After 1 whole year of C, now we're going to learn about C++

C++ is a programming language developed from C.

• Library <iostream>
  This library provide input output functions.

  • cin - standard input
  • cout - standard output

  Trivia: what is the difference between cin with scanf and cout with printf?
  Hint: Take a glance at the implementation.

• namespace
  In C, we usually use the prefix on identifier to avoid name conflicts. The namespace can be likened to a container that is used to group functions (or other data) so that they can be distinguished.

• class
  Familiar with struct ? class is also a User Defined Data Type. The only difference is the default of the access modifier. In struct the default* is public, while in class the default is private (will be studied further in the Object Oriented Programming course, don't get confused first).

• template To create a function or class that can adapt and work with different data types, use template.

• and many more...

Note: all libraries that apply in C also apply in C ++, but not the other way around.

What does using namespace std; mean in the implementation example? ** standard library ** in C ++ uses ** prefix ** std:: so that it can be used. So, to avoid writing the prefix over and over again, add these lines to the program.