Introduction to C++ Data Types

Types of	Keyword
Boolean	bool
Integer	int
Single precision	float
Double precision	double
No return value type	void
Wide character	wchar_t

C++ sizeof to obtain the size of various data types

#include<limits>
  cout<<(numeric_limits<int>::max)() << '\t'<<(numeric_limits<int>::min)()<< endl;

For the understanding of C++, all the header files are introduced.
The limits header file has a numeric_limits method.
Custom data type
typedef declaration (can be understood as alias)

  typedef int hello;
  hello a=3;
  cout<<a<<endl;

Enumeration types are derived from C++

enum color{
    
    red,blue,green};
enum color {
    
    red,blue,yellow} abs;
abs=yellow;
cout<< abs <<endl;
输出-------------------
2
解释：输出第一个名称的值为 0，第二个名称的值为 1，第三个名称的值为 2
假如：blue=3，结果为4