C++ Tutorial Index

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C++ Control Statements

C++ If C++ Nested if C++ If-else C++ If-else-if C++ Switch C++ Break C++ Continue C++ Goto C++ For loop C++ While loop C++ Do while loop

C++ Functions

C++ Call by Value C++ Call by Reference C++ Recursion Function C++ Inline function C++ Friend function

C++ Arrays

Single dimension array Two dimension array

C++ Strings

C++ Strings

C++ Inheritance

C++ Inheritance Single level Inheritance Multilevel Inheritance Multiple Inheritance Hierarchical Inheritance Hybrid Inheritance

C++ Polymorphism

C++ Polymorphism C++ Overloading C++ Overriding C++ Virtual Function

C++ Pointers

C++ Pointers C++ this pointer

C++ Exception Handling

C++ Exception Handling

C++ Constructors

C++ Constructors Default Constructor Parameterize Constructor Copy constructor Constructor Overloading Destructor

C++ File Handling

C++ File Handling C++ Writing to file C++ Reading file C++ Close file

Miscellaneous

C Vs C++ C++ Comments C++ Data Abstraction C++ Identifier C++ Memory Management C++ Storage Classes C++ Void Pointer C++ Array To Function C++ Expressions C++ Features C++ Interfaces C++ Encapsulation std::min in C++ External merge sort in C++ Remove duplicates from sorted array in C++ Precision of floating point numbers Using these functions floor(), ceil(), trunc(), round() and setprecision() in C++ C++ References C++ Friend Functions C++ Mutable keyword Unary Operators in C++ Initialize Array of objects with parameterized constructors in C++ Differences between #define & const in C/C++ C++ Program to Implement Shell Sort C++ Program to Implement Merge Sort Storage Classes in C Vector resize() in C++ Passing by Reference Vs. Passing by the pointer in C++ Free vs delete() in C++ goto statement in C and C++ C++ program to read string using cin.getline() C++ String Concatenation Heap Sort in C++ Swap numbers in C++ Input Iterators in C++ Fibonacci Series in C++ C ++ Program: Alphabet Triangle and Number Triangle C++ Program: Matrix Multiplication C++ Program to Print Fibonacci Triangle Stack in C++ Maps in C++ Queue in C++ C++ Bitset C++ Algorithms Priority Queue in C++ C++ Multimap C++ Deque Function Pointer in C++ Sizeof() Operators in C++ C++ array of Pointers free() Vs delete in C Timsort Implementation Using C++ CPP Templates C++ Aggregation C++ Enumeration C++ Math Functions C++ Object Class C++ Queue Initialize Vector in C++ Vector in C++ C++ STL Components Function overloading in C++ C++ Maximum Index Problem C++ find missing in the second array C++ Program to find the product array puzzle C++ Program To Find Largest Subarray With 0 Sum C++ Program To Move All Zeros To The End Of The Array C++ Program to find the element that occurs once C++ Program to find the largest number formed from an array Constructor Vs Destructor C++ Namespaces C++ OOPs Concept C++ Static C++ Structs C++ Try-Catch C++ User Defined Exceptions C++ Virtual Destructor C++ vs C# Malloc() and new in C++ Palindrome Number Program in C++ Snake Code in C++ Splitting a string in C++ Structure Vs Class in C++ Virtual Function Vs Pure Virtual Function C++ Bidirectional Iterators C++ Forward Iterators C++ Iterators C++ Output Iterators C++ Range-based For Loop Converting string into integer in C++ LCM Program in C++ Type conversion in C++ Add two numbers using the function in C++ Advantage and disadvantage friend function C++ Armstrong Number Program in C++ ATM machine program in C++ using functions Binary to Decimal in C++ Bit Manipulation in C++ C++ Constructor C++ Dijkstra Algorithm Using the Priority Queue C++ int into String C++ Signal Handling Decimal to Binary in C++ Decimal to Hexadecimal in C++ Decimal to Octal in C++ Factorial Program in C++ Function in C++ Hexadecimal to Decimal in C++ Octal to Decimal in C++ Reverse a Number in C++ Structure Vs Class in C++ C++ Forward Iterators C++ Output Iterators C++ Prime number program Char Array to String in C++ Constructor Overloading in C++ Default arguments in C++ Different Ways to Compare Strings in C++ Dynamic Binding in C++ Program to convert infix to postfix expression in C++ SET Data Structure in C++ Upcasting and Downcasting in C++ Reverse an Array in C++ Fast Input and Output in C++ Delete Operator in C++ Copy elision in C++ C++ Date and Time C++ Bitwise XOR Operator Array of sets in C++ Binary Operator Overloading in C++ Binary Search in C++ Implementing the sets without C++ STL containers Scope Resolution Operator in C++ Smart pointers in C++ Types of polymorphism in C++ Exception Handling in C++ vs Java Const Keyword in C++ Type Casting in C++ Static keyword in C++ vs Java Inheritance in C++ vs Java How to concatenate two strings in C++ Programs to Print Pyramid Patterns in C++ swap() function in C++ Structure of C++ Program Stringstream in C++ and its applications rand() and srand() in C / C++ C++ Ternary Operator C++ Scope of Variables While Loop Examples in C++ Star pattern in C++ using For Loops For Loop Examples in C++ Do-While Loop Examples in C++ Top 5 IDEs for C++ That You Should Try Once Assertions in C/C++ C++ Convert Int to String Continue in C++ While loop Diamond Pattern in C++ using For Loop How to Reverse a String in C++ using Do-While Loop How to Reverse a String in C++ using For Loop How to Reverse a String in C++ using While Loop Infinite loop in C++ Loops in C++ Returning Multiple Values from a Function using Tuple and Pair in C++ wcscpy(), wcslen(), wcscmp() Functions in C++

