Accessors and Mutators C++

I am currently trying to learn C++ and following an instruction. I've researched on mutators and accessors but I need a simple explanation.

class Customer { public: Customer(); ~Customer(); private: string m_name; int m_age; }; 

Right the code above is in a header file. Within the instructions it is asking me to set a public accessors and mutator for both data. How do I do this?

Also it mentions checking the age is not negative in the mutator. I know how to implement the code but I'm just confused on where to place it. Do I place the validation in this header file? or in the .cpp? or in the main method?

I know this sounds all silly and I'm sure simple but I'd like to try and understand this.

1 Answer

Please note that this is basic C++.

Accessor - Member function used to retrieve the data of protected members.

Mutators - Member function used to edit the data of protected members.

In your case,

class Customer { public: Customer(); ~Customer(); string getName(); // Accessor for the m_name variable void editName(string in); // Mutator for the m_name variable private: string m_name; int m_age; }; 

Inside your .cpp file:

string Customer::getName() { return m_name; } void Customer::editName(string in) { m_name = in; }