The Standard Libraries in C++

Every implementation of C++ includes the standard libraries, and most include additional libraries as well. Libraries are sets of functions that can be linked into your code. You've already used a number of standard library functions and classes, most notably from the iostreams library.
To use a library, you typically include a header file in your source code, much as you did by writing #include <iostream.h> in many of the examples in this book. The angle brackets around the filename are a signal to the compiler to look in the directory where you keep the header files for your compiler's standard libraries.

The most commonly used libraries include
  • String 
  • Stdlib library 
  • Time and Date library
Among them String has the following functions
    Stdlib library is having the following functions
      Functions in Time and date library
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