 Program for Sum the digits of a given number, A creative C++ program to Zoom digits of an integer, Programming puzzle (Assign value without any control statement), Programs for printing pyramid patterns in C++, Swap two variables in one line in C/C++, Python, PHP and Java, Commonly Asked C++ Interview Questions | Set 1, Commonly Asked OOP Interview Questions | Set 1, Sorting 2D Vector in C++ | Set 3 (By number of columns), Sorting Vector of Pairs in C++ | Set 2 (Sort in descending order by first and second), Sorting 2D Vector in C++ | Set 2 (In descending order by row and column), vector::push_back() and vector::pop_back() in C++ STL, vector::empty() and vector::size() in C++ STL, vector::front() and vector::back() in C++ STL, Initialize a vector in C++ (5 different ways), Sorting 2D Vector in C++ | Set 1 (By row and column), Sorting Vector of Pairs in C++ | Set 1 (Sort by first and second), List in C++ | Set 2 (Some Useful Functions), Forward List in C++ | Set 1 (Introduction and Important Functions), Forward List in C++ | Set 2 (Manipulating Functions), list::remove() and list::remove_if() in C++ STL, forward_list::front() and forward_list::empty() in C++ STL, list::empty() and list::size() in C++ STL, list::front() and list::back() in C++ STL, list::pop_front() and list::pop_back() in C++ STL, list::push_front() and list::push_back() in C++ STL, Count number of unique Triangles using STL | Set 1 (Using set), std::istream_iterator and std::ostream_iterator in C++ STL. Functions that cannot be overloaded in C++, Copy constructor vs assignment operator in C++. Can we use function on left side of an expression in C and C++? C++ Internals | Default Constructors | Set 1. When should we write our own copy constructor? What is Array Decay in C++? This work is licensed under Creative Common Attribution-ShareAlike 4.0 International

Some interesting facts about static member functions in C++. We dont have to write 3 sum functions, only one function works by using default values for 3rd and 4th arguments. Can a C++ class have an object of self type? Code to generate the map of India (with explanation), Conditionally assign a value without using conditional and arithmetic operators, Set a variable without using Arithmetic, Relational or Conditional Operator. What are the operators that can be and cannot be overloaded in C++? How to restrict dynamic allocation of objects in C++? What happens when more restrictive access is given to a derived class method in C++?

How to print GeeksforGeeks with empty main() in C, C++ and Java? What happen when we exceed valid range of built-in data types in C++? Print a number 100 times without using loop, recursion and macro expansion in C? What all is inherited from parent class in C++? Scope Resolution Operator Versus this pointer in C++? When should we write our own assignment operator in C++? For example, calling of function sum(10, 15, 25, 30) overwrites the value of z and w to 25 and 30 respectively. const_cast in C++ | Type Casting operators, Array of Strings in C++ (3 Different Ways to Create), Counts of distinct consecutive sub-string of length two using C++ STL, Converting string to number and vice-versa in C++. Why copy constructor argument should be const in C++? Print 1 to 100 in C++, without loop and recursion. Therefore, the default value is used for w only. Different methods to reverse a string in C/C++, C++ String Class and its Applications | Set 2. Does C++ compiler create default constructor when we write our own? Virtual Functions and Runtime Polymorphism in C++ | Set 1 (Introduction). Is it possible to call constructor and destructor explicitly? Once default value is used for an argument in function definition, all subsequent arguments to it must have default value. Why is the size of an empty class not zero in C++? Write a program that produces different results in C and C++, Type difference of character literals in C and C++, Difference between C structures and C++ structures, Problem with scanf() when there is fgets()/gets()/scanf() after it. This article is attributed to GeeksforGeeks.org. By using our site, you consent to our Cookies Policy. Default arguments are different from constant arguments as constant arguments cant be changed whereas default arguments can be overwritten if required. isspace() in C/C++ and its application to count whitespace characters, std::stol() and std::stoll() functions in C++, strchr() function in C++ and its applications. Decision Making in C / C++ (if , if..else, Nested if, if-else-if ), Execute