Knowledge point 6: enumerated variables

Enum variable

enum Weekend{
    
    sat, sun};

Press the enumeration element at compile time constantProcessing, each enumeration element is an integer and the default is 0,1,2,3,... ,
you can also manually specify the value of the enumeration element :

enum Weekend{
    
    sat = 6, sun};//人为赋值 之后 自动按顺序+1

But be aware that you can no longer assign values ​​to enumeration elements latersat = 1 -wrong!

Enumeration elements can be directly referenced:

enum Weekend day = sat;//相当于day=0
printf("%d", sun);

When assigning a value to an enumeration variable, you cannot directly assign an integer, because the two are not of the same type, you can assign a value after type conversion, such as:

day = (enum Weekend) 6;//与day = sat;效果相同