Classes and member functions

Hi Folks,
I'm still trying to get my head around Classes...

Specifically, I am having problems defining functions within a class. I can only seem to define them outside a class. If i put them in a class I get compiler errors.

Here is my code. How would I change this to put definitions within the person class?

Also, I get errors if I define the destructor just as ~person();

Code:

---


////////////////////////////////////////////////////
// Demonstrates Class, Member Data, Member Functions
////////////////////////////////////////////////////

#include <iostream>
#include <string>
#include <vector>

using namespace std;

///////////////////////////////////////
// Define person class
///////////////////////////////////////

class person
{
    public:
          /////////////////////////////////
          // constructor
          /////////////////////////////////
         
          person(int age)
          {
          itsname="undefined";
          itsage=age;
          }
         
          /////////////////////////////////             
          // destructor
          /////////////////////////////////
         
          ~person()
          {
         
          }
   
          /////////////////////////////////
          // function prototypes
          /////////////////////////////////

          void setage(int age);
          int getage();
          void setname(string name);
          string getname();
         

    private:
            string itsname;
            int itsage;
};
       
/////////////////////////////////////////////////////////////////////////


          /////////////////////////////////
          // function definitions         
          /////////////////////////////////
         
         
          void person::setage(int age)
                {
                itsage=age;
                }
               
          int person::getage()
                {
                return itsage;
                }
             
          void person::setname(string name)
                {
                itsname=name;
                }
               
          string person::getname()
                {
                return itsname;
                }
                             
/////////////////////////////////////////////////////////////////



///////////////////////////////////////
// Main Program
///////////////////////////////////////
       
int main()
{
           
            /////////////////////////////////////////
            // test class
            /////////////////////////////////////////
           
       
            // create person class called test
       
            person test(9999);                                     
       
       
            // change member variables and print to test
       
            cout << "initial age = " << test.getage() << "\n";   
           
            test.setage(13);
            cout << "altered age = " << test.getage() << "\n";
           
            cout << "initial name = " << test.getname() << "\n";
           
            test.setname("bobbins");
            cout << "altered name = " << test.getname() << "\n";
           
               
            /////////////////////////////////////////
            // wait for user to end program
            /////////////////////////////////////////
             
            cin.get();
            return 0;
}

---

Code:

---

class person
{
    public:
         
          person(int age)
          {
          itsname="undefined";
          itsage=age;
          }
         
          /////////////////////////////////             
          // destructor
          /////////////////////////////////
         
          ~person()
          {
         
          }
   
          void setage(int age)
          {
                itsage=age;
          }

          int getage()
          {
                return itsage;
          }
         
          void setname(string name)
          {
                itsname=name;
          }

          string getname()
          {
                return itsname;
          }
         

    private:
            string itsname;
            int itsage;
};

---

I would also add a few const qualifiers, and place semi-colons between the function definitions, but that's my personal preference.

And I would avoid having "using namespace std;" before the class declaration (yes, that means typing "std::string" instead of "string"). That is a stylistic thing, but has a significant chance of becoming a technical problem if the class declaration is moved into its own header file in future, and that header is #include'd by multiple source files.

Got it!

Many thanks for your help!