Programs to be written should be kept away from computers

I recently want to understand some things. Best writeProgramIs not in front of your computer, rather than using your compiler, IDE, or other tools. The best thing is a place to stay away from these tools-something that can take you

Stdio and stdin_fileno

1. stdio 2. stdin_fileno Inconsistent data types:The stdin type is file *, pointing to a struct pointer. It belongs to the standard I/O and is implemented by the Standard C library. It is an advanced input function, which is defined in the

How to read paper efficiently

1. Niu Ren(From PhD to now, I have published 12 paper articles and 7 first author articles .) I still keep reading at least 2-3 documents every day. reading documents has different reading methods. however, the most important thing is to summarize

Fedora 15 allows root users to log on to desktops and desktop icons

1. fedora 15 use root to log on to Gnome First, enter the terminal with the user account, and allow the root account to log on:$ Su$ VI/etc/PAM. d/TPDDelete the line auth required pam_succeed_if.souser! = Root quiet: WQ: Save and exit.$ VI/etc/PAM.

The layer settings of protel99 are separated from the inner electrical layer

The electrical layers of protel99 are divided into two types, open a PCB design document press, shortcut key L, the layer settings window appears. A signal layer on the left is a positive layer, including top layer, bottom layer, and midlayer. The

In the electronic product development process, engineers insist on drilling, refining, and changing ......

As an electronic engineer, various problems are inevitable during product development and debugging. Some problems often make us unable to eat and sleep, and that feeling is unclear (who wants us to be a responsible Engineer ). However, with the

Section 3rd create and set intermediate layers

The middle layer is the layer between the top and bottom layers of the PCB Board. For the structure, see Figure 11-1. You can refer to the annotations in the figure for understanding. How is the middle layer implemented in the production process?

Section 3 multi-board design principles

In this chapter and the previous chapters, we have already emphasized some principles that need to be followed in PCB design. Here we will summarize these principles, it can be used as a reference for readers during design and also as a reference

Arrange the chief account

The best way to arrange the editor number is to use dynamic allocation by default, and leave the option permission to specify the editor number during loading, or even during compilation. scull works in this way; it uses a global variable

Qt progress bar implementation

1 Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 // progressbar.h 2 3 #ifndef PROGRESSBAR_H 4 #define PROGRESSBAR_H 5 #include 6 class QLabel; 7 class QLineEdit; 8 class QComboBox; 9

Qt File Processing

Qt provides the qfile class for file processing. To make it easier to process text files or binary files, QT also provides the qtextstream class and qdatastream class. You can use qtemporaryfile to process temporary files, you can use qfileinfo to

Circular linked list)

A circular linked list is a chain table that is connected at the beginning and end.1. Circular linked list(1) single-cycle linked list-in a single-chain table, change the pointer field null of the terminal node to the header node or the Start Node.(2

Use wildcards in rules

Use wildcards in rules If we want to define a series of similar files, we naturally think of using wildcards. Make supports three wildcards: "*", "?" And "[...]". This is the same as the Unix B-shell. Tilde ("~") Characters are also used in file

Do not be an impetuous embedded engineer ~

Copy a post on the Internet:1. Don't see others' replies. In the first sentence, let's say: Give a code! You should think about why. When you come up with other people's tips, you will know the differences between yourself and others.2. Do not read

Single-chain table operation

1. Create a single-chain tableAssume that the data type of a node in a linear table is a character. We enter these two nodes one by one and use the linefeed '\ n' as the terminator of the input condition. There are two common methods to dynamically

Considerations for defining variables in different Memory Spaces (Data xdata bdata) of C51 programming

1. The data zone has a small space, so only variables that are frequently used or require high computing speed are placed in the Data zone, such as the Count value in the for loop. 2. It is best to place local variables in the Data zone. Because the

How to read the code?

Original article: Why I love reading other people's code and you shoshould too by Alan skorkin Translation: Yurii    I hate reading code I found that many programmers hate to read code-please don't hide it, admit it. Almost everyone likes to write

What is pulling current and filling current?

When the output end of a logic gate is low, the current of the logic gate is called the filling current. The larger the filling current, the higher the low level of the output end. The output characteristic curve of the transistor shows that the

Change eth0 Nic name to eth1 in Ubuntu

This method is used to solve the problem where the new Nic is changed to eth1 and the source Nic name is eth0, which cannot be used by the new Nic. It can also be used to rename a nic. After the nic mac address is changed, find the NIC in Linux. The

Install fcitx Chinese Input Method in Ubuntu

Today, I tried to install fcitx In ubuntu (fcitx is a five-input pinyin method). Here is what I saw on my blog. I have successfully installed fcitx, now I will share it with you. Install fcitx 1 $sudo apt-get install fcitx Enter 1 $sudo gedit

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