examples of computer programs

We know that there are two types of BIOS passwords: User Password and system password. The former is used only when BIOS is set, and the latter is required before self-check. The following describes how to clear the user password. Because the system password is cleared, only two methods are available now .. first, of course, it is discharged. Second, it is to find the default password of the manufacturer .... (I will also mention it below ). 1. The most common and simplest method-Debug MethodI

previous introduction is the flow, in addition to the flow, there are other ways of operation, such as random access and memory-mapped files, why do you need these methods? What are their characteristics? For what occasion? Let's move on to the next exploration.----------------To be continued, check out the latest articles, please pay attention to the public number "old Horse Programming" (Scan the QR code below), from the introduction to advanced, in layman's words, Lao Ma and you explore the

together, may write less code, but if the use of improper, will make the understanding much more difficult.Operator PrecedenceA slightly more complex operation may involve multiple variables, and a number of operations, which is the first, which is the calculation? The programming language dictates the precedence of the different operators, some will be counted first, some will be counted later, and in most cases, this priority is consistent with our common sense understanding.But in some compl

Thinking logic of computer programs (66) and thinking 66 We mentioned two problems of multi-thread shared memory in the previous section. One is the race condition and the other is the memory visibility. we mentioned that one solution to these two problems is to use the synchronized keyword, this topic describes this keyword. Usage Synchronized can be used to modify the instance method, static method, and c

Many friends may think that after the Win7 32-bit system is turned on, only we open the program is the start of the program, in fact, you may wish to try to open the computer's Task Manager window, in the process of this column is not to see a lot of content, actually these are currently starting in the program, that is to say, Many programs are open when we open the computer, then in many

Thinking logic of computer programs (1), thinking LogicWhat is the program? A computer is a machine that consists of CPU, memory, hard disk, and input/output devices. Operating systems run on the computer, such as Windows or Linux, and various applications, such as Word and QQ, run on the operating system. The operatin

URL, an organization code card, and so on. Bundle Identifier: The program identifier, which is a flag that differs from other programs, is composed of Organization Identifier + Product Name. Language: The programming language used in the project, choose c speech here. 4) Click "Next", save the file can enter the future project, as shown:650) this.width=650; "src=" http://c.biancheng.net/cpp/uploads/allimg/160308/1-16030Q45F4V8.jpg "style

1, directly click the "Start" menu, and then select the "Run" option, this time will pop up a dialog box, in which directly enter the "regedit" Word command, and then click Enter; 2. After the Registry Editor opens, locate the following HKEY_CURRENT_USER, Software, Microsoft, Windows, CurrentVersion, Policies, explorer options on the left, Then delete the subkey "Disallowcpl" below the option on the right; 3, resource management Reset, the "taskkill/f/im Explorer.exe Start Explorer.exe" c

Cuan ";Charap[]="Cuan Cuan Cuan Cuan Cuan Cuan";Charaq[]="Cuan Cuan Cuan Cuan Cuan Cuan";Charar[]="Cuan Cuan Cuan Cuan Cuan Cuan";Char as[]="Cuan Cuan Cuan Cuan Cuan Cuan";Charat[]="Please press any key to start the card machine ";Charau[]=" ";Charav[]="

Thinking logic of computer programs (36) and thinking 36 In the previous section, we introduced the basic concepts and principles of generics. In this section, we will continue to discuss generics and the wildcard concepts in generics. Wildcards have confusing and confusing syntaxes, but they are widely used in Java container classes. What is it? In this section, let's analyze it gradually. More concise par

Thinking logic of computer programs (68) and thinking 68 This section continues with the content of the previous section and discusses how to use wait/notify to implement more collaboration scenarios. Start at the same time At the same time, it is similar to an athlete's competition. When we hear the game start with a gun, we start at the same time. Below, we simulate this process. Here there is a main thre

Efficient Desktop Connection: [automatically restore folders and programs before the computer is closed] For many friends, daily boot work is only a continuation of the previous day, so the first thing every day is to restore the computer to the state when it was shut down the previous day. Is there any good way?Day-to-day manual recovery can be said to be time-

Part 8: bios and CMOS FAQs When it comes to bios, most cainiao don't know much about it and dare not try it easily, as if they are naturally afraid of the blue screen, even many old birds cannot distinguish BIOS settings from CMOS settings. Therefore, before writing a Q A question, I think it is necessary to clarify these two concepts to get twice the result with half the effort.BIOS is short for Basic Input/Output System. It is originally intended to be "Basic Input/Output System ". What we u

Thinking logic of computer programs (64) and thinking 64 For file processing, we introduced the stream method, section 57 introduced the byte stream, section 58 introduced the ghost stream, and also introduced the underlying file operation method, section 60 describes random read/write files, Section 61 Describes memory ing files, Object serialization/deserialization mechanisms, and section 62 describes Jav

Thinking logic of computer programs (73) and thinking 73 In this section and the following sections, we will discuss the container classes in Java and package. This section describes two simple classes, CopyOnWriteArrayList and CopyOnWriteArraySet, and discusses their usage and implementation principles. Their usage is relatively simple. What we need to understand is their implementation mechanism: Copy-On-

Thinking logic of computer programs (13), thinking Logic Class In the previous section, we introduced the basic principles of function calling. In this section and the next sections, we will explore the world of classes. Programs mainly involve data and operations on data. To facilitate understanding and operation, advanced languages use the data type concept. Di

then sleeps for a while, then sets shutdown to true and finally outputs "exit main".The expected result is that all two threads exit, but actually executes, it is likely to be found that Hellothread never exits, that is, in the Hellothread execution flow, shutdown is always false, even if the main thread has changed to true.What's going on here? This is the memory visibility issue. In a computer system, in addition to memory, the data is also cached

file.Continuous read-only code snippets and read-write data segments, which makes it easy for the loader to page and initialize contiguous areas.At load time, the read-only code snippet and the writable data segment corresponding to the page table are initialized to a page that is not cached (involving the operating system and the principle of composition), pointing to somewhere in the destination file on disk. So, during the program loading process, there is no real load of code and data from

Looking for prime factorsRequires the Smallest-divisor process in the book to find the minimum factor of 199, 1999, 19999.Scheme Code:Main process:Define the process of finding prime numbers 4 , greater than the test value, then it must be a prime number can and 2 Divisible, then not prime, the minimum factor is 2 If not, go back to the process Find-div, and then try to divide it with 2+1, loop #lang Racket (define (square x) (* x x)); Definition filter (define (smallest-div

"); This.filelock = This.randomAccessFile.getChannel (). Trylock (); if (This.fileLock.isValid ()) {return true; } else {return false; }} else {return false; }}/** * Unlock and deleteFILE * * @return * @throws IOException */public Boolean unLock () throws IOException {if (!this. File.exists ()) {return true; } else {if (this.filelock! = null) {this.fileLock.release (); } if (this.randomaccessfile! = null) {this.randomAccessFile