classEnclosing{ private: intx; /* start of Nested class declaration */ classNested{ inty; voidNestedFun(Enclosing *e){ cout<<e->x;// works fine: nested class can access // private members of Enclosing class } };// declaration Nested class ends here };// declaration Enclosing class end...
下面是一个小程序,可用于测试这个新的类: // nested.cpp -- using a queue that has a nested class #include "queuetp.h" #include <iostream> #include <string> int main() { QueueTP<std::string> cs(5); std::string temp; while (!cs.isfull()) { std::cout << "Please enter your na...
A class, struct or union that is declared within another class. For example the struct PairT in the following code is a nested class: template<class T> class MyTemplateClass { public: struct PairT { T first, second; }; }; Import path import cpp ...
intx,y;// globalsclassenclose{// enclosing classintx;// note: private membersstaticints;public:structinner{// nested classvoidf(inti){x=i;// Error: can't write to non-static enclose::x without instanceinta=sizeof x;// Error until C++11,// OK in C++11: operand of sizeof is uneva...
// member_functions_in_nested_classes.cppclassBufferedIO{public:enumIOError { None, Access, General };classBufferedInput{public:intread();// Declare but do not define memberintgood();// functions read and good.private: IOError _inputerror; };classBufferedOutput{// Member list.}; };// De...
cpp class OuterClass { public: class InnerClass : public QObject { Q_OBJECT public: void someFunction() { emit someSignal(); } signals: void someSignal(); }; }; 这里InnerClass是一个嵌套类,并且试图使用MetaObject系统的信号功能。这是不被支持的,因此会导致编译错误。 4. 修改代码结构或逻辑...
class nested_exception; (C++11 起) std::nested_exception 是一个多态混入类,可以捕获并存储当前异常,令任意类型的异常彼此间内嵌可行。 成员函数(构造函数) 构造nested_exception (公开成员函数) (析构函数) [虚] 析构nested exception (虚公开成员函数) operator= 替换nested_exception 的内容 (公开成...
// nested_class_template1.cpp // compile with: /EHsc #include <iostream> using namespace std; class X { template <class T> struct Y { T m_t; Y(T t): m_t(t) { } }; Y<int> yInt; Y<char> yChar; public: X(int i, char c) : yInt(i), yChar(c) { } ...
// nested_class_template1.cpp // compile with: /EHsc #include <iostream> using namespace std; class X { template <class T> struct Y { T m_t; Y(T t): m_t(t) { } }; Y<int> yInt; Y<char> yChar; public: X(int i, char c) : yInt(i), yChar(c) { } ...
classnested_exception{public: nested_exception(); nested_exception(constnested_exception&) =default;virtual~nested_exception() =default;// access functions}; Member Operatoren NameBeschreibung operator=Zuweisungsoperator. Funktionen NameBeschreibung ...