Download e-book for kindle: An Introduction to Design Patterns in C++ with Qt 4 by Alan Ezust

By Alan Ezust

ISBN-10: 0131879057

ISBN-13: 9780131879058

Study 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 4.An advent to layout styles in C++ with Qt four is a whole instructional and reference that assumes no earlier wisdom of C, C++, gadgets, or styles. you will stroll via each middle inspiration, one step at a time, studying via an in depth choice of Qt 4.1-tested examples and exercises.By the time you are performed, you can be growing multithreaded GUI purposes that entry databases and control XML documents - functions 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 elegant.Learn gadgets quickly: sessions, inheritance, polymorphism, and moreMaster robust layout patternsDiscover effective high-level programming concepts utilizing libraries, generics, and containersBuild graphical functions utilizing Qt widgets, types, and viewsLearn complex innovations starting from multithreading to reflective programmingUse Qt's integrated sessions for gaining access to MySQL dataIncludes a whole C++ language reference

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Iteration We used two of the three iteration structures provided by C++ in our example. 3. 6. 3, the directive #include allowed us to make use of the predefined global input and output stream objects. They are 1. cin standard input, the keyboard by default 2. cout standard output, the console screen by default 3. 3, we made use of the global stream object (of the class ostream), called cout. We called one of its member functions, whose name is operator<<(). [9] The syntax for that output statement is also quite interesting.

Cpp [ . . str(); cout << strval; /* An output file stream. close(); <-- 1 <-- 2 (1)convert the stringstream to a string (2)creates (or overwrites) a disk file for output After the strings have been written, we have a couple of choices for how to read them. 17. 17. cpp [ . . = lucky2) cerr << "ERROR! = pi) cerr << "ERROR! 18. 18. cpp [ . . 16 so that it does the following: • It gets the file name from the user as an STL string fileName. c_str() to convert the string to a form that is acceptable to the open( ) function.

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. The unary * operator, also known as the dereference operator, when applied to a non-null 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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An Introduction to Design Patterns in C++ with Qt 4 by Alan Ezust

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