C + + Primer Plus (CHAPTER3)

The first few chapters are relatively simple, so just record the uniqueness.

C + + adds the way {} initializes the variable, omitting the = sign so that all types can be initialized in the same way, and that initialization does not allow narrowing
The cout and cin,wchar_t with respect to char have wcout and wcin.

The character constants of the wchar_t are prefixed with l, and their length and symbol characteristics are determined by the implementation.

c++11 new char16_t (prefix u = character constant) and char32_t (with u).

COUT.SETF (ios_base::fixed// forcing the output to use fixed-point notation (6 digits after the decimal point), the function is currently not known, first remember again. 

Floating-point numbers can degrade precision when they are calculated.

To force type conversions:

    (typename) value;    TypeName (value);    Static_case<typename> value;

C + + Primer Plus (CHAPTER3)