Define pointer.

Define pointer.
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Answer :

Pointer is a variable which holds an address of another variable of same data type.
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Related questions

Define pointer variable. Give its syntax.

Description : Define pointer variable. Give its syntax.

Last Answer : Definition: Pointer is a variable that holds memory address of another variable of similar data type.  Syntax to declare pointer variable: data_type *pointer_variable;

Define pointer. Give syntax for declaration of pointer.

Description : Define pointer. Give syntax for declaration of pointer. 

Last Answer : Definition: Pointer is a variable that holds memory address of another variable of similar data type.  Syntax to declare pointer variable: data_type *pointer_variable;

Write a program which concate and reverse string by using pointer to string.

Description : Write a program which concate and reverse string by using pointer to string.

Last Answer : #include #include void main()  { char str1[20], str2[20], rev[20],*p1,*p2; int cnt=0; clrscr(); coutstr2;  p1=&str1[0];  p2=&str2[0]; while(*p1!='\0')  { p1++;  } while(*p2!='\0')  { *p1=*p2; p1++; p2++;  }  *p1='\0'; cout

Write a program which perform arithmetic operation using pointer.

Description : Write a program which perform arithmetic operation using pointer.

Last Answer : #include<iostream.h> #include<conio.h> void main() { int num[5]={56,75,22,18,90}; int ptr; int i; cout<< array elements are:: ; for(i=0;i<5;i++) ptr=num; cout<< ... 3; cout<< value of ptr+=3:: <<*ptr; cout<< \n ; getch(); }

Explain the derived class access by pointer.

Description : Explain the derived class access by pointer.

Last Answer : When base class and its derived class both contains same function name then the function in base class is declared as virtual using keyword virtual preceding its normal declaration. When a function is made virtual, C ... . Example: #include class Base { public: virtual void show( ) { cout

Write a program to copy content of one string to another string using pointer to string.

Description : Write a program to copy content of one string to another string using pointer to string.

Last Answer : #include<iostream.h> #include<conio.h> void main() { char str1[10],str2[10],*p1,*p2; clrscr(); cout<<"\n Enter a String"; cin>>str1; p1=&str1[0]; p2= ... } *p2='\0'; cout<<"Copied String is "<<str2; getch(); }

Write a program to find length of a string using pointer to string.

Description : Write a program to find length of a string using pointer to string.

Last Answer : #include<iostream.h> #include<conio.h> void main() { char str1[10],*ptr; int len=0; cout<<"enter string:"; cin>>str1; ptr=&str1[0]; while(*ptr!='\0 ... +; } cout<<"\nThe Length of a string is"<<len; getch(); }

Write a program to search a number from an array using pointer to array.

Description : Write a program to search a number from an array using pointer to array.

Last Answer : #include<iostream.h> #include<conio.h> void main() { int a[5],i,*a1,no,flag=1; clrscr(); a1=&a[0]; cout<<"\nEnter array elements :"<<endl; for(i=0;i<5 ... =0) { cout<<"\n\t Number is not present.... "; } getch(); }

Explain pointer to derived class with example.

Description : Explain pointer to derived class with example.

Last Answer : Pointers can be used to point to the base class objects and objects of derived class. Pointers to objects of base class are compatible with pointers to objects of a derived class. Single pointer variable can be made to point ... { int a; public:  void get() { couta; }  void put() { cout

Implement a program to declare a class city with data members city name and state. Accept and display data for 1 object using pointer to object.

Description : Implement a program to declare a class city with data members city name and state. Accept and display data for 1 object using pointer to object.

Last Answer : #include<iostream.h> #include<conio.h> class city { char city_name[20],state[20]; public: void accept() { cout<<"\nEnter city data:"; cout<<"\nName:"; ... ); ptr=&c; ptr->accept(); ptr->display(); getch(); }

Explain the concept of this pointer.

Description : Explain the concept of this pointer.

Last Answer : Concept of this pointer: C++ use a unique keyword called “this” to represent an object that invokes a member function. This unique pointer is automatically passed to a member function when it is invoked. “this” is a pointer that always points to the object for which the member function is called.

Explain pointer arithmetic with example.

