Download An Introduction to Design Patterns in C++ with Qt 4 by Alan Ezust PDF

By Alan Ezust

Learn C++, styles, and Qt four Cross-Platform Development

Master C++ and layout styles jointly, utilizing the world's best open resource framework for cross-platform improvement: Qt four.

An advent to layout styles in C++ with Qt four is a whole instructional and reference that assumes no past wisdom of C, C++, items, or styles. you are going to stroll via each middle idea, one step at a time, studying via an in depth selection of Qt 4.1-tested examples and workouts.

By the time you are performed, you will be developing multithreaded GUI purposes that entry databases and control 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.

  • Learn items speedy: periods, inheritance, polymorphism, and more
  • Master strong layout styles
  • Discover effective high-level programming recommendations utilizing libraries, generics, and containers
  • Build graphical purposes utilizing Qt widgets, versions, and views
  • Learn complex recommendations starting from multithreading to reflective programming
  • Use Qt's integrated sessions for getting access to MySQL data
  • Includes an entire C++ language reference

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Additional resources for An Introduction to Design Patterns in C++ with Qt 4

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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).

For example: const int x = 33; const int v[] = {3, 6, x, 2 * x}; Working with the declarations above: ++x ; v[2] = 44; // error // error Compilers can take advantage of an object being read-only in various ways. For integers and some simple types, no storage needs to be allocated for a const unless its address is taken. Therefore, most optimizing compilers try to store them in static memory. It is good programming style to use const entities instead of embedding constant expressions (sometimes called "magic numbers") in your code.

A pointer that stores the value 0 is called a null pointer. Stroustrup recommends the use of 0 rather than the macro NULL in C++ programs. A pointer to a simple type uses exactly the same amount of memory as a pointer to a large complicated object. That size is usually the same as sizeof(int) on that machine. Theunary* operator, also known as the dereference operator, when applied to a nonnull pointer returns the object at the address stored by the pointer. The symbol * is used in two different ways in connection with pointers: It can serve as a type modifier in a pointer variable definition.

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