both if and else statements in C/C++ simultaneously, How to compile 32-bit program on 64-bit gcc in C and C++, Write a C program that wont compile in C++. How to print size of array parameter in C++? How to make a C++ class whose objects can only be dynamically allocated? How can it be prevented? How to change the output of printf() in main() ? Can we access private data members of a class without using a member or a friend function? Can we access global variable if there is a local variable with same name? For example, the following function definition is invalid as subsequent argument of default variable z is not default. scanf() and fscanf() in C Simple Yet Poweful, Using return value of cin to take unknown number of inputs in C++. Merge operations using STL in C++ | merge(), includes(), set_union(), set_intersection(), set_difference(), ., inplace_merge, Ratio Manipulations in C++ | Set 1 (Arithmetic), Ratio Manipulations in C++ | Set 2 (Comparison), numeric header in C++ STL | Set 1 (accumulate() and partial_sum()), numeric header in C++ STL | Set 2 (adjacent_difference(), inner_product() and iota()), std::regex_match, std::regex_replace() | Regex (Regular Expression) In C++, C Program to display hostname and IP address, Preventing Object Copy in C++ (3 Different Ways), Writing C/C++ code efficiently in Competitive programming, Array algorithms in C++ STL (all_of, any_of, none_of, copy_n and iota), getchar_unlocked() faster input in C/C++ for Competitive Programming, Middle of three using minimum comparisons, Check for integer overflow on multiplication, Generating Test Cases (generate() and generate_n() in C++). How to use getline() in C++ when there are blank lines in input? When do we pass arguments by reference or pointer? Following is a simple C++ example to demonstrate the use of default arguments. How to split a string in C/C++, Python and Java? It can also be stated as default arguments are assigned from right to left. Can references refer to invalid location in C++? new and delete operators in C++ for dynamic memory, Basic Concepts of Object Oriented Programming using C++. Therefore, sum(10, 15, 25) will assign 10, 15 and 25 to x, y, and z. How to create a dynamic 2D array inside a class in C++ ? Hiding of all overloaded methods with same name in base class, Creative Common Attribution-ShareAlike 4.0 International. std::tuple, std::pair | Returning multiple values from a function using Tuple and Pair in C++, atol(), atoll() and atof() functions in C/C++, quick_exit() function in C++ with Examples, Pointers in C and C++ | Set 1 (Introduction, Arithmetic and Array). Can we call an undeclared function in C++? How does void * differ in C and C++? When does compiler create default and copy constructors in C++? We use cookies to provide and improve our services. Why strcpy and strncpy are not safe to use? Default arguments are overwritten when calling function provides values for them. Default Assignment Operator and References, Overloading stream insertion (<>) operators in C++, Overloading Subscript or array index operator [] in C++, Pure Virtual Functions and Abstract Classes in C++, Exception handling and object destruction | Set 1, namespace in C++ | Set 2 (Extending namespace and Unnamed namespace), Namespace in C++ | Set 3 (Accessing, creating header, nesting and aliasing), Inline namespaces and usage of the using directive inside namespaces, Sort in C++ Standard Template Library (STL), Binary Search in C++ Standard Template Library (STL), Pair in C++ Standard Template Library (STL), List in C++ Standard Template Library (STL), Deque in C++ Standard Template Library (STL), deque::empty() and deque::size() in C++ STL, deque::front() and deque::back() in C++ STL, deque::clear() and deque::erase() in C++ STL, queue::front() and queue::back() in C++ STL, queue::push() and queue::pop() in C++ STL, queue::empty() and queue::size() in C++ STL, Priority Queue in C++ Standard Template Library (STL), forward_list::push_front() and forward_list::pop_front() in C++ STL, stack empty() and stack size() in C++ STL, Set in C++ Standard Template Library (STL), std::next_permutation and prev_permutation in C++, Difference between set, multiset, unordered_set, unordered_multiset, Check if a key is present in a C++ map or unordered_map, bucket_count and bucket_size in unordered_map in C++, set_symmetric_difference in C++ with Examples, Multiset in C++ Standard Template Library (STL), Map in C++ Standard Template Library (STL), Heap in C++ STL | make_heap(), push_heap(), pop_heap(), sort