heterogeneouslist.cpp

Realization of Heterogeneous List using C++

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

class Base {
protected:
    int Serial;
    string Name;
    string Date;
public:
    Base(int serial, string name, string date):Serial(serial),Name(name),Date(date) {}
    virtual ~Base() {}
    virtual void print() { 
        cout << "Serial No. is: " << Serial << endl
             << "Name is: " << Name << endl
             << "Date is: " << Date << endl;
    }
    int getSerial() { return Serial; }
};

class Derived_1 : public Base {
private:
    double Value;
public:
    Derived_1(int serial, string name, string date, double value)
    :Base(serial, name, date),Value(value) {}
    ~Derived_1() {}
    void print() {
        Base::print();
        cout << "Value is: " << Value << endl;
    }
};

class Derived_2 : public Base {
private:
    string Type;
public:
    Derived_2(int serial, string name, string date, string type)
    :Base(serial, name, date),Type(type) {}
    ~Derived_2() {}
    void print() {
        Base::print();
        cout << "Type is: " << Type << endl;
    }
};

class Derived_3 : public Base {
private:
    bool Status; // 0:active    1:inert
public:
    Derived_3(int serial, string name, string date, bool status)
    :Base(serial, name, date),Status(status) {}
    ~Derived_3() {}
    void print() {
        Base::print();
        cout << "Status is: " << Status << endl;
    }
};

class Node {
public:
    Base* Data;
    Node* Next;
    Node(Base* base):Data(base),Next(NULL) {}
};

class List {
private:
    Node* Head;
public:
    List():Head(NULL) {}
    void print();
    void insert(Base*);
    void remove(int);
    void inquiry(int);
};

        void List::print() {
            Node* ptrCurr = Head;

            if(Head == NULL)
                cout << "Empty List.\n";

            while(ptrCurr != NULL) {
                ptrCurr->Data->print();
                ptrCurr = ptrCurr->Next;
                cout << endl;
            }
        }

        void List::insert(Base* base) {
            Node* newnode = new Node(base);
            if(Head == NULL) {
                Head = newnode;
            }
            else {
                newnode->Next = Head;
                Head = newnode;
            }
        }

        void List::inquiry(int serial) {
            Node* ptrCurr = Head;
            
            while( (ptrCurr != NULL)  && (ptrCurr->Data->getSerial() != serial) )
                ptrCurr = ptrCurr->Next;

            if( ptrCurr == NULL )
                cout << "\nOperation Exception.\n" 
                     << "Not Find Element.\n" << endl;
            else {
                cout << "\nFIND.\n";
                ptrCurr->Data->print();
            }
            
            cout << endl;
        }
        
        void List::remove(int serial) {
            Node* ptrCurr = Head;
            Node* ptrPrev = Head;

            while( (ptrCurr != NULL)  && (ptrCurr->Data->getSerial() != serial) ) {
                ptrPrev = ptrCurr;
                ptrCurr = ptrCurr->Next;       
            }

            if(ptrCurr == NULL)
                cout << "\nOperation Exception.\n" 
                     << "Not Find Element.\n" << endl;
            else {
                ptrPrev->Next = ptrCurr->Next;

                cout << "\nThe Following Information Will Be Removed.\n";
                ptrCurr->Data->print();
                
                delete ptrCurr;

                cout << "Delete Completed.\n" << endl;
            }
        }


int main() {
    int enterInquiry;
    int enterDelete;
    
    Derived_1 derived_1(63, "MacBook", "2008-01-15", 14000.0);
    Derived_2 derived_2(110, "TravelMate", "2004-07-04", "Laptop");
    Derived_3 derived_3(150, "Aspire One", "2008-12-25", 1);
    
    List test_list;
    
    //insert operation
    test_list.insert(&derived_1);
    test_list.insert(&derived_2);
    test_list.insert(&derived_3);
    
    test_list.print();
    
    //inquiry operation
    cout << "Search_Enter the Serial No.: \n";
    cin >> enterInquiry;
    test_list.inquiry(enterInquiry);
    
    //delete operation
    cout << "Delete_Enter the Serial No.: \n";
    cin >> enterDelete;
    test_list.remove(enterDelete);
    
    cout << "\nAfter Delete Operation:\n";
    test_list.print();
    
    system("PAUSE");
    return 0;
}