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 creation to layout styles in C++ with Qt four is an entire instructional and reference that assumes no earlier wisdom of C, C++, items, or styles. you will stroll via each center proposal, one step at a time, studying via an intensive number of Qt 4.1-tested examples and routines.

By the time you are performed, you can be developing multithreaded GUI purposes that entry databases and control XML files--applications that run on systems 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 gadgets speedy: sessions, inheritance, polymorphism, and more
  • Master strong layout styles
  • Discover effective high-level programming suggestions 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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13. Modify the program so that it will accept values from the user until the value 9999 is entered. 7. Identifiers, Types, and Literals Identifiers are names that are used in C++ programs for functions, parameters, variables, constants, classes, and types. An identifier consists of a sequence of letters, digits, and underscores that does not begin with a digit. An identifier cannot be a reserved keyword. See Appendix A for a list of them. The standard does not specify a limit to the length of an identifier, but certain implementations of C++ only examine the first 31 characters to distinguish between identifiers.

For its entire life, a reference variable will be an alias for the actual lvalue that initialized it. This association cannot be revoked or transferred. For example: int a = 10, b = 20; int& ra = a; ra = b; const int c = 45; const int & rc = c; rc = 10; // ra is an alias for a // this causes a to be assigned the value 20 // // // // c is a constant: its value is read-only. legal but probably not very useful. compiler error - const data may not be changed. The reader has surely noticed that the use of the ampersand in this section might be confused with its use in the earlier section on pointers.

Failure to do so can result in crippling memory leaks. org provide a variety of classes and functions to help manage and clean up heap memory. In addition to container classes, each library has one or more smart pointer class. A smart pointer is an object that stores and manages a pointer to a heap object. It behaves much like an ordinary pointer except that it automatically deletes the heap object at the appropriate time. Qt has QPointer, the Standard Library has std::auto_ptr, and Boost has a shared_ptr.

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