Questions and Answers
What is a data member also called as?
All of the above
Where do member functions get their space?
Shared by all objects of the same class
What is a class in C++?
A collection of data members and member functions
What type of class can we instantiate?
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What type of member function is defined by the compiler under certain circumstances?
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How many times does a data member get space?
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What is another name for a member function?
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What is not a type of data member?
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What is the purpose of the accept_record function?
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What is the difference between the two implementations of the Employee struct?
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What is the role of the print_record function?
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What is the impact of making the members of the Employee struct private?
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Why is the accept_record function rewritten as a member function in the second implementation?
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What is the significance of the Employee emp object in the main function?
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What is the purpose of the scanf
function in the given code?
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Why is the -> operator used to access the members of the Employee struct?
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What is the difference between emp.name
and emp.empid
?
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What is the purpose of the struct Employee declaration?
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What is the benefit of using a struct to represent an Employee?
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What is the purpose of the struct Employee
?
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What is the significance of the public keyword in the second implementation?
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What is the difference between the local structure and the global structure?
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What is the purpose of the print
function in the global structure example?
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What is the purpose of the ptr->name
syntax?
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What is the purpose of the &emp
syntax?
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What is the output of the program in the global structure example?
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What is the purpose of the struct Employee emp;
statement?
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What is a program in the context of C++?
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Study Notes
C++ Programming
Local Structure
- A local structure is defined within a function or block.
- It is a user-defined data type that contains variables of different data types.
- Example:
struct Employee { char name; int empid; float salary; };
Global Structure
- A global structure is defined outside a function or block.
- It can be used throughout the program.
- Example:
struct Employee { char name; int empid; float salary; };
defined at the top of the program.
Functions
-
void accept_record(struct Employee *ptr)
is a global function that takes a pointer to astruct Employee
as a parameter. - It is used to accept input for an employee's record.
-
void print_record(struct Employee *ptr)
is a global function that takes a pointer to astruct Employee
as a parameter. - It is used to print an employee's record.
Accessing Structure Members
- Members of a structure can be accessed using the
->
operator if a pointer to the structure is used. - Example:
ptr->name
,ptr->empid
,ptr->salary
. - Members of a structure can be accessed using the
.
operator if an object of the structure is used. - Example:
emp.name
,emp.empid
,emp.salary
.
Member Functions
- A member function is a function defined inside a class or structure.
- It is also called a method or operation.
- Member functions do not get space inside an object.
- All objects of the same class share a single copy of a member function.
Class
- A class is a keyword in C++.
- It is a collection of data members and member functions.
- It is a basic unit of encapsulation.
- A class can contain:
- Data members (non-static and static)
- Member functions (non-static and static)
- Nested types (not in syllabus)
Special Member Functions
- Some member functions are special and are defined by the compiler under certain circumstances:
- Constructor
- Destructor
- Copy constructor
- Assignment operator function
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Description
This quiz covers basic C++ programming concepts, including input/output operations using printf and scanf, and printing variables. It is based on a C++ program that takes user input for employee ID and salary, and then displays the input values.