Description : Explain pointer arithmetic with example.

Last Answer : C++ allows pointers to perform the following arithmetic operations: a. A pointer can be incremented (++) or decremented (--) b. Any integer can be added or subtracted from a pointer. c. One pointer can be subtracted ... -: 56 value of ptr +2: 22 value of ptr-1: 75 value of ptr+3: 90

Explain the concept of pointer to derived classes.

Description : Explain the concept of pointer to derived classes. 

Last Answer : Pointer to derived class: Pointers can be used to point to the base class objects and objects of derived class. Pointers to objects of base class are type-compatible with pointers to objects of a derived ... of B,then any reference to that member by cptr will always access the base class member. 

Write use of ‘This’ pointer.

Description : Write use of ‘This’ pointer.

Last Answer : this pointer is used to represent an object that invokes a member function. It points to the object for which the function is called. It is also used to access members of object inside function definition of called function

Write a program in C++ to accept a string from a user and display its reverse using pointer.

Description : Write a program in C++ to accept a string from a user and display its reverse using pointer.

Last Answer : #include<iostream.h> #include<conio.h> #include<string.h> void main() { char str[20],*ptr; int l; clrscr(); cout<<"\n Enter a string : "; cin>>str; l=strlen(str); ... (l!=0) { ptr--; cout<<*ptr; l--; } getch(); }

State and describe use of pointer operator and address operator. Give one example of each.

Description : State and describe use of pointer operator and address operator. Give one example of each. 

Last Answer : Pointer operator:- * It is used to declare a pointer variable. Also used as "value at" operator to read value stored inside the address pointed by pointer. Example: int *ptr; Address operator:-& ... address of a variable can be stored in pointer variable. Example: int a,*ptr; ptr=&a;

Describe pointer to object with an example.

Description : Describe pointer to object with an example. 

Last Answer : When address of an object of a class is stored into the pointer variable of the same class type then it is pointer to object. This pointer can be used to access the data member and member functions of same class. ... (); // Invoking getdata()using pointer to object p1. ptr->display(); }

With suitable example, describe use of this pointer.

Description : With suitable example, describe use of this pointer.

Last Answer : 1. C++ uses a unique keyword called this to represent an object that invokes a member function. 2. This unique pointer is automatically passed to a member function when it is invoked. 3. this is a pointer that always ... ; public: void setdata(int x) { this ->a=x; } void putdata() { cout

Write a program in C++ to search an element from an array using pointer.

Description : Write a program in C++ to search an element from an array using pointer.

Last Answer : #include<iostream.h> #include<conio.h> void main() { int a[10], n, i,*p, flag=0, x; clrscr(); cout<<"Enter no. of array elements \n"; cin>>n; cout<< ... } if(flag==0) cout<<x<<"is not found \n"; getch(); }

State two advantages of pointer.

Description : State two advantages of pointer.

Last Answer : Advantages of pointer: Pointers save the memory. Pointers reduce the length and complexity of a program. Pointers allow passing of arrays and strings to functions more efficiently. Pointers make possible to return more than one value from the function. Pointers increase the processing speed.

How to define virtual function? Give example.

Description : How to define virtual function? Give example.

Last Answer : A virtual function is a member function that is declared within a base class and redefined by a derived class. To define virtual function following syntax is used: Class baseclass { virtual function_name() { } ... } }; Example: #include class Base { public: virtual void show( ) { cout

Define constructor. State any two types of constructor.

Description : Define constructor. State any two types of constructor.

Last Answer : Definition: A constructor is a special member function whose task is to initialize the objects of its class. Types of constructor: 1) Default constructor 2) Parameterized constructor 3) Copy Constructor 4) Constructor with default value 5) Multiple constructor/overloaded constructor

How to define a member function outside the body of class?

Description : How to define a member function outside the body of class? 

Last Answer : The user can declare member function outside the class with the help of scope resolution operator (::). The label class_name:: tells the compiler that the function_name belongs to the class class_name. ... In above example accept() member function of class student is defined outside of the class. 

Define multiple inheritance. Give example.

Description : Define multiple inheritance. Give example.

