tenth decimal

1. Inverter circuitThe reverse process corresponding to rectification is called inversion (DC to alternating current). If the AC side of the converter is connected to the AC power supply, the DC inverse becomes the same frequency alternating current feedback to the power grid, it is called active inverter; if the AC side of the converter is connected to the load, the DC inverse becomes the alternating current supply load of a frequency or variable frequency, which is called passive inversion.2.

Perform the default action Ignore signal Capture signal: Perform signal processing function, switch to user state. Snapping: Signal functionsIgnore signal: sig_ignDefault action: SIG_DFL(3) Multi-signal processingProcessing method:1. Recursive, call the same handler function2. Ignoring a second signal3. Block the second signal until the first one is processedSixth section non-local jumpThe C language, the user-level exception control flow form, is provided through the setj

;Dir_ptr = Opendir (".");if (dir_ptr = = NULL) {Perror (".");Exit (1);}while ((DIRENTP = Readdir (dir_ptr)) = NULL)if (Direntp->d_ino = = Inode_to_find){strncpy (Namebuf, Direntp->d_name, Buflen);Namebuf[buflen-1] = ' + ';Closedir (DIR_PTR);Return}fprintf (stderr, "error looking for Inum%d\n", (int) inode_to_find);Exit (1);}ino_t Get_inode (char *fname){struct STAT info;if (stat (fname, info) = =-1) {fprintf (stderr, "cannot stat");Perror (fname);Exit (1);}return Info.st_ino;}Testioctl#include #

the speed at which the disk is written is much faster than reading and writing memory),Therefore, this requires Linux drivers are used only during the development phase PRINTK function output message, in formalFriend Cloth Linux may affect performance when driven. PRINTK function is removed. Of course, the easiest thing to think aboutmethod is to delete each PRINTK function, or comment PRINTK function. But it's a hassle, andwant to add later PRINTK functions are equally troublesome. To control

Title Link: http://acm.csu.edu.cn/OnlineJudge/problem.php?id=1507Problem-solving ideas: This is a simulation problem, read so many people's code, I think my code is the simplest, haha, in fact, the score changes in the time to calculate the lamp light number of complex, I was directly violentAC Code:#include #include#include#includeusing namespacestd;Const intm=45000;intc[Ten]={6,2,5,5,4,5,6,3,7,6};Chara[5],b[5];structnode{intx, Y, Z;} T[M];intMain () {intCa=1; while(1) { inti=-1, g=0, h=0,

This afternoon code for a PM, beginner python, hope to learn faster through their own code, it turns out that the code is really worth it, compile the time there are many errors, there are missing letters, comma period confusion and other low-level errors, through the software to the tips, slowly find, also solved, This is a game code, you can feel a little bit below, here are a few pictures:The above is part of the code, below to see the graph after the run:The effect is good, although code cod

in the console through the /dev/console device file.) The device file only works under the console of the character interface, so the printk function can output messages normally only on the console of the character interface.Variable-parameter macros:Unlike fixed-parameter macros, variable-parameter macros require variable parameters for variable-parameter macros through the _va_args_ macro, and the variable parameter Hongyu defines variadic functions in the same way, using 3 points ( ... ) to

system behaves in the same way as the device file system (/devSimilar/procis a virtual file system, which means that/procis not a real file system, but a memory map. All read and write/procOperations are both read and write to memory. So read and write The/proc file system is far faster than reading/writing/ dev file systems. As a result, the/proc file system can also serve as a tool for Linux to interact with user-space programs. my Blog Park address is: http://www.cnblogs.com/zzp036/p/544978

Through the tenth chapter, the debugging technology of embedded Linux driver development has been learned.Knowledge Learned:First, print kernel debug information: PRINTKthe PRINTK function is prototyped as follows:asmlinkage int PRINTK (const char * fmt, ...)The PRINTK file is a simple 4 -digit text file with the following default values:6 4 1 76: Output the message to the level of the console. 4: The default message log level. 1: Minimum value that c

preferredUse Optgroup to group, label to group name, disabled to disable grouping2. Multi-line text boxExplanation: Generates a multi-line text box that can be changed in size. The properties are as follows:Property name DescriptionName set when the file is submittedForm hooks a multi-line text box outside the form to a formReadOnly set multi-line text box read-onlyDisabled to disable multi-line text boxesMaxLength Setting the maximum number of characters that can be enteredAutofocus Get focusP

