C++ Programming Code Examples
C++ > Beginners Lab Assignments Code Examples
Order of Constructor Call
/* Order of Constructor Call
When a default or parameterized constructor of a derived class is called, the default constructor of a base class is called automatically. As you create an object of a derived class, first the default constructor of a base class is called after that constructor of a derived class is called.
To call parameterized constructor of a base class you need to call it explicitly as shown below. */
Student(string szName, int iYear, string szUniversity) :Person(szName, iYear)
{
}
//base class
class Person
{
public:
Person()
{
cout << "Default constructor of base class called" << endl;
}
Person(string lName, int year)
{
cout << "Parameterized constructor of base class called" << endl;
lastName = lName;
yearOfBirth = year;
}
string lastName;
int yearOfBirth;
};
//derived class
class Student :public Person
{
public:
Student()
{
cout << "Default constructor of Derived class called" << endl;
}
Student(string lName, int year, string univer)
{
cout << "Parameterized constructor of Derived class called" << endl;
university = univer;
}
string university;
};
The C++ comments are statements that are not executed by the compiler. The comments in C++ programming can be used to provide explanation of the code, variable, method or class. If we write comments on our code, it will be easier for us to understand the code in the future. Also, it will be easier for your fellow developers to understand the code. By the help of comments, you can hide the program code also. There are two types of comments in C++: • Single Line comment. • Multi Line comment
The main purpose of C++ programming is to add object orientation to the C programming language and classes are the central feature of C++ that supports object-oriented programming and are often called user-defined types. A class is used to specify the form of an object and it combines data representation and methods for manipulating that data into one neat package. The data and functions within a class are called members of the class.
In C++, constructor is a special method which is invoked automatically at the time of object creation. It is used to initialize the data members of new object generally. The constructor in C++ has the same name as class or structure. Constructors are special class functions which performs initialization of every object. The Compiler calls the Constructor whenever an object is created. Constructors initialize values to object members after storage is allocated to the object. Whereas, Destructor on the other hand is used to destroy the class object. • Default Constructor: A constructor which has no argument is known as default constructor. It is invoked at the time of creating object.
As the name already suggests, these operators help in assigning values to variables. These operators help us in allocating a particular value to the operands. The main simple assignment operator is '='. We have to be sure that both the left and right sides of the operator must have the same data type. We have different levels of operators. Assignment operators are used to assign the value, variable and function to another variable. Assignment operators in C are some of the C Programming Operator, which are useful to assign the values to the declared variables. Let's discuss the various types of the assignment operators such as =, +=, -=, /=, *= and %=. The following table lists the assignment operators supported by the C language:
This is a C++ Program to implement Graham Scan algorithm. 'Graham's scan' is a method of computing the convex hull of a finite set of points in the plane with time complexity O(n
Start the C++ program. Declare the base class emp. Define and declare the function get() to get the employee details. Declare the derived class salary. "Declare and define" the function
In The C++ programming, When a default or parameterized constructor of a derived class is called, the "Default Constructor" of a base class is called automatically. As you create an
The 'C++ program' tries to count alphabetical letters from d to n, but a break makes it stop when it encounters k: In a for statement, the 'break' can stop the counting when particular