Unary Operators in C++

Unary operators in C++

Unary operator: is operations that function to produce a new value on a single operand.

a) unary minus: A minus operator modifies the argument's symbol. A positive number becomes negative, so it becomes a positive negative number.

int x = 15;
int y = -x;  // y = -15

Unary minus is dissimilar from decrement operator since two operands are required for subtraction.

b) Increment: It's being used to raise the variable value by 1. The raise can be done in two different ways

prefix increment

The operator precedes the operand by this method (+ + a). Until it is was using the operand value would be altered.

int x = 4;
int y = ++x;  // y = 8

postfix increment

The operator follows the operand in this procedure (a + +). After it has been were using the value operand will be changed.

int x = 2;
 int y = x++;   // y = 2
 int z = x;     // z = 4

c) decrement

It's being used to decrease the variable value by 1. The rise can be affected in 2 directions

prefix decrement

The operator precedes the substring in this technique (– -a). Until it has been was using, the operand value would be altered.

  int x = 2;
  int y = --x;  // y = 1

posfix decrement

The operator tends to follow the iterator in that method ( a--). Once it's been included, the operand value is modified.

int x = 1;
 int y = x--;   // y = 1
 int z = x;     // z = 0

C++ program for Prefix and Postfix combination operations:

// C++ program to demonstrate working of unary increment
// and decrement operators
#include <iostream>
using namespace std;
int main()
{
          // Post increment
          int x = 2;
          cout << "x value: " << x << endl;
          int y = x++;
          cout << "y value after x++ : " << y << endl;
          cout << "x value after x++ : " << x << endl;
          // Pre increment
          x = 2;
          cout << "x value:" << x << endl;
          y = ++x;
          cout << "y value after ++x : " << y << endl;
          cout << "x value after ++x : "<< x << endl;
          // Post decrement
          x = 7;
          cout << "x value before decrement: " << x << endl;
          y = x--;
          cout << "y value after x-- : " << y << endl;
          cout << "x value after x-- : " << x << endl;
          // Pre decrement
          x = 7;
          cout << "x value: "<< x<<endl;
          y = --x;
          cout << "y value after --x : " << y << endl;
          cout << "x value after --x : " << x << endl;
          return 0;
}

Output:

Unary operators in C++

d) NOT(!): This is used to change its operand 's logical condition. If a statement is fulfilled, therefore the operator Logical NOT will make it not true.

If y is true, then !y is false
If y is false, then !y is true

e) Addressof operator(&): This provides a variable url. It serves to revert back a variable's memory location. Such addresses returned by the operator's address are recognized as reference points because they "point" in memory to the factor.

& gives an address on variable n
int x;
int *ptr;
ptr = &x;

f) sizeof(): That operator produces its operand length, in bytes. The operator's length every time invokes its operand. An expression is an operand, or it may be a cast.

#include <iostream>
using namespace std;
int main()
{
   float m = 0;
   cout << "Volume of m: " << sizeof(m);
   return 1;
}

Output:

Unary operators in C++



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