space, tabs (horizontal and vertical), carriage return, line feed, form feed.
println is not a C++ keyword.
== 'White spaces' in C++ are generally not important. The C Preprocessor takes out all un-needed whitespace and extra newlines before the program is compiled. However, make sure that you put white space in between certain things, such as variable declerations. "inta;" will not create an integer variable called a; it will create an error. == Space, tabulator, line-feed, carriage-return, form-feed, vertical-tabulator.
letters, digits, special characters and white spaces
If you mean the original name of C++, it was originally called "C with Classes". However, after the introduction of template metaprogramming, it was renamed C++ which meant "the successor to C".
'int' is one of the built-in data-types, it is meant to hold integer values.
Bad spelling for 'white-space', I suppose. ^ I figured he meant switch-case.
b+b+b+c+c+c+c =3b+4c
c + c + 2c + c + c = 6c
b + b + b + c + c + c + c = 3b + 4c
There is no such thing. You probably meant the main function. The main function is the only function that is required as it serves as the entry point of the program.
4c
c + c + c + c + c = 5 * c.