Using constructor when passing an array of objects through composition [closed]

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#include <iostream>
#include <cstring>
using namespace std;

class assistantnurse{
private:
    char* id;
    char dutytime;

public:

    assistantnurse(char[] ="", char =' ');
    void setid(char*);
    void setdutytime(char);
    char* getid()const;
    char getdutytime()const;
    void print()const;
    void inputinfo();
    ~assistantnurse();
};

assistantnurse::~assistantnurse()
{
    delete[] id;
    id=0; 

}

assistantnurse::assistantnurse(char* i, char t)
{
    setid(i);
    setdutytime(t);
}

void assistantnurse::setid(char *i)
{
    int l=strlen(i);
    id=new char[l+1];
    strncpy(id,i,l);
    id[l]='\0';
}

void assistantnurse::setdutytime(char t)
{
    dutytime=t;
}

char* assistantnurse::getid()const{return id;}
char assistantnurse::getdutytime()const{return dutytime;}

void assistantnurse::print()const
{
    cout<<"ID: "<<id<<endl;
    cout<<"Duty time: "<<dutytime<<endl<<endl;
}


void assistantnurse::inputinfo()
{
    char nurseid[20];
    char time;

    cout<<"Enter nurse ID: ";
    cin>>nurseid;

    do
    {
    cout<<"Enter nurse Duty time(d for day/n for night): ";
    cin>>time;
    }while(time!='n' && time!='d');

    setid(nurseid);
    setdutytime(time);
}

class treatingphysician{

private:
    char* id;
    char* phonenumber;
    assistantnurse assistant[2]; //3 assistant nurses through composition from assistantnurse class

public:
    void setid(char*);
    void setphonenumber(char*);
    char* getid()const;
    char* getphonenumber()const;
    void setnurse();
    void getnurse()const;
    treatingphysician(char[] =" ", char[] =" ", assistantnurse[]);
    ~treatingphysician();
    void print()const;
    void inputinfo();
};

void treatingphysician::inputinfo()
{
    char i[20];
    char p[15];

    cout<<"Enter physician ID: ";
    cin>>i;
    setid(i);
    cout<<"Enter physican phone number: ";
    cin>>p;
    setphonenumber(p);



    setnurse();


}

void treatingphysician::print()const
{
    cout<<"Physician ID: "<<id<<endl;
    cout<<"Physician phone number: "<<phonenumber<<endl<<endl;
    getnurse();
}

treatingphysician::~treatingphysician()
{
    delete[] id;
    id=0;
    delete[] phonenumber;
    phonenumber=0;
}


 treatingphysician::treatingphysician(char*i, char*p, assistantnurse k[2]):assistant(k)

{
    setid(i);
    setphonenumber(p);

}

void treatingphysician::setid(char*i)
{
    int l=strlen(i);
    id=new char[l+1];
    strncpy(id,i,l);
    id[l]='\0';
}

void treatingphysician::setphonenumber(char*p)
{
    int l=strlen(p);
    phonenumber=new char[l+1];
    strncpy(phonenumber,p,l);
    phonenumber[l]='\0';
}

char* treatingphysician::getid()const{return id;}
char* treatingphysician::getphonenumber()const{return phonenumber;}

void treatingphysician::setnurse()
{
    for(int i=0;i<3;i++)
    {
        cout<<"Enter info for nurse #"<<i+1<<endl;
        assistant[i].inputinfo();
        cout<<"\n";
    }
}

void treatingphysician::getnurse()const
{
    for(int i=0;i<3;i++)
    {
        cout<<"Nurse #"<<i+1<<" ";
        assistant[i].print();

    }
}


int main()
{
    treatingphysician e;

    e.inputinfo();
    e.print();


    system("pause");
    return 0;
}

two classes; A nurse class and a physician class; The physician has 3 nurses and all his attributes. Using composition to fix this, but i'm stuck on the array of objects for the 3 nurses.

In my second constructor i faced a problem i used to work on composition before with the same method but the only difference is that it wasn't an array of objects used in composition. now I'm stuck.. Please Help

Short example...

`class A{

public: A(); };

class B{ private: A a[2];

public: B(A[]); };

B::B(A c[2]):a(c){}`

Answer 1

Use std::vector instead of raw arrays.

class A
{

    public: 
        A(); 
};
typedef std::vector< A > A_vector;


class B
{ 
    private: 
    A_vector m_a;    

    public: 
    B( A_vector av ) : m_a( av )
    {
    }
};