C++ Tutorial

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C++ Control Statement

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C++ STL Tutorial

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C++ Programs

C++Programs Fibonacci Series Prime Number Palindrome Number Factorial Armstrong Number Sum of digits Reverse Number Swap Number Matrix Multiplication Decimal to Binary Number in Characters Alphabet Triangle Number Triangle Fibonacci Triangle Char array to string in C++ Calculator Program in C++ Program to convert infix to postfix expression in C++ using the Stack Data Structure C++ program to merge two unsorted arrays C++ coin change program C++ program to add two complex numbers using class C++ program to find the GCD of two numbers C++ program to find greatest of four numbers Delete Operator in C++ How to concatenate two strings in c++ Upcasting and Downcasting in C++ C++ Dijkstra Algorithm using the priority queue Constructor overloading in C++ Default arguments in C++ Dynamic binding in C++ Dynamic memory allocation in C++ Fast input and output in C++ Hierarchical inheritance in C++ Hybrid inheritance in C++ Multiple Inheritance in C++ C++ Bitwise XOR Operator Different Ways to 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Credit Card Validator in C++ Hotel Management in C++ Pacman Game in C++ Billing Management System in C++ 4-Dimensional Array in C/C++ accumulate() and partial_sum() in C++ STL : Numeric header Arrays of Vectors in C++ STL Catching Base and Derived Classes as Exceptions in C++ and Java Forward List in C++ Manipulating Functions Assertions in C/C++ List back() function in C++ STL Type Inference in C++ (auto and decltype) Attributes in C++ BigInt (Big Integers) in C++ with Examples 2D Vector in C++ with User Defined Size Declare a C/C++ Function Returning Pointer to Array of Integer Pointers Jump Statements in C++ Maximum Number of Edges to be Added to a Tree so that it stays a Bipartite Graph Modulus of two Float or Double Numbers Top 10 C++ Project Ideas for Beginners C++ Class Member Functions C++ Program for Find k pairs with Smallest Sums in Two Arrays Check if bits in Range L to R of Two Numbers are Complement of Each other or Not University Management System in C++ Advantage and Disadvantage Friend Function C++ C++ Pre-processors Difference between Circular Queue and Priority Queue forward_list::cbefore_begin() in C++ STL Heap in C++ STL | make_heap(), push_heap(),pop_heap(), sort_heap(), is_heap, is_heap_until() How does 'void*' differ in C and C++ Initialise an Array of objects with Parameterised Constructors in C++ list::push_front() and list::push_back() in C++ STL Maximize the Cost of Repeated Removal of String P or its Reverse from the String S Canteen Management System in C++ Declare a C/C++ Function Returning Pointer to Array of Integer Pointers Name Mangling and Extern C in C++ Different Compilers for C++ Diamond Problem in C++ Function Prototype in C++ Generic Programming in C++ School Fee Enquiry System in C++ Vector Pair in C++ What is a Token in C++ What is include iostream in C++ C++ 'Using' vs 'Typedef' Execute both if and else Statements in C/C++ Simultaneously How to Compile 32-bit Program on 64-bit GCC in C and C++ How to Create and Use ''unique_ptr'' Instances Level Order Traversal in Spiral form Problem with scanf() when there is fgets()/gets()/scanf() After it BFS Code in C++ Create Linked List In C++ Function Overloading in C++ std::minmax() and std::minmax_element() in C++ STL multimap::emplace_hint() Function in C++ STL Multimap find() in C++ STL Multiple Comparisons in a C++ Priority Queue Name Mangling and Extern C in C++ Concept Parameterised Constructor in C++ Remove Duplicates from Sorted Array in C++ Returning Multiple Values from a Function using Tuple and Pair in C++ Scope Resolution Operator vs this Pointer Set a variable without using Arithmetic, Relational or Conditional Operator C++ Program To Sort An Array In Descending Order Timsort Implementation Using C++ What Happens When We Exceed Valid Range of Built-in Data Types in C++ Naked Function Calls in C++ What is operator overloading in C++ Simple Car Racing Game Code in C++ SJF CPU Scheduling Program in C++ Virtual functions and runtime polymorphism 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Actual Parameter and Formal Parameter in C++ Adding Two Strings in C++ Adding Vectors in C++ How To Convert a Qstring to Hexadecimal in C++ PAIR IN C++ C++ Program to Count Positive and Negative Numbers in an Array Department Store Management System (DSMS) using C+ Print all Substrings of a String that has equal number of vowels and consonants in C/C++ Accumulator in C++ Acess Specifiers in C++ Add Two Matrix in C++ Add two Numbers in C++ program Add two Numbers Represented by Linked Lists in C++ Associative Containers in C++ C++ Books for Beginners Dynamic Initialization of Objects in C++ Array sum in c++ stl The distinction between the C++ copy constructor and assignment operator Boost::split in c++ library Difference between Declaration of User Defined Function Inside main() and Outside of main() Isprint() in C++ Std partition point in c++ Opening and Closing a File in C in C++ Pdf Overriding Member Function in C++ Password Validation in C++ PID Controller C++ Best C++ Online Course Unordered Set in C++ Convert Camel Case String in Snake Case in C++ C++ Program to Draw Histogram C++ DSA C++ Flow Control C++ program to group anagrams in the given stream of strings cstdlib in C++ Everything You Need to Know About Conio.h Library Functions in C/C++ Increment and Decrement Operators in C++ How to generate random number between 1 to 10 in C++ How to Manipulate cout Object using C++ IOS Library Sliding Window Algorithm in C++ What is Bottom-up Approach in C++ What is Top-Down Approach in C++ Bitmask in C++ Ordered Map C++ Characteristics of Destructor in C++ Factory Design Pattern C++ REPL C++ AVL Tree in C++ Des in C++ Boost Library in C++ C++ 11 Lambda Expression Concurrency in C++ C++ GUI Static Library Linking in C++ Constexpr in C++ Difference between break and continue in C++ C++ Boolean Encapsulation in C++ OpenGL C++ Sequence Containers in C++ Difference between C++ and rust Falcon C++ Popcount C++ Boost C++ C++ Function Object Boost Library in C++ C++ 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C++ Knapsack Problem in C++ Merge Sort Pseudocode C++ Objective C vs C++ Pointer Hackerrank solution in C++ Reinterpret_cast in c++ Tree Implementation in C++ Custom sort string in C++ Stack functions in C++ Thread Synchronization in C++ Leaders in an array in C++ How to implement Min Heap in C++ C++ program to divide a string into N equal parts Celebrity Problem in C++ Best C++ game engine for beginners Maximum circular subarray sum in C++ Print unique rows in a given Binary matrix in C++ Mutable keywords in C++ Move all zeroes to end of array in C++ Menu-driven program in C++ Reversal algorithm for Array rotation in C++ Sort elements by frequency in C++ Stable Marriage Problem in C++ Boyer Moore Algorithm for Pattern Searching in C++ C++ program for run Length Encoding and Decoding C++ Program to find if a character is a Vowel or Consonant C++ Program to find the number of Islands using DFS Clamp in C++ Diameter of binary tree in C++ Foldable binary tree in C++ Lexicographic rank of a String in C++ Merge overlapping Intervals in C++ Override keyword in C++ Search in a row-wise and column-wise sorted matrix in C++ Set insertion and deletion in C++ std::thread detach in C++ Tug of war in C++ Merge Sort Algorithm in C++ Variadic Templates in C++ Tree isomorphism problem in C++ Thread Safe Queue in C++ Stock span problem in C++ std::tie in C++ Std::back_inserter in C++ Std::allocator() in C++ QuickSort on Singly Linked List in C++ Pancake sorting in C++ Nested Namespace in C++ Largest Rectangular Area in Histogram using Segment Tree in C++ C++ async await C++ Program for Counting Inversions in an Array Hamilton Cycle Detection in C++ Insertion in Splay Tree in C++ kruskal's algorithm in C++ Maximum product subarray in C++ Print all interleavings of given two strings in C++ Aho-Corasick Algorithm for Pattern Searching in C++ An In-Place Algorithm for String Transformation in C++ C++ program for product array puzzle C++ Program to Demonstrate Usage of bind1st Binder C++ Program to Find Determinant of a Matrix Call by address in C++ Chrono in C++ Count Smaller Elements on Right Side in C++ Equilibrium index of an array in C++ flock() function in C++ Power set algorithm in C++ Stack smashing detected in C++ The Great Tree List Recursion Problem in C++ Timer implementation in C++ Tower of Hanoi Algorithm in C++ Linear Search Algorithm in C++ The Fastest Sorting Algorithm in C++ Boundary traversal of binary tree in C++ Box Stacking Problem in C++ C++ flat_map C++ Program to Find Factorial of a Number using Iteration C++ Program To Find Normal and Trace of a Matrix C++ Program to Represent Linear Equations in Matrix Form C++ Program to Swap Rows of Matrix C++ Program to Toggle Cases in a String cuckoo hashing in C++ Draw a circle without floating point arithmetic in C++ Find a sorted subsequence of size 3 in linear time in C++ Finding a Peak Element in an Array in C++ forward_list::splice_after() in C++ Global constant in C++ ios::rdstate() Function in C++ 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Difference between cout and std::cout in C++

