bool operator == ( const enum_type& cs ) { / if ( m_val == m_val ) return true; / else return false; } / operator enum_type() { return m_val; }; 这样,上文的两个状态枚举类可以简化成下面的两个样子: class ComputerState { public: enum
//operators bool operator <(const Color & other) { return value < other.value; } bool operator >(const Color & other) { return value > other.value; } bool operator <=(const Color & other) { return value <= other.value; } bool operator >=(const Color & other) { return value >=...
ErrorCode code; std::cin >> code; // error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'ErrorCode') 可以通过(int &) 给code赋值[3]: ErrorCode code; std::cin >> (int &)code; // ok cout 输出序号值: ErrorCode a = ...
bool operator ==(const Color & other) { return value == other.value; } //... //conversion int toint() { return value; } }; //init static const Color obj const Color Color::red(Color::_color::_red); const Color Color::blue(Color::_color::_blue); const Color Color::yellow(...
关于在 enum class 中覆盖 operator++,这是不直接支持的,因为 enum class 的设计初衷是为了提供一种更严格的枚举类型,而不是为了支持算术运算。 基础概念 Enum Class: C++11 引入的一种枚举类型,它具有强类型性,枚举值不会隐式转换为整数,且枚举值的作用域被限制在枚举类型内部。 Operator Overloading: 允许...
2.2.5 union中不是所有类都可以作为其成员变量,如果一个类(包括其父类)中还有自定义的constructor、copyconstructor、destructor、virtual functional或copy assignment operator(拷贝赋值运算符)任意一个,则不能2.2.6 union匿名联合:定义union的时候不定以名字,仅仅通知编译...
public const int c = 2; private int id = -1; public static implicit operator int (C c) { return c.id; } public static implicit operator C (int i) { return new C(i); } public static bool operator == (C c, int i) { return (int)c == i; } public static bool operator !
enumDay{mon,tue,wed,thu,fri,sat,sun};Day&operator++(Day&d){returnd=(d==Day::sun)?Day::mon:static_cast<Day>(static_cast<int>(d)+1);}Day today=Day::sat;Day tomorrow=++today; The use of a static_cast is not pretty, but ...
= Zhongshan; ++oneCity){ cout<<oneCity<<endl;}以上的++OneCity是没有定义的，在Visual C++ 6 编译下得到如下错误：error C2675: unary '++' : 'enum main::SomeCities' does not define this operator or a conversion to a type acceptable to the predefined operator8、Sizeof 一...
Đọc bằng tiếng Anh Lưu Chia sẻ qua Facebookx.comLinkedInEmail VerificationConditionalOperator Enum Reference Definition Namespace: System.Web.UI Assembly: System.Web.dll Specifies operators for a conditional expression used in aVerificationAttributeclass. ...