Last Answer : Multiple Inheritance: When a single class is derived from more than one base class then it is known as multiple inheritance. A derived class can inherit the attributes of all base classes from which it ... derived class derived from two base classes base class Test and base class Sports .  

Define polymorphism. Enlist its types.

Description : Define polymorphism. Enlist its types.

Last Answer : Definition: Polymorphism means ability to take more than one form that means a program can have more than one function with same name but different behavior. Types of polymorphism: 1) Compile time polymorphism 2) Runtime polymorphism 

Define the following terms: (i) Data abstraction (ii) Class (iii) Dynamic binding (iv) Polymorphism

Description : Define the following terms: (i) Data abstraction (ii) Class (iii) Dynamic binding (iv) Polymorphism

Last Answer : (i) Data abstraction: Abstraction refers to the act of representing essential features without including the background details or explanation. Data abstraction is the process of defining a data type, often ... more than one form at different instances depending on the type or number of arguments. 

Define abstract class.

Description : Define abstract class.

Last Answer : An abstract class is a class that is designed only to act as base class. It is not used to create objects.

What is constructor? How user can declared constructor in derived class? Explain with example.

Description : What is constructor? How user can declared constructor in derived class? Explain with example.

Last Answer : Constructor:- Constructor is a special member function which has same name as a class name and is used to initialize object during compile time of program. Declaring constructor in derived class If a base class contains a ... derived d(2,5); d.displaybase(); d.display(); getch(); }

What is function? What is call by value? What is call by reference? What is the difference between them?

Description : What is function? What is call by value? What is call by reference? What is the difference between them?

Last Answer : Function: A function is a group/set of statements/instruction that performs a specific task. It can be system defined i.e. clrscr(), getch(), or user defined i.e. add(), sub(). ... reflected inside as well as outside the function. Difference between Call by Value and Call by Reference:

What is polymorphism? Enlist different types of polymorphism. What are the differences between them?

Description : What is polymorphism? Enlist different types of polymorphism. What are the differences between them?

Last Answer : Polymorphism: It is a feature of object oriented programming which allows a programmer to have a more than one function having same name but different /same parameters but performs different/ ... Compile Time polymorphism o Virtual Function Difference between Types of Polymorphism:

What is structure? How user declare structure? Give example.

Description : What is structure? How user declare structure? Give example.

Last Answer : Structure is a collection of different data types written under a common name. It is a user defined data type. To Define a structure following Syntax is use:- struct structure_name { data_type variable 1; data_type ... () {  Person p1; cout>p1.name; cout> p1.age; cout> p1.salary; cout

What is copy constructor? Explain with example.

Description : What is copy constructor? Explain with example.

Last Answer : Copy constructor: The copy constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously. The copy constructor is used to: ... ; // Copy constructor is called here // Let us access values assigned by constructors cout

Explain how to pass object as function argument.

Description : Explain how to pass object as function argument.

Last Answer : An object may be used as function arguments in two methods:- i) A copy of the entire object is passed to the function. ii) Only the address of the object is transferred to the function. 1) Pass-by-value Since a copy ... (int h, int m) { hours = h; minutes = m; } void puttime(void)  { cout

Write a program which implement the concept of overloaded constructor.

Description : Write a program which implement the concept of overloaded constructor.

Last Answer : #include #include class integer { int m,n; public: integer() { m=0; n=0; } //default constructor 1 integer(int a, int b) { m=a; n=b; } //Parameterized constructor 2 integer(integer &i) { m=i.m; n=i.n; } //copy constructor 3 }; void display() { cout

Explain different operator used in C++.

Description : Explain different operator used in C++.

Last Answer : :: Scope resolution operator: This operator allows access to the global version of a variable. Scope resolution operator is also used in classes to identify the class to which a member function belongs. :: ... and assigns it to the variable on its right. It is used with cin statement to input data.

Explain the need of static member function with example.

Description : Explain the need of static member function with example.

Last Answer : A static member function can have access to only other static members (functions or variables) declared in the same class. A static member function can be called using the class name as follows: class_name:: ... test::showcount(); -------------Call to static member function. }

Write down characteristics of object oriented programming.

Description : Write down characteristics of object oriented programming.

