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Preface:
Naming rules for software released on the Internet. Although you can name your own released software, you still have a lot of conversations about the rules.
Article 1:
Version 1
1.1 Official version
Enhance: the enhanced version or enhanced version belongs to the official version.
Full Version: The full version belongs to the official version.
Release: release version with Time Limit
Upgrade: upgraded
Retail: Retail Edition
Plus: enhanced version. However, most of these enhancements ar
Read the program "simple C + + Student Information Management system", to find out the occurrence of the structure function, friend function, operator overloading, static number member syntax phenomenon appears, carefully understand its usage, in the future design can be flexible application of the methods and techniques.#include Operation Result:Nineth Week program
"Preface" in the QT database use case "contact"--using SQLite and Qstringlistmodel, we wrote this program, how to package it as a setup file to send to other small partners?We useNsis-2.46-setup.exe "point me to download" Nisedit2.0.3.exe "point me to download" the two software. TargetWe will be making the installation package effect."Install and Run""Source Download"Http://pan.baidu.com/s/1qWLUqWOStepsAfter we developed the
; - } - } - returnresult; +}
SQL Security
For the front-end request of the ordinary text box, must be done before warehousing to prevent SQL statement check, in the Common Rights Management code, we generally use strong type of entity for database deletion and modification, do not apply the way of splicing SQL statements Database operations, I have been very disgusted splicing SQL and then submit d
management. If the superior and the top superiors send orders to their employees at the same time, if the commands of the leaders are different, especially when they are in conflict, who should the employees listen? The top boss may affect your bonus, and the superior leadership decides your stay. This "political and political" situation will make employees feel embarrassed and at a loss!In the real environment, this is not uncommon. There are always
Work Management
at the end of the command, you can add the command to the background [ctrl]-z the current job into the background "pause" jobs view the current background of the work statusJobs "Parameters"Parameters:-L: List PID numbers in addition to the jobs number and command string-R: Lists only the work being run in the background-S: Lists only the work that is paused in the backgroundFG backstage work get the front desk to handleExample:
ret;char * TMP_BUF;printf ("I is%d\n", i);for (i=0;i{Sleep (1000);printf ("Sleep%d seconds\n", i);}Hello1 () before execution, probably 0.2MBRet=hello1 ();After execution, it's probably 0.4MB.Hello2 ();Hello2 () After execution, it's probably 0.7MB.Hello3 ();Hello3 () is still 0.7MB after execution, indicating that in a Windows system, the stack space will always increase without decreasing, but generally does not exceed the compiler default stack size (the programmer does not change the case)p
Rpm for Linux program package managementRpm Introduction
Rpm (Red Hat Package Manager) is an open software Package management system. It works in Red Hat Linux and other Linux systems and has become a widely recognized software package management standard in Linux.
Rpm packages each component file of the compiled application into one or several package files to f
Reprint please indicate the source, http://blog.csdn.net/suool/article/details/38406211, thank you!Linux process storage structure and process structure executable file structureSuch as:As you can see, this elf executable file is stored (not into memory) into the code area, the data area, and the non-out data area three parts.Code area: A machine instruction that holds the execution of the CPU.Data area: Contains static variables that have been initialized in the
ing segment. Here, the kernel maps the file content directly to the memory. Any application can use the MMAP () System Call (implementation) of Linux or the createfilemapping ()/mapviewoffile () request of windows for this ing. Memory ing is a convenient and efficient file I/O method, so it is used to load dynamic libraries. It is also possible to create an anonymous memory ing that does not correspond to any files. This method is used to store program
"] = NoneLogin ()ElsePrint ("Username or password is wrong, please login again")login_dict["Is_login"] = Nonelogin_dict["login_type"] = NoneLogin ()Def regi ():Login_name = input ("Please enter a username to register:")If login_name in User_list:Print ("The user name already exists, please re-enter the registered username")Regi ()ElseLOGIN_PASWD = input ("Please enter the mailbox password for%s"% (login_name))Login_number = input ("Please enter the phone number of%s"% (login_name))Login_email =
Relationship between applications and system commands
File Location
System Command: generally in the/bin and/sbin directories, or for Shell internal commands
Applications: usually in the/usr/bin and/usr/sbin Directories
Main Purpose
System Command: complete basic management of the system, such as IP configuration tools
Application: complete other independent auxiliary tasks, such as web browsers.
Applicable Environment
System Command: Generally, it is
Notes on the mysteries of Linux operating system (the first two chapters of BIOS and boot Management Program) chapter 1 Bios boot power -- Initial North Bridge -- load program into memory -- read South Bridge COMS data -- Build SMBIOS--POST North Bridge control CPU, memory South Bridge control all peripherals BIOS (Basic Input Output System) main functions: autom
1. OverviewThis chapter includes Boolean expressions, flow control methods, collection traversal, and flow jumps.2. Main content* As the content of the chapter is relatively basic, the daily use of a lot, so the basic content of some commonly used not to repeat. 2.1 Using Boolean expressionsFamiliar with the following comparison operators: Be familiar with the following logical expressions: , | |, ^.BOOL true ; BOOL false //False//true//false 2.2 Program
2014-06-21 Created by BaoxinjianI. Summary
When setting the concurrent program, we need to set the default value for parameter, and the implementation of the linkage of some parameter in Concurrent programs can also be realized by default value.1. Constand2. Segment3. Profile4. SQL Statement5. Current time and DateSecond, the parameter specific setting simple example
1. Constant2. Segment3. Profile4. SQL Statement(1). SELECT To_number (oe_
garbage value of each region, that is, the amount of space and time it takes to reclaim the region, and then maintains a priority queue, recovering one of the most valuable region per time, based on the allowable collection times.To avoid the garbage collection problems caused by the cross-referencing of each region, each region of G1 has a remembered Set that stores references to other region's objects in this region. When a memory is reclaimed, this part is also added when enumerating GC root
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