Из трех наследуемых классов получить массив родителя

#include <iostream>
#include <cstring>
using namespace std;
 
class animal{
    protected:
    int id;
    char name[20];
    int grass;
    int meat;
    double food;
    int type;
    public:
        animal();
        virtual void food_calc() = 0;
        double get_food(){return food;}
        int get_id(){return id;}
        char *get_name() {return name;}
        void show();
};
 
 
animal::animal()
{
    cout << "Enter the id: ";
    cin >> id;
    cout << "Enter the name of animal: ";
    cin >> name;    
}
 
void animal::show()
{
    cout << id << ' ';
    cout << name << ' ';
    if(grass == 0) cout << "carnivore ";
    if(meat == 0) cout << "herbivore ";
    if(grass!=0 && meat!=0) cout << "omnivore ";
    cout << food << '\n';
}
 
 
class carnivore: public animal{
    public:
    carnivore();
    void food_calc() {food = meat;}
};
 
carnivore::carnivore()
{
    grass = 0;
    cout << "Enter the number of meat: ";
    cin >> meat;
}
 
class omnivore: public animal{
    public:
    omnivore();
    void food_calc() {food = meat*0.3 + grass*0.7;}
};
 
omnivore::omnivore()
{
    cout << "Enter the number of meat: ";
    cin >> meat;
    cout << "Enter the number of grass: ";
    cin >> grass;   
}
 
class herbivore: public animal{
    public:
    herbivore();
    void food_calc() {food = grass;}
};
 
herbivore::herbivore()
{
    meat = 0;
    cout << "Enter the number of grass: ";
    cin >> grass;
}
 
int main()
{
    
    cout << "How many animals you want to enter?: ";
    int i, choice, t=0, j=0;
    cin >> i;
    while (j!=i){
        cout << "What type of animal will be next?\n";
        cout << "1 - carnivore\n";
        cout << "2 - omnivore\n";
        cout << "3 - herbivore\n";
        cin >> choice;
        if(choice==1){
            carnivore ob;
            ob.food_calc();
        }
        if(choice==2){
            omnivore ob;
            ob.food_calc();
        }
        if(choice==3){
            herbivore ob;
            ob.food_calc();
        }
        j++;
    }
}