In C++, std::cout and cout are the standard output streams associated with the iostream module of the C++ Standard Library. An instance of the ostream class, the cout object is used to output data to the standard output device, which is typically a console or terminal. In this article, you will learn about the difference between cout and std::cout in C++. Here's a more thorough breakdown of the distinctions between std and cout::(cout).

Namespace:

When your C++ program includes the using namespace std; directive at the start, cout is usually used. All of the names from the std namespace, including cout, are brought into the global namespace by this directive. It allows you to use names from the std namespace without prefixing them with std::, simplifying code.

Example:

using namespace std;
int main() {
cout << "JAVA T POINT" << endl;
return 0;
}

When you want to explicitly specify the namespace, you use std::cout. It is regarded as best practice when there is a chance of naming conflicts or with larger programs.

Example:

#include <iostream>
int main() {
std::cout << "JAVA T POINT" << std::endl;
return 0;
}

Namespace Pollution:

Namespace pollution, in which names from the std namespace conflict with names in your code or other libraries, can result from using namespace std;. For this reason, some programmers would rather use the std:: prefix rather than namespace std;.

Best Practices:

Avoid using namespace std; directive that is frequently advised in larger programs or projects to reduce naming conflicts and enhance code readability. It is possible to indicate that you are utilizing C++ Standard Library functionality by explicitly using the std:: prefix.
It is more practical and common to use namespace std in shorter programs or quick examples.

Head-to-Head Comparison between Cout and Std::Cout:

Difference between cout and std::cout in C++

There are several differences between the Cout and Std::Cout in C++. Some main differences between them are as follows:

S.No	cout	std::cout
1.	It is necessary to include a "namespace std" in the program.	If "namespace std" was not previously declared, "std::cout" must be used.
2.	The ostream class has a predefined object called cout.	The Standard Template/Iostream Library is called by "std::cout" because "cout" is only defined in the "std" namespace.
3.	Several functions, including cin, cout, and others, are accessible if the namespace is declared beforehand.	It is only an implicit initialization of the standard library carried out within the function concurrently with the primary calculation.

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