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Public Inheritance Examples
Example:1
To access data elements of the base class from derived class members functions
//public inheritance
//to access data elements of base class from derived class
//members functions
#include<iostream>
#include<conio.h>
using namespace std;
class abc
{
private:
int a;
protected:
int b;
public:
int c;
};
class pqr:public abc
{
private:
int p;
protected:
int q;
public:
int r;
void get();
void disp();
};
void pqr::get()
{
//a=10;//error
b=20;c=30;
p=40; q=50; r=60;
}
void pqr::disp()
{
//cout<<"a= "<<a<<endl;//error
cout<<"b = "<<b<<" c= "<<c<<endl;
cout<<"p = "<<p<<" q = "<<q<<" r = "<<r<<endl;
}
int main()
{
pqr p1;
p1.get();p1.disp();
getch();
return(0);
}
Output:
b = 20 c= 30
p = 40 q = 50 r = 60
Example:2
To access data elements of the base class and derived class from main function i.e. from outside the class
//public inheritance
//to access data elements of base class and derived class
// from main function i.e.outside the class
#include<iostream>
#include<conio.h>
using namespace std;
class abc
{
private:
int a;
protected:
int b;
public:
int c;
};
class pqr:public abc
{
private:
int p;
protected:
int q;
public:
int r;
};
int main()
{
pqr p1;
//p1.abc::b=20; //error
p1.abc::c=30;
p1.r=60;
cout<<"c = "<<p1.abc::c<<endl;
cout<<"r = "<<p1.r<<endl;
getch();
return(0);
}
Output:
c = 30
r = 60