Last Answer : Characteristics of object oriented programming are: Emphasis is on data rather than procedure. Programs are divided into objects. Data structures are designed such that they characterize the ... can be easily added whenever necessary. Follows bottom-up approach in program designing. 

What is base class? What is derived class? Give example.

Description : What is base class? What is derived class? Give example.

Last Answer : Base class: In inheritance a new class is derived from an old class. The old/existing class is referred as base class whose properties can be inherited by its derived class. Derived class: In inheritance a new ... as well as base class. Example: class base { public: void putb() { cout

What is pure virtual functions? Write down the rules used for pure virtual function.

Description : What is pure virtual functions? Write down the rules used for pure virtual function.

Last Answer : A pure virtual function is a function which is declared in a base class and which does not have definition relative to the base class. In such cases, the compiler requires each derived class to either ... A class containing pure virtual functions cannot be used to declare any objects of its own.  

What is destructor? How destructor is declared? When destructor is invoked?

Description : What is destructor? How destructor is declared? When destructor is invoked?

Last Answer : Destructor: A destructor is a special member function used to destroy the objects that are created by a constructor. Declaration: Destructor is declared in public section of a class. It is member function ... from the program (or block or function) to clean up storage that is no longer accessible. 

What is multiple inheritance? What is multilevel inheritance? What is difference between them?

Description : What is multiple inheritance? What is multilevel inheritance? What is difference between them?

Last Answer : Multiple Inheritance: When A derived class is derived from more than one base class then it is known as multiple inheritance. A derived class can inherit the attributes of all base classes ... , last derived class will inherit only public property of all class including intermediate class.

What is parametrized constructor? Explain with example.

Description : What is parametrized constructor? Explain with example.

Last Answer : A constructor that can take arguments is known as parameterized constructor. In some applications, it may be necessary to initialize the various data members of different objects with different values when they ... object is created. Member function put displays the value of data member m . 

What do you mean by overloaded constructor?

Description : What do you mean by overloaded constructor?

Last Answer : When more than one constructor function is defined in a class, it is referred as overloaded constructor. Each overloaded constructor function is invoked with respect to arguments pass in the function call.

Write a program to find whether the string is palindrome or not.

Description : Write a program to find whether the string is palindrome or not.

Last Answer : #include #include #include void main() { char str1[10],str2[10]; int c; clrscr(); coutstr1; strcpy(str2,str1); strrev(str2); cout

Write a program for multiple inheritance.

Description : Write a program for multiple inheritance. 

Last Answer : #include #include class base1 { public: void show1() { cout

Write a program to show object as function argument.

Description : Write a program to show object as function argument. 

Last Answer : #include<iostream.h> #include<conio.h> #include<string.h> class objarg  { char str[10]; public: void get() { cout<<"\n Enter a Message"; cin>>str; } void ... clrscr(); o1.get(); o2.copy(o1); o2.display(); getch();  }

What is the need of virtual function? Explain with example.

Description : What is the need of virtual function? Explain with example.

Last Answer : When base class and its derived class both contain same name and prototype member function then derived class function overrides base class function. Base class pointer is used to refer member functions of its ... Program/Example: #include class Base { public: virtual void show( ) { cout

Give four differences between object oriented programming and procedure oriented programming.

Description : Give four differences between object oriented programming and procedure oriented programming.

Last Answer : Give four differences between object oriented programming and procedure oriented programming.

State characteristic of static data member. Explain why static data member must be defined outside the class.

Description : State characteristic of static data member. Explain why static data member must be defined outside the class. 

Last Answer : Characteristics of static data members: 1. It is initialized to zero when the first object of its class is created. No other initialization is permitted. 2. Only one copy of that member is created ... member(s) it is necessary to make static members global and re-declared outside of the class.

Polymorphism is implemented using function overloading. Justify the statement.

Description : Polymorphism is implemented using function overloading. Justify the statement.

Last Answer : Polymorphism is a mechanism that allows a developer to have more than one function with same name but different signature. In function overloading, one can make use of more than one function with different signature as well. Hence ... main()  { int a[10],i,isum; float b[5],fsum; clrscr(); cout