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Iostream

Explore how C++ handles input and output through the iostream library. Learn to use std::istream and std::ostream with common stream objects like std::cin and std::cout, and understand the role of stream operators and manipulators for efficient data processing.

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The stream classes std::istream and std::ostream are often used for the reading and writing of data. Use of std::istream classes requires the <istream> header; use of std::ostream classes requires the <ostream> header. You can have both with the header <iostream>. std::istream is a typedef for the class basic_istream and the character type char, std::ostream for the class basic_ostream respectively:

C++
typedef basic_istream<char> istream;
typedef basic_ostream<char> ostream;

C++ has four predefined stream objects for ...