19.3 STANDARD TEMPLATE LIBRARY (STL)
Natural extension of Object Orientation and Templates is Standard Template Library. All programming environments provide their users with a standard template library. It contains implementations of many useful classes and functions that are based on templates.
The idea is that a programmer can use these classes and functions directly in his/her programs. It increases his/her productivity. It is possible for any programmer to write any code. But testing and debugging takes a lot of time. Hence, code that is previously tested is a good tool in the hands of an experienced programmer.
The STL is based on three main components containers, iterators, and algorithms.
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