Define a struct inside a class in C++

Question

Can someone give me an example about how to define a new type of struct in a class in C++.

Thanks.

Answer 1

Something like this:

class Class {     // visibility will default to private unless you specify it     struct Struct {         //specify members here;     }; }; 

Answer 2

declare class & nested struct probably in some header file

class C {     // struct will be private without `public:` keyword     struct S {         // members will be public without `private:` keyword         int sa;         void func();     };     void func(S s); }; 

if you want to separate the implementation/definition, maybe in some CPP file

void C::func(S s) {     // implementation here } void C::S::func() { // <= note that you need the `full path` to the function     // implementation here } 

if you want to inline the implementation, other answers will do fine.