c programming 2nd edition

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JavaScript and DOM, we can completely collect that information and insert it into the document using the SUP element.List of shortcut keysThe AccessKey property can associate an element (such as a link) with a specific key on the keyboard. This is useful for people who can't or don't like using a mouse to browse the Web.In general, in browsers for Windows systems, the use of shortcut keys is to press the ALT key and specific keys at the same time on the keyboard, and in browsers for Mac systems

never be able to leave the current link.What about those people who use keyboards only?Fortunately, the OnClick event handler is smarter than we thought. Although its name "onclick" gives the impression that it is only associated with a mouse click action, it is not true: in almost all browsers, the action of tabbing to a link and pressing ENTER will also trigger the OnClick event.It is best not to use the OnKeyPress event handler function. The OnClick event handler function has been able to me

software development clearly and intuitively, clarify the specific tasks that need to be completed in each stage, and play a guiding and normative role in the development process. Software Development Methodology Programming style documentation; Have a clear name for the identifier; appropriate procedural notes; The procedural writing style of Liang-ha; The form of indentation; A clear statement s

effects;the value of the macro:Functions (such as GETCHAR) are defined as macros to avoid the overhead of calling functions, and #undef names can be used to cancel macro definitions; The formal parameter in the name cannot be replaced with a quoted string and, if necessary, precede the parameter with # in the replacement text;preprocessing operator # #: If the replacement text in the shape participates in it adjacent, then the parameter is replaced by the actual parameter # #及其前后空白符会被删除, the re

combined; no parentheses: int　　*comp (void *, void *) indicates that comp is a function that returns an int type pointer; 5.12 Complex declaration The C language often receives criticism because of the syntax of declarations (especially function pointers); C's syntax tries to make the declaration and use consistent; Because C's declaration cannot be read from left to right and uses too many parentheses, it is confusing when the situation is more complex, such as 5.11 cases; complex declarations

Doe // Script Error　(2) All variables that do not have a direct assignment defined are automatically declared as having global scopefunction dosomething () { var Name= "Zhang San"; NewName= "John Doe"; // Zhang San // John Doe // Script ErrorThe variable blogname has a global scope, and AuthorName cannot be accessed outside the function.(3) All Window object properties have global scopeIn general, the built-in properties of the Window object have global scope, such as Window.name, Win

variable, (I understand) if the external variable definition appears after the function or in other source files, you need to use extern (preceded by int, etc.) declaration;The extern declarations of variables and functions are usually placed in a separate header file and include at the beginning of each source file;A declaration such as copy () is considered an old-fashioned declaration, and the parameter table will not be checked; ANSI c specifies that an empty parameter table must be declare

2-5 Loops and Numbersa) i = 0While I Print Ii + = 1b) for I in Range (0,11):Print I2-6 conditionalsN =int (raw_input (' Enter a number: '))If n print ' negative 'Elif n > 0:print ' positive 'Elseprint ' zero '2-7 Loops and stringss = Raw_input (' Enter a string: ')For Each_char in S:Print Each_charOrFor I in range (len (s)):Print I,s[i]Ori = 0Slen = Len (s)While I Print I,s[i]I +=1OrFor I,x in enumerate (s):Print I,x2-8 Loops and operatorsSubtot = 0For I in range (5):Subtot + = Int (raw_input ('

to the height of the right sub-tree. The key values can be traversed from small to large using the middle order traversal (with iterators).Refer to Cplusplus for a more detailed description of the set container.The specific code is as follows:1#include 2#include Set>3 using namespacestd;4 5 intMain ()6 {7 intMyints[] = { $, at, the, the, - };8 Setint> MySet (myints, myints +5);//Use the ' Set ' member function ' Insert ' is also OK.9 Ten Setint>::iterator ITR =Myset.begin (); One

syntax does not allow a variable name to contain spaces or punctuation (the dollar sign "$" exception)JavaScript variable names are allowed to contain letters, numbers, dollar signs, and underscores (but the first character is not allowed to be a number)Hump format naming:Remove Middle white space (underline), followed by each new word start with uppercase letters Script > var ="happy"; Script >Usually the hump format is the preferred format for function name, method name, and object prope

parameter. Call to function The basic format of the function call statement is: The The parameters in the Example: 1 intdataarray[ -];2 intN;3 DoubleAve;4 5 //Custom Functions6 DoubleAverageintValue[],intnum) {7 intI, sum =0;8 for(i =0; i ){9Sum + =Value[i];Ten returnsum*1.0/num; One } A } - - //function Call theAve = Average (DataArray, n);Application examples of custom functions Output multiplication Ta

].birthday.month, S[i].birthday.day, - s[i].department, s[i].major); WuPutchar ('\ n'); - } About } $ - voidSearchInfo (Studentinfo s[], date date) - { - inti; A for(i =0; i ){ + if(s[i].birthday.month>date.month) { theprintf"\n%4d%16s%2d/%2d", S[i].num,s[i].name, S[i].birthday.month, - s[i].birthday.day); $ Continue; the } the if(S[i].birthday.month = = Date.month s[i].birthday.day>date.day) { theprintf"\n%4d%16s%2d/%2d", S[i].num, S[i].name, S

page content asynchronously.With Ajax, you can only update a small part of the page. Other content-logo, navigation, head, foot, no reload.The main advantage of Ajax is that requests to the page are sent asynchronously to the server. The server does not respond to the request with the entire page, it processes the request in the background, while the user continues to browse the page and interact with the page. Your script can load and create page content on demand without interrupting the user

JavaScript code must be executed through the html/xhtml document, and the first way is to put the JS code between the to put the , allowing the browser to load the page fasterPS: Browser page load order: Please read this articleJS Note: 1,///2,/* 3, JS can be used JS allows programmers to directly assign values to variables without prior declaration, the most efficient declaration and assignment practices: var mood= "Happy", age=33;JS is a weakly typed language, meaning that programmers can cha

() { if(document.getElementById) { statements using getElementById }} Although it is a simple if statement, it ensures that the "old" browsers do not cause problems with my scripting code, so that the script has good backwards compatibility.Browser sniffing technology: addresses backward compatibility issues by extracting information from a browser vendor.Performance considerations: Determining the optimal performance of script execution1. Minimize access to the DOM and minimize markup2. M

The Style property is an object and can only return inline styles.When you need to reference a CSS property with a minus sign in the middle, the DOM asks for the hump naming method, that is, the CSS property font-family becomes the DOM attribute fontFamliy:element.style.fontFamilyRegardless of the number of hyphens in the CSS style attribute's name, the DOM is all represented by the Hump naming method, which is the CSS property backg-color corresponding to the DOM attribute backgroundcolor.CSS3

content "Hello world" is created.InsertBefore: Insert a new element in front of an existing element, when calling this method, you must know three things: 1, new element: The element you want to insert (newelement) 2, Target element: Before which element (targetelement) you want to insert this new element 3, parent element: The parent element of the target element (parentelement) Syntax: Patentelement.insertbefore (newelement,targetelement) We don't have to figure out what the parent element is

to the value of the attribute node. After making changes to the document through SetAttribute, you will still see the value of the property before the change through the browser's view source option to view the document's source code, that is, the changes made by setattribute are not reflected in the source code of the document itself. This "duplicity" phenomenon stems from the DOM's working mode: loading the static content of the document, and then dynamically refreshing, dynamic refresh does