Enumeration class in C++

Enumeration class definition
format

enum class 枚举类型名：底层类型{
    
    枚举值列表};

The default underlying type is int, but the underlying type can be customized in the new C++ standard.
Such as:

enum class Type {
    
    General,Light,Medium,Heavy};   //底层类型默认是int型
enum class Type: char{
    
    General,Light,Medium,Heavy};   
enum class Category{
    
    General=1,Pistol,MachineGun,Cannon};

Advantages of enumeration class
1. Strong scope: its scope is restricted to enumeration class, such as: use the enumeration value of Type General: Type::General
2. Conversion restriction: enumeration class object cannot be implicitly related to plastic Mutual conversion.
3. You can specify the underlying type, for example:

enum class Type:char{
    
    General,Light,Medium,Heavy};

For example

#include <iostream>
 
using namespace std;
enum class Side{
    
    Right,Left};
enum class Thing{
    
    Wrong,Right};   //有相同的Right，但是不冲突，而两个不同的枚举类型有相同的枚举元素则会起冲突
 
int main()
{
    
    
	Side s = Side::Right;
	Thing w = Thing::Wrong;
	cout << (s == w) << endl;   //编译错误，无法直接比较不同的枚举类
	system("pause");
	return 0;
}