There is no such operator in C++. Sometimes, we need to create wrapper types. For example, types like unique_ptr, shared_ptr, optional and similar. Usually, these types have an accessor member function called .get but they also provide the operator→ to support direct access to the contained value similarly to what ordinary pointers do.The problem is that sometimes we have a few of these types nested into each other. This means that we need to call .get multiple times or to have a lot of dereference operators until we reach the value.Something like this −wrapper wp; wp.get().get().length(); wp.get()->length();This can be a ... Read More

std::cout is an object of class ostream that represents the standard output stream oriented to narrow characters (of type char). It corresponds to the C stream stdout. The standard output stream is the default destination of characters determined by the environment. This destination may be shared with more standard objects (such as cerr or clog).As an object of class ostream, characters can be written to it either as formatted data using the insertion operator (operator

The C++ standard library comprises of different types of libraries. The following is a list of all these Types with the libraries under them.Utilities library − General purpose utilities like program control, dynamic memory allocation, random numbers, sort and search  −Functions and macro constants for signal management(eg SIGINT, etc)  −Macro (and function) that saves (and jumps) to an execution context − Handling of variable length argument lists − Runtime type information utilities − class template of std::bitset − Function objects, Function invocations, Bind operations and Reference wrappers − Various utility components − C-style time/date utilites − standard macros and typedefs(since ... Read More

Operator precedence determines the grouping of terms in an expression. The associativity of an operator is a property that determines how operators of the same precedence are grouped in the absence of parentheses. This affects how an expression is evaluated. Certain operators have higher precedence than others; for example, the multiplication operator has higher precedence than the addition operator:For example x = 7 + 3 * 2; here, x is assigned 13, not 20 because operator * has higher precedence than +, so it first gets multiplied with 3*2 and then adds into 7.Here, operators with the highest precedence appear ... Read More

C++ provides two pointer operators, which are Address of Operator (&) and Indirection Operator (*). A pointer is a variable that contains the address of another variable or you can say that a variable that contains the address of another variable is said to "point to" the other variable. A variable can be any data type including an object, structure or again pointer itself.The indirection Operator (*), and it is the complement of &. It is a unary operator that returns the value of the variable located at the address specified by its operand. For example, Example#include using namespace ... Read More

C++ provides two pointer operators, which are Address of Operator (&) and Indirection Operator (*). A pointer is a variable that contains the address of another variable or you can say that a variable that contains the address of another variable is said to "point to" the other variable. A variable can be any data type including an object, structure or again pointer itself.The address of Operator (&), and it is the complement of *. It is a unary operator that returns the address of the variable(r-value) specified by its operand. For example, Example#include using namespace std; int main ... Read More

The dot and arrow operator are both used in C++ to access the members of a class. They are just used in different scenarios. In C++, types declared as a class, struct, or union are considered "of class type". So the following refers to both of them.a.b is only used if b is a member of the object (or reference[1] 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, ie, if a is a pointer to an object, ... Read More

The dot and arrow operator are both used in C++ to access the members of a class. They are just used in different scenarios. In C++, types declared as a class, struct, or union are considered "of class type". So the following refers to both of them.a.b is only used if b is a member of the object (or reference[1] 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, ie, if a is a pointer to an object, ... Read More

The conditional operator (? :) is a ternary operator (it takes three operands). The conditional operator works as follows −The first operand is implicitly converted to bool. It is evaluated and all side effects are completed before continuing.If the first operand evaluates to true (1), the second operand is evaluated.If the first operand evaluates to false (0), the third operand is evaluated.The result of the conditional operator is the result of whichever operand is evaluated — the second or the third. Only one of the last two operands is evaluated in a conditional expression. The evaluation of the conditional operator ... Read More

Unary operator is operators that act upon a single operand to produce a new value. The unary operators are as follows:OperatorsDescriptionIndirection operator (*)It operates on a pointer variable and returns an l-value equivalent to the value at the pointer address. This is called "dereferencing" the pointer.Address-of operator (&)The unary address-of operator (&) takes the address of its operand. The operand of the address-of operator can be either a function designator or an l-value that designates an object that is not a bit field and is not declared with the register storage-class specifier.Unary plus operator (+)The result of the unary plus ... Read More