"! Return it is written in the function body!1. When the function body encounters the return keyword, then the code below it stops executing! Just jump out of the function!2. The main function of the return keyword is to return the data to the caller of the function! The concept of the return value!In a function either output or return but we define the function to return the result using return!Call Method: Alert (function name (parameter)), out of the warning window display;document.write (fun

; for(j=0; j) {sum=sum+Score[i][j]; } Average1[i]=(Double) sum/N; }}voidAveforsubject (intScore[m][n],Doubleaverage2[]) {inti,j,sum; for(j=0; j) {sum=0; for(i=0; i) {sum=sum+Score[i][j]; } Average2[j]=(Double) sum/l; }}voidScore (intScore[m][n]) { inti,j; for(i=0; i) {printf ("Please enter the grade of%d students \ n", i+1); for(j=0; j) {scanf ("%d",Score[i][j]); } }}2. Seek the sum of the elements of each row, column, and diagonal of any square.#include #defineN 100intMain ()

synchronize3 #server 0.rhel.pool.ntp.org Iburst4 #server 1.rhel.pool.ntp.org Iburst5 #server 2.rhel.pool.ntp.org Iburst6 #server 3.rhel.pool.ntp.org Iburst7 Server 172.25.254.254 Iburst2. Restart the Chronyd serviceSystemctl Restart Chronyd.service3. Test whether time synchronization is successfulChronyc sources-v****** Setting the time zone *******TIMEDATECTL Status/* View time zone settingsSet-time/* Set Current timeSet-timezone/* Set current time zoneSET-LOCAL-RTC 0|1/* Set whether to use UT

NULL.Create_proc_entη Port Name: Virtual file name. Port mode: Access rights to virtual files, equivalent to access to Linux files. Proc_ dir _ entry struct pointer for the parent directory of the virtual file. If the virtual file is created directly under/proc, the value of this parameter is NULL.Create_proc_read_en y Port Name: virtual file name. Port mode: Access rights to virtual files, equivalent to access to Linux files. Port Base: Proc_ dir _ entry struct pointer to the parent directory

The tenth chapter mainly studies the debugging technology of Embedded Linux.First I learned that the kernel debugging information should be printed: PRINTK. The PRINTK function has been used in many of the previous chapters. The function is similar to the printf function, with the PRINTK function running kernel space and the PRINTK function running in user space. In other words, Linux kernel programs like Linux drivers can only output debugging inform

Project name: Food chain Teaching ToolsGroup name: Fight, brother.Group leader: Huang XingMembers: Li Yuxing, du Qiao Linhai, Luan Sun, Wang DonghanUser usage reportsSurvey Time: 2016/11/10 12:10--2016/11/12 11:00Project Sharing Link: http://pan.baidu.com/s/1jIntV9sProject Promotion Way: QQ group, talk about; group chat, Friends CircleUser feedback: QQ, and other private messages48-Hour User count: 33 people：We have statistics on the user feedback, including the user's name (part of the pseudony

software to the appropriate students, teachers and other people, in order to increase the number of users, to obtain more and more effective user feedback.Compared to the previous NABCD:The needs of users are more explicit, but also a more detailed description, for the next software design and implementation of the function provides a clearer direction;To the user's demand, there is a more detailed solution, the method more specific;We have made a more detailed description of the various benefi

All logs in the 1.desktop host are directed to/var/log/westos(modified in server)2. Synchronize the logs in the desktop host to the server at all times(server IP is 172.25.10.11)Server modified/etc/rsyslog.conf 15th, line 16, remove #Desktop modifies/etc/rsyslog.conf line 55th, adds the server's IP at the end of the row, @ip udp,@ @ip as TCPBoth the receiving end and the sending end need to restart Rsyslog.serviceServer shuts down the firewallServer shuts down the firewall3. Set the system time

-aligned)/right (right-aligned)/center (centered).12. Modify the case of the text: The Text-transform property defines the case of the text for the style. Text-transform:capitalize let the first letter of each word capitalize, text-transform:uppercase all the letters uppercase, text-lowercase all the letters lowercase, text-transform: None lets the text remain the same.13. Decorate text: Text-decoration:underline to add an underscore, or enter overline to add an underscore, or enter Line-through

after mid-April, there was no control of the diet, Huchihaihe at night, and now the weight of the successful change back to India before the weight, 73KG. That is, in India nearly one months of dieting effect was returned to the prototype.Running 5 times in April, with a total running mileage of 90 km, including four half marathon. That means running training in April is largely deserted. And I signed up for the May 15 Wenchuan 50 km cross-race, really a bit of a dead feeling.All right, take a