基本概念 静态成员变量(Static data members) 静态成员函数(Static member functions) 只可以使用静态成员的场景 代码示例 总结 基本概念 引例:银行账户类中需要一个数据成员来表示利率,利率变动时,所有的对象都用新的利率,利率是和类相关联而不和每个对对象关联,此时利率便适合作为静态成员。 classAccount{public:sta...
because it is private. Normally we access private members through public member functions. While we could create a normal public member function to access s_nValue, we'd then need to instantiate an object of the class type to use the function!
A static member function is a special member function, which is used to access only static data members, any other normal data member cannot be accessed through static member function. Just like static data member, static member function is also a class function; it is not associated with any...
A static member function cannot access the non static members of the class or base class class X{ public: int b; static int a; enum mode{a1,a2,a3}; static int inc() { return b;//this will give an error } X(){}; }; Static data members of class have extern linkage, they can...
A static member function can access only the names of static members, enumerators, and nested types of the class in which it is declared. Suppose a static member functionf()is a member of classX. The static member functionf()cannot access the nonstatic membersXor the nonstatic members of ...
static members1 一个类的static member也称为"class variable", 这是因为它是该类所有对象中共享的,即它的值不会因所属该类对象的不同而发生改变。 它可以用于统计目前该类实例化了多少对象: // static members in classes #include <iostream> using namespace std; ...
如果没有任何一个members被直接存取,事实上就不需要this指针,因此也就没有必要通过一个class object来调用一个member function。不过C++语言到当前为止并不能识别这种情况。 因为上述问题,会导致存取static data members引入一些不规则性。同样在深度探索C++对象模型 针对该不规则性有如下描述 如果class的设计者把static ...
Generally, static data members are used to maintain the common things related to the class, like counting the objects etc.Static Member FunctionA static member function is used to access or manipulate the static data member, other data member cannot be used with a static member function....
I would recommend redesigning the class so that the function can be made non-static.I understand & appreciate the point being made about static & instance members of classes, & it has helped me too because I've just had the same issue.I...
Static members are often used to manage shared resources or counters that should be shared across all instances of a class. Static members can be used to store global configuration settings or constants, useful for managing a pool of resources (e.g., a cache, database connection pool, etc....