By Greg Reese

C++ usual Library sensible advice teaches starting and skilled programmers tips on how to use the traditional Library and its significant part the normal Template Library (STL) successfully in regimen programming chores. The publication offers a hundred fast, easy-to-use tips and recommendations to universal programming difficulties corresponding to utilizing the precise box, getting a C-style array from a vector, initializing a map with particular values, and computing the suggest, median, and mode. The suggestions are grouped through issues together with, lists, deques, vectors, textual content processing, numerical algorithms, numerical processing, and boxes so programmers can fast search for an answer after they come across an issue. to illustrate using the information in useful program, the ebook concludes with a capstone undertaking approximately electronic picture processing and, specifically, picture enhancement. This software indicates the facility of the normal Library because it graphically illustrates how quite a few strains of normal Library code can produce significant alterations within the visual appeal of a picture.

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Extra info for C++ Standard Library Practical Tips (Programming Series)

Sample text

To iterate” means to do something repeatedly. In the STL, an iterator is an object that can move from one element in a sequence to another and another. Iterators are important for traversing a sequence and serving as bridges between containers (data structures that hold objects) and the STL algorithms (functions that operate on sequences). Having the algorithms operate only on iterators rather than the containers themselves enables the algorithms to be independent of the details of traversing any particular container’s elements.

Anytime the declared name appears after the using-declaration and in its scope, the compiler assumes the name is in the specified namespace. = 0 ) display_error( result ); } 24 C++ Standard Library Practical Tips compiles fine even though it does not explicitly specify the namespace G5 in the call of display_error. You have to be careful doing this because if there were another function with the same name and signature, the compiler wouldn’t be able to distinguish the two and you’d be back to the original name-collision problem.

It makes a Port instance, does some processing (perhaps waiting a set amount of time to ensure that the port is active) and tests the port to see if it’s ready. If it’s not, the function throws an exception. In this case, the data type of the exception is a C++ text string. The thrown exception starts a process called stack unwinding. First, C++ calls all the destructors of class instances that are in the same scope as the throw statement. Then, until the exception is handled (as described shortly), C++ calls all the The C++ Standard Library 15 destructors in the surrounding scope, then in the scope surrounding that, and so on.

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