What are smart pointers? The answer is fairly simple; a smart pointer is a pointer which is smart. What does that mean? Actually, smart pointers are objects which behave like pointers but do more than a pointer. These objects are flexible as pointers and have the advantage of being an object (like constructor and destructors called automatically). A smart pointer is designed to handle the problems caused by using normal pointers (hence called smart).
In C++ programing language, all header files end with .H extension. In standard C++, all devices are accessed and used as a file. One such header file is iostream.h in C++ programming language. In this, all input and output devices are treated as files. Let's quickly look at what are the input and output devices mean in C++ program. Standard Input Device - Keyboard Standard Output Device - Monitor Standard Error Device - Screen or monitor In C++, input and output are not defined within, and are implemented with the help of a component of the C++ standard library which is I/O library. A file is read simply as a stream of bytes at the lowest level. But at a user level, a file consists of possibly mixed data types which can be characters, arithmetic values class, objects etc. What are the predefined streams in I/O Library? As discussed above there are input, output and error library in c++, they have some predefined streams objects as well w...