET与PF_INET完全相同4.在UNIX/Linux系统中,因为IPv4使用32位地址,AF_INET比AF_UNIX更常见,因为没有AF_UNIX的Windows上有AF_INET,af_local = pf_local,要看懂head first设计模式要先具备哪些编程知识要先懂哪些编程语言要先看哪些书I am a senior and I will graduate soon.我学的是嵌入式系统软件开发。

要看懂head first设计模式要先具备哪些编程知识要先懂哪些编程语言要先看哪些书

I am a senior and I will graduate soon.我学的是嵌入式系统软件开发,侧重于软件方面,个人以为是这样:C语言是基础,先学习一点C语言,得是嵌入式C语言(嵌入式C着重于理解为什么,而不只是会Use), then learn a little object -oriented program明. Then involve a little bit of electronic technology foundation, do not need to be proficient in numbers with the simulation circuit, as long as you can understand the simple circuit schematic diagram. (Because I learned embedded software development, it focuses on software. You can based on your own situation. If you focus on hardware, of course, you need to learn the digital simulation circuit.) Next, learn a embedded processor architecture, Personally recommend 32 -bit processors, like ARM, because the 8 -bit processing of embedded software is a bit too low. Most of them can only be used as simple industrial control. There is no complex software system and cannot be called an embedded system. Finally, learn a embedded operating system, such as Linux, WINCE, etc. Linux may be better because it is open source, huh. Other things are based on your hobbies, like an embedded network application, the operating system has studied what you look at first.

socket编程为什么要选择AF_INET

选择AF_INET的目的是使用IPv4进行通信。因为IPv4使用32位地址,而IPv6的128位,计算更快,这对于LAN通信非常方便。

AF_INET比AF_UNIX更常见,因为没有AF_UNIX的Windows上有AF_INET。

注意:AF_INET(也称为PF_INET)是IPv4网络协议的类型,AF_INET6是IPv6;AF_UNIX是UNIX系统的本地通信。

扩展资料:

AF_INET和PF_INET之间的区别

1. AF代表地址家庭地址家庭

2. PF代表协议系列

3. winsock2.h

#define of_inet 0

#define pf_inet af_inet,因此在Windows中,AF_INET与PF_INET完全相同

4.在UNIX/Linux系统中,两种版本中的两个差异很小。对于BSD,是AF,Posix是PF

在功能socketPair和套接字的域参数中:af_unix,af_local,af_inet,pf_unix,pf_local,pf_inet。

这些参数包括:af_unix = af_local,pf_unix = pf_local,af_local = pf_local,af_inet = pf_inet。

对于SocketPair和插座的域参数,请使用PF_LOCAL系列,以及初始化接口地址结构时,请使用AF_LOCAL。

例如:z =套接字(pf_local,sock_stream,0);adr_unix.sin_family = af_local;

求linux shell 中if的写法


主要是格式问题:
if ; then
echo -e “\033[41;37m $sj $jg \033[5;m“
elif ; then
echo -e “\033[42;37m $sj $jg \033[1;m“
fi
注意中间的空格,假如是字符串匹配,最好加上引号。
-head