An Introduction to Design Patterns in C++ with Qt 4 (Bruce by Alan Ezust, Paul Ezust

By Alan Ezust, Paul Ezust

Examine C++, styles, and Qt four Cross-Platform DevelopmentMaster C++ and layout styles jointly, utilizing the world's major open resource framework for cross-platform improvement: Qt four. An creation to layout styles in C++ with Qt four is an entire instructional and reference that assumes no earlier wisdom of C, C++, gadgets, or styles. you will stroll via each center thought, one step at a time, studying via an intensive selection of Qt 4.1-tested examples and workouts. by the point you are performed, you may be growing multithreaded GUI purposes that entry databases and manage XML files--applications that run on structures together with home windows, Linux, Unix, and Mac OS X. better of all, you may be writing code that is effective, reusable, and chic. study gadgets speedy: periods, inheritance, polymorphism, and extra grasp strong layout styles notice effective high-level programming suggestions utilizing libraries, generics, and bins construct graphical functions utilizing Qt widgets, types, and perspectives research complicated innovations starting from multithreading to reflective programming Use Qt's integrated periods for getting access to MySQL information incorporates a whole C++ language reference

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Basic concepts such as keywords, literals, identifiers, declarations, native types, and type conversions are defined. Some history and evolution are discussed, along with the relationship between C++ and the C language. 14 Overview of C++ . . . . . . . . . . . 6 A Brief History of C++ . . . . . . . . . 6 Setup: Open-Source Platforms. . . . . 7 Setup: Win32 . . . . . . . . . . . . 12 C++ First Example . . . . . . . . . . 12 Input and Output . . . .

3 S E T U P : O P E N - S O U R C E P L AT F O R M S 9 libqt4-qt3support - Qt 3 compatibility library for Qt 4 libqt4-sql - Qt 4 SQL database module qt4-designer - Qt 4 Designer qt4-dev-tools - Qt 4 development tools qt4-doc - Qt 4 API documentation libqt4-designer - Qt 4 Designer libraries [ROOT@lazarus]# As you can see, in Debian, Qt 4 has been split into many separate packages to give package maintainers more flexibility when they deploy. When developing, you need the full Qt 4 package with developers’ tools, full headers, docs, designer, assistant, and examples.

Int* y = &x ; In this example, y points to the integer x. The asterisk * following the int indicates that y is a pointer to int. Here we have initialized the int pointer y to the address of the int variable x. One of the powerful features of pointers is that, subject to rules that we will explore shortly, it is possible for a pointer of one type to hold the address of an object of a different (but related) type. Zero (0), often represented by the macro NULL in C programs, is a special value that can be legally assigned to a pointer, usually when it is being initialized (or re-initialized).

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