The mechanism of deriving a class from another derived class is known as multilevel inheritance in C++. e.g: Class base { }; class dervied1: public base { }; class deriverd2 :public derived1 { };
# include <iostream.h> class person char name[10]; public: void read_name() { cout<<”\n Input Name”; cin>>name; } void print_name() { cout <<”\n Name “<<name; } class student:public person int rno; public: void read_rno() { cout<<”\n Input roll no”; cin>>rno; } void print_rno() { cout<<”\n Rollno”<<rno; }; clas student :: public Mca_student int sub1,sub2; public: void read_subjects() { cout <<”\n Input two subjects”; cin >>sub1>>sub2: } void print_subjects() { cout <<”\n Subject1”<<sub1; cout<<”\n Subject2<<sub2; }; void main() { Mca_student stud1; stud1.read_ stud1; stud1.read_name(); stud1.read_rno(); stud1.read_ subjects(); stud1.print_name(); stud1.print_rno(); stud1.print_subjects(); }
#include <iostream.h> class base public: base() { cout<<”\n Inside base class constructor”; }; class derived :public base public : derived () { cout<<”\n Inside derived class constructor”; }; void main() { clrscr(); derived d1; }
#include <iostream.h> # include<string.h> #include<conio.h> class account { int accno; char name[10]; public : account(int acno,charn[ ]) accno=acno; strcpy(name,n); void pront_accno_name() { cout<”\n Account No”<<accno; cout<<”\n Customer name”<< name; } Class saving _account: public account char cheq_fac; public: saving_account(int a, char n[ ],char c)): account(a,n) cheq_fac=c; void print_cheq_fac() { cout<<”\ n Chaqfac”<<cheq_fac; }; void main() { clrscr(); saving_account acc1(101,”abc”,’y’); acc1.print_accno_name(); acc1.print_cheq_fac(); } Non-parameter => implicitly Parameter=> Explicitly
# include<iostream.h> # include<conio.h> class base public: base() { cout<<”\n Inside non parameterized constructor of base class”; } base (int x) { cout <<”\n Inside parameterized constructor of base class”; }; class derived :public base public: derived ():base(10) cout<<”\n Inside non parameterised constructor of derived class”; derived (int x) // default constructor of base class cout <<”\n Inside parameterised constructor of derived class”; }; void main() { derived d1; derived d2(10); } Destructor in inheritance:
E.g: # include <iostream.h> # include <conio.h> class base { public: base() { cout<<”\n Inside constructor of base class”; } base () cout<<”\n Inside destructor of base class”; } class derived :public base{ public: derived() { cout<<”\n Inside constructor of derived class”; } derived() { cout <<\n Destructor of derived class”; }; void main() { clrscr(); derived d1; }
E.g: # include <iostream.h> class base { public: void fun1() { cout<<”\n Inside base class function 1”; }}; class derived :public base { public: void fun1(){ (Inherited from base class & used in derived class) cout<<”\n Inside overriding function”; }; void main() { derived d; d.fun1(); } E.g: # include <iostream.h> # include<conio.h> class person { Char name[10]; public: void read() { cout<<”\n Input name”; cin>>name; } void print() { cout<<”\n Name”>>name; }}; class customer :public person { int id; float credit_limit; public: void read() { person:: read(); cout<<”\n Input id”; cin>>id; cout<<”\n Input credit_limit; } void print() { person::print(); cout<<”\n Id”<<id; cout<<”\n Credit Limit”<<credit_limit; }}; void main() { clrscr(); customer cust1; cust1.read(); // overriding base class in derived class cust1.print(); } O/p: input name desy input id 123 Input credit_limit Name desy Id 123 Credit_limit 1.37561 # include <iostream.h> # include<conio.h> class animal { public: void walk() { cout<<”\n animal walk”; }}; class dog:public animal { public: void walk() { cout<<”\n dog walk”; }}; class cat:public animal { public: void walk() { cout<<”\n Cat walk”; }}; void main() { dog d; cat c; d.walk(); c.walk(); }
You liked the article?
Like : 0
Vote for difficulty
Current difficulty (Avg): Medium
1/15
TekSlate is the best online training provider in delivering world-class IT skills to individuals and corporates from all parts of the globe. We are proven experts in accumulating every need of an IT skills upgrade aspirant and have delivered excellent services. We aim to bring you all the essentials to learn and master new technologies in the market with our articles, blogs, and videos. Build your career success with us, enhancing most in-demand skills in the market.
Stay Updated
Get stories of change makers and innovators from the startup ecosystem in your inbox