a++

int a = 1;
cout << a++ <<endl;
cout << a++;

1
2

++a

int a = 1;
cout << ++a <<endl;
cout << ++a;

2
3

#include <iostream>

using namespace std;

class publiction {
protected:
    string title;
    float price;
public:
    publiction(string n, float p) {
        title = n;
        price = p;
    }
};

class Book : public publiction {
protected:
    int pageCount;
public:
    Book(string n, float pri, int page) : publiction(n, pri) {
        pageCount = page;
    }

    void display() {
        cout << "The Title Of Book Is " << title << endl;
        cout << "The Price Of Book = " << price << "$" << endl;
        cout << "The Number Of Page  = " << pageCount << endl;
    }
};

class Tape : public publiction {
protected:
    float time;
public:
    Tape(string n, float p, float m) : publiction(n, p) {
        time = m;
    }

    void displaytime() {
        cout << "The Time You Need = " << time << " Minutes" << endl;
    }
};

int main() {
    string n;
    float a, b;
    int x;

    cout << "Enter The Title" << endl;
    cin >> n;
    cout << "Enter The Price" << endl;
    cin >> a;
    cout << "Enter The Time" << endl;
    cin >> b;
    cout << "Enter The Number Of Page " << endl;
    cin >> x;

    Book obj(n, a, x);
    Tape g(n, a, b);
    obj.display();
    g.displaytime();

    return 0;
}