20classes_pub_pvt.cpp

#include <iostream>
using namespace std;

class Employee
{
private: // this stores private information and only a public function can access them
    int a, b, c;

public: // this stores public information that can be directly accessed to
    int d, e;
    void setData(int x, int y, int z); // here the function declarated or prototyped
    void getData()                     // here the function is created
    {
        cout << "The value of a is " << a << endl;
        cout << "The value of b is " << b << endl;
        cout << "The value of c is " << c << endl;
        cout << "The value of d is " << d << endl;
        cout << "The value of e is " << e << endl;
    }
};

void Employee ::setData(int x, int y, int z) // syntax for any function of a class so that it could be accessed
{
    a = x;
    b = y;
    c = z;
}
// it is better to create prototyped functions in the classes to maintain clarity

class Animal
{
private:
    char genus[15];
    char family[15];
public:
    char type[15];
    char sound[15];
    void soundmade();
};
void Animal :: sound(char &sound[15])
{
    cout<<"The sound "<<" gives is "<<sound<<endl;
} 
 int main()
{
    // class is a kind of structure which can be protected and can store functions
    Employee vasu;
    // vasu.a = 1; accessing private data results in error
    vasu.d = 12;
    vasu.e = 5;
    vasu.setData(1, 2, 3);
    vasu.getData();

    Animal dog;
    dog.sound = "bark";
    dog.sound("bark");
    return 0;
}