```c++
#include
class Child {
public:
Child() = default;
Child(int age, std::string name) : age(age), name(name) {}
int age;
std::string name;
};
```
Child.cpp:
```c++
#include "Child.h"
Child::Child() : age(0), name("") {}
Child::Child(int age, std::string name) : age(age), name(name) {}
```