Type of 'this' pointer is "Class pointer" (or "Objet pointer") type - if there is a class named "Example" then, the type of 'this' pointer will be "Example*".Its type may depends on member function declaration in which the 'this' pointer is used. If the member function is ...
在C++ 中,this指针是一个特殊的指针,它指向当前对象的实例。 在C++ 中,每一个对象都能通过this指针来访问自己的地址。 this是一个隐藏的指针,可以在类的成员函数中使用,它可以用来指向调用对象。 当一个对象的成员函数被调用时,编译器会隐式地传递该对象的地址作为 this 指针。 友元函数没有this指针,因为友元不...
Thethispointercanonlybecalledinamemberfunctionofa classthatrepresentstheaddressofthecurrentobject.Here's anexample: VoidDate::setMonth(int,Mn) { Month=Mn;//thethreesentencesareequivalent This->month=mn; (*this).Month=mn; } 1.thiscanonlybeusedinmemberfunctions. Globalfunctions,staticfunctionscannot...
As you would expect, this program produces the result: 2 Somehow, when we callsimple.setID(2);, C++ knows that functionsetID()should operate on objectsimple, and thatm_idactually refers tosimple.m_id. The answer is that C++ utilizes a hidden pointer namedthis! In this lesson, we’ll...
Static member functions, because they exist at the class level and not as part of an object, don't have athispointer. It's an error to refer tothisin a static method. In this example, the parametersname, andaliashide fields with the same names. Thethiskeyword qualifies those variables ...
Unit04-Section08-The Scope of Variables & this Pointer
实际上,vbptr 指的是虚基类表指针(virtual base table pointer),该指针指向了一个虚基类表(virtual table),虚表中记录了虚基类与本类的偏移地址;通过偏移地址,这样就找到了虚基类成员,而虚继承也不用像普通多继承那样维持着公共基类(虚基类)的两份同样的拷贝,节省了存储空间。
error C2662, cannot convert ‘this’ pointer from ‘const class ’ to ‘class &’ 看一下导致这个编译错误的例子: class COwnInt { public: int get(); private: int m_n; }; int COwnInt::get() { return m_n; } int main() {
实际上,vbptr 指的是虚基类表指针(virtual base table pointer),该指针指向了一个虚基类表(virtual table),虚表中记录了虚基类与本类的偏移地址;通过偏移地址,这样就找到了虚基类成员,而虚继承也不用像普通多继承那样维持着公共基类(虚基类)的两份同样的拷贝,节省了存储空间。
这个错误在于一点:常量对象只能调用常量成员(函数\变量),不能调用非常量成员。另一方面,非常量对象,既可以调用常量成员,又可以调用非常量成员。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 classA { public: voidfun_1() { std::cout <<"非常量函数"<< std::endl; ...