Define pointer. Give syntax for declaration of pointer.

Define pointer. Give syntax for declaration of pointer. 
by

1 Answer

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;
by

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.

Description : Define pointer.

Last Answer : Pointer is a variable which holds an address of another variable of same data type.

Define pointer. Write syntax for pointer declaration.

Description : Define pointer. Write syntax for pointer declaration.

Last Answer : Definition: A pointer is a variable that stores memory address of another variable which is of similar data type.  Declaration: datatype *pointer_variable_name; 

Give the syntax and use of following with respect to (i) get() (ii) put().

Description : Give the syntax and use of following with respect to (i) get() (ii) put().

Last Answer : (i) get() function: The get() function is member of istream class. It is used to read a single character from the keyboard. Syntax of get() function: get(variable_name); example:  char c; ... /variable_name); example: cout.put( X ); The above example displays character X on the screen.

Describe syntax and use of defining member function outside class. Give one example.

Description : Describe syntax and use of defining member function outside class. Give one example.

Last Answer : Member function that is declared inside a class has to be defined separately outside the class. These member functions associate a membership identify label in the header. This label tells the ... ) A member function can call another member function directly, without using the dot operator. 

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;

Explain structure with syntax and example.

Description : Explain structure with syntax and example.

Last Answer : Structure: The Structure is a user defined data supported by object oriented programming. It has almost similar properties that any other user defined data type possess except all members are public by default.  One can ... cout<<"\nThe Value is "<<d.a; getch();  }

Describe constructor with syntax and example.

Description : Describe constructor with syntax and example.

Last Answer : A constructor is a special member function whose task is to initialize the objects of its class. It is special because its name is same as the class name. The constructor is invoked whenever an object of its associated class ... )//constructor declaration { a=0; } }; void main() { ABC x; }

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(); }

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 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 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 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 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 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

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.

What is abstract class? Give one example of abstract class.

Description : What is abstract class? Give one example of 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. An abstract class is used to define an implementation and is intended to be inherited by child classes. Example: ... >a; } void display() { coutb; } void display1()  { display(); cout

Why friend function is required? Give four characteristics of friend function.

Description : Why friend function is required? Give four characteristics of friend function.

Last Answer : Friend function: Private members of a class cannot be accessed from outside the class. A non-member function cannot have an access to the private data of a class. Sometimes, two classes may need to ... part of a class without affecting its meaning. 6. Usually it has the objects as the arguments.

Explain friend function. Give example.

Description : Explain friend function. Give example.

Last Answer : Friend function: The private members of a class cannot be accessed from outside the class but in some situations two classes may need access of each other s private data. So a common function can be declared which can be made friend of ... xyz x1; a1.get1(); x1.get1(); add(a1,x1); }

Give advantages of object oriented approach over procedure oriented approach.

Description : Give advantages of object oriented approach over procedure oriented approach.

Last Answer : Advantages of object oriented approach over procedure oriented approach: 1. In object oriented approach, through inheritance we can eliminate redundant code and extend the use of existing classes. 2. ... with external systems much simpler. 10. In OOP software complexity can be easily managed.

What do you mean by default argument? Give its suitable example.

Description : What do you mean by default argument? Give its suitable example.

Last Answer : Default argument  Initializing an argument with a value while defining a constructor is referred as constructor with default value. When a constructor with default value is declared in a class, it does not require object to pass value ... void main() { ABC obj1(5); ABC obj2(20,30); }

State the syntax to declare pointer variable with example.

Description : State the syntax to declare pointer variable with example.

Last Answer : General syntax to declare pointer. datatype *var_name; Eg: int var = 20;

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 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.