Server Side Programming Articles - Page 2333 of 2650

We can easily check the Odd or Even by using conditional statements. We can divide the number by 2, then check whether the remainder is 0 or not. If 0, then it is even. We can also perform the AND operation with the number and 1. If the answer is 0, then it is even; otherwise odd. There is no need to use conditional statements in both approaches. We will see two different methods to check the odd or even. Using Modulo Operator The Modulo Operator performs the division operation ... Read More

Operator overloading in C++ is the feature that allows you to define how operators will behave for user-defined data types like classes and structures. Operator overloading and function overloading both support compile-time polymorphism. In the following article, we will learn the rules that need to be followed for operator overloading. Rules for Operator Overloading Only built-in operators can be overloaded. If some operators are not present in C++, we cannot overload them. The arity of the operators cannot be changed. The precedence and associativity of the operators ... Read More

The C++ function std::unordered_multimap::operator=() assigns new contents to the unordered_multimap by replacing old ones and modifies size if necessary.Following is the declaration for std::unordered_multimap::operator=() function form std::unordered_map() header.C++11 (Syntax)unordered_multimap& operator=(const unordered_multimap& umm);Parametersumm - Another unordered_multimap object of same type.Return ValueReturns this pointer.Example Code#include #include using namespace std; int main(void) {    unordered_multimap umm1 = {       {'a', 1},       {'b', 2},       {'c', 3},       {'d', 4},       {'e', 5},    };    unordered_multimap umm2;    umm2 = umm1;    cout

C++ is able to input and output the built-in data types using the stream extraction operator >> and the stream insertion operator and insertion operator

In C++ we can overload some operators like +, -, [], -> etc. But we cannot overload any operators in it. Some of the operators cannot be overloaded. These operators are like below? “.” Member access or dot operator? “? : ” Ternary or conditional operator? “::” Scope resolution operator? “.*” Pointer to member operator? “sizeof” The object size operator? “typeid” Object type operatorThese operators cannot be overloaded because if we overload them it will make serious programming issues.For an example the sizeof operator returns the size of the object or datatype as an operand. This is evaluated by the ... Read More

The Copy constructor and the assignment operators are used to initializing one object to another object. The main difference between them is that the copy constructor creates a separate memory block for the new object. But the assignment operator does not make new memory space. It uses the reference variable to point to the previous memory block.Copy Constructor (Syntax)classname (const classname &obj) { // body of constructor }Assignment Operator (Syntax)classname Ob1, Ob2; Ob2 = Ob1;Let us see the detailed differences between Copy constructor and Assignment Operator.Copy ConstructorAssignment OperatorThe Copy constructor is basically an overloaded constructorAssignment operator is ... Read More

In C++ when we want to create a new object, we have to create a memory block into the memory, then also call constructor to initialize the memory block. We can create memory element by using the new keyword. This new operator is doing two consecutive task. But the operator new just only create memory space.New KeywordThe new operator is a special type of operator, which denotes a request for memory allocation on the heap section. When sufficient memory is available, then only new operators initializes the memory to the pointer variable. When we create an object using a normal ... Read More

The dot and arrow operator are both used in C++ to access the members of a class or structure. They are just used in different scenarios. In C++, types declared as class, struct, or union are considered "of class type". So the following refers to all three of them.a.b is only used if b is a member of the object (or reference to an object) a. So for a.b, a will always be an actual object (or a reference to an object) of a class.a->b is essentially a shorthand notation for (*a).b, i.e., if a is a pointer to an ... Read More

The Copy constructor and the assignment operators are used to initialize one object to another object. The main difference between them is that the copy constructor creates a separate memory block for the new object. But the assignment operator does not make new memory space. It uses reference variable to point to the previous memory block.Copy Constructor (Syntax)classname (const classname &obj) { // body of constructor }Assignment Operator (Syntax)classname Ob1, Ob2; Ob2 = Ob1;Let us see the detailed differences between Copy constructor and Assignment Operator.Copy ConstructorAssignment OperatorThe Copy constructor is basically an overloaded constructorAssignment operator is basically ... Read More

The Pre increment and post increment both operators are used as increment operations. The pre increment operator is used to increment the value of some variable before using it in an expression. In the pre increment the value is incremented at first, then used inside the expression.if the expression is a = ++b; and b is holding 5 at first, then a will hold 6. Because increase b by 1, then set the value of a with it.Example Code#include using namespace std; main () { int a, b = 15; a = ++b; cout