variable
Definition of a variable: type variable name = value;
int a =0; // 变量,可以在赋值
constant
Defining a constant name = const constant type constant value
const int LENTHER = 521 // 定义一个常量
Definition of a variable: type variable name = value;
int a =0; // 变量,可以在赋值
Defining a constant name = const constant type constant value
const int LENTHER = 521 // 定义一个常量