Server Side Programming Articles - Page 2560 of 2646

sizeof is not a real operator in C++. It is merely special syntax that inserts a continuing equal to the size of the argument. sizeof doesn’t want or have any runtime support. Sizeof cannot be overloaded because built-in operations, such as incrementing a pointer into an array implicitly depends on it.The C standard specifies that sizeof should be implemented as an operator. In most compilers, the value of sizeof is substituted by a constant equal to it at the compile time itself.example#include using namespace std; int main() {    cout

In C++, both relational Operators (==) with std::string and std::string::compare() are used to compare two strings for equality, but there's a minor difference in both of these; == compares and returns the results in Boolean, whereas compare() checks lexicographically and returns the result in integers. In this article, we will see a more detailed comparison between these two methods and their uses in different scenarios. The == Operator The relational operator (==) is used to compare two values; it checks if the two given values are equal or not and returns the result in Boolean (True ... Read More

In C Programming, the values hold on in 2 variables will be compared exploitation following operators and relation between them will be determined. These operators are called relational operators. Various C++ relational operators available are-OperatorsDescription>Greater than>=Greater than or equal to

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

The compound assignment operators are specified in the form e1 op= e2, where e1 is a modifiable l-value not of const type and e2 is one of the following −An arithmetic typeA pointer, if op is + or –The e1 op= e2 form behaves as e1 = e1 op e2, but e1 is evaluated only once.The following are the compound assignment operators in C++ −OperatorsDescription*=Multiply the value of the first operand by the value of the second operand; store the result in the object specified by the first operand./=Divide the value of the first operand by the value of the ... Read More

C++ has 5 basic arithmetic operators. They are −Addition(+)Subtraction(-)Division(/)Multiplication(*)Modulo(%)These operators can operate on any arithmetic operations in C++. Let's have a look at an example −Example#include using namespace std; main() {    int a = 21;    int b = 10;    int c ;    c = a + b;    cout

&& is a new reference operator defined in the C++11 standard. int&& a means "a" is an r-value reference. && is normally only used to declare a parameter of a function. And it only takes an r-value expression.Simply put, an r-value is a value that doesn't have a memory address. E.g., the number 6 and character 'v' are both r-values. int a, a is an l-value, however, (a+2) is an r-value. Example #include using namespace std; void foo(int&& a) { cout

There is a big distinction between the suffix and prefix versions of ++. In this article, we will see the differences between them and will go through it's examples. Prefix version (++i) In the prefix version (i.e., ++i), the value of i first increments, and then the value of the expression becomes the new value of i. So basically it first increments and then assigns a value to the expression. Postfix version (i++) In the postfix version (i.e., i++), the value of I first increments, but the value ... Read More

A friend function of a class is defined outside that class' scope but it has the right to access all private and protected members of the class. Even though the prototypes for friend functions appear in the class definition, friends are not member functions.A friend can be a function, function template, or member function, or a class or class template, in which case the entire class and all of its members are friends.To declare a function as a friend of a class, precede the function prototype in the class definition with keyword friend as follows −class Box {    double ... Read More

In C++, the new operator is mainly used for allocating memory on the heap, but to initialize that memory, you need to explicitly declare and provide a value to it.Here, the new operator dynamically allocates memory for a variable or object during runtime and returns a pointer to the allocated memory.  Here are the following ways you can initialize memory using the new operator: For built-in types For arrays For objects new Operator in Built-in Types The built-in types are the basic data types in C++, which ... Read More