Question

I’m trying to define an array of type Class, for my homework. The classB and classC is defined inside another classA, and I have to define the an Array which
is defined inside classC of type classB. Below is the code I’m writing.

//main.cpp
...
//cop.h
class cop
{
    public:
        ....
        class Person
        {
            private:
                static char name;
                static char age;
                static char gender;
        };
        class Station
        {
            public:
                Station();
                ~Station();
            private:
                Person personArray[20];
            protected:
                void visit();

        };

//cop.cpp
char cop::Person::name;
char cop::Person::age;
char cop::Person::gender;

cop::Station::Station(){}
cop::Station::~Station(){}
Person cop::Station::personArray[20];

I get following ERROR;

‘Person’ does not name a type

Answer 1

First of all (as I’m pointing out later) the fields of Person should not be static. After that, remove the following lines:

char cop::Person::name;
char cop::Person::age;
char cop::Person::gender;

Person cop::Station::personArray[20];

Properly designed your code should read like the following:

    // Person.h
    class Person
    {
        public:
            char name;
            char age;
            char gender;
    };

    // Station.h
    class Station
    {
        public:
            Station();
            ~Station();
        private:
            Person personArray[20];
        protected:
            void visit();

    };

    // Station.cpp
    Station::Station()
    {
        for (int i = 0; i < 20; i++)
        {
            personArray[i].age = ...;
        }
    }

By the way: declaring all fields of the Person class static will definitely make sure that all persons in your array have the same name, age and gender…