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Overloaded '+=' assignment operator

/* Overloaded '+=' assignment operator */ #include <iostream> using namespace std; class Distance{ private: int feet; float inches; public: Distance() : feet(0), inches(0.0){ } Distance(int ft, float in) : feet(ft), inches(in){ } void getdist(){ cout << "\nEnter feet: "; cin >> feet; cout << "Enter inches: "; cin >> inches; } void showdist() const{ cout << feet << "\'-" << inches << '\"'; } void operator += ( Distance ); }; void Distance::operator += (Distance d2){ feet += d2.feet; inches += d2.inches; if(inches >= 12.0) { inches -= 12.0; feet++; } } int main(){ Distance dist1; dist1.getdist(); cout << "\ndist1 = "; dist1.showdist(); Distance dist2(11, 6.25); cout << "\ndist2 = "; dist2.showdist(); dist1 += dist2; cout << "\nAfter addition,"; cout << "\ndist1 = "; dist1.showdist(); cout << endl; return 0; }

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.

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 computer programming, we use the if statement to run a block code only when a certain condition is met. An if statement can be followed by an optional else statement, which executes when the boolean expression is false. There are three forms of if...else statements in C++: • if statement, • if...else statement, • if...else if...else statement, The if statement evaluates the condition inside the parentheses ( ). If the condition evaluates to true, the code inside the body of if is executed. If the condition evaluates to false, the code inside the body of if is skipped.

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:

#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. This directive is read by the preprocessor and orders it to insert the content of a user-defined or system header file into the following program. These files are mainly imported from an outside source into the current program. The process of importing such files that might be system-defined or user-defined is known as File Inclusion. This type of preprocessor directive tells the compiler to include a file in the source code program.

Consider a situation, when we have two persons with the same name, jhon, in the same class. Whenever we need to differentiate them definitely we would have to use some additional information along with their name, like either the area, if they live in different area or their mother's or father's name, etc. Same situation can arise in your C++ applications. For example, you might be writing some code that has a function called xyz() and there is another library available which is also having same function xyz(). Now the compiler has no way of knowing which version of xyz() function you are referring to within your code.

n C++, we can change the way operators work for user-defined types like objects and structures. This is known as operator overloading. Suppose we have created three objects c1, c2 and result from a class named Complex that represents complex numbers. Since operator overloading allows us to change how operators work, we can redefine how the + operator works and use it to add the complex numbers of c1 and c2 by writing the following code:

Return distance between iterators. Calculates the number of elements between first and last. If it is a random-access iterator, the function uses operator- to calculate this. Otherwise, the function uses the increase operator (operator++) repeatedly. The distance() function in C++ helps find the distance between two iterators. In other words, we can use this function to calculate the number of elements present between the two iterators. This function is available in the <iterator> header file. InputIterator shall be at least an input iterator. Function returns the number of elements between first and last.

The cin object is used to accept input from the standard input device i.e. keyboard. It is defined in the iostream header file. C++ cin statement is the instance of the class istream and is used to read input from the standard input device which is usually a keyboard. The extraction operator(>>) is used along with the object cin for reading inputs. The extraction operator extracts the data from the object cin which is entered using the keyboard. The "c" in cin refers to "character" and "in" means "input". Hence cin means "character input". The cin object is used along with the extraction operator >> in order to receive a stream of characters.

A program shall contain a global function named main, which is the designated start of the program in hosted environment. main() function is the entry point of any C++ program. It is the point at which execution of program is started. When a C++ program is executed, the execution control goes directly to the main() function. Every C++ program have a main() function.

This is a C++ Program to check whether path exists between two given nodes. The idea is to run the 'Depth First search' algorithm with the given source node, if during 'dfs' we visit

#include: This statements tells the compiler to include iostream file. This file contains pre defined "input/output functions" that we can use in our program. Comments as the names

You'll learn to print the number entered by a user using C++ cout statement. This program asks user to enter a number. When enters an 'integer', it is stored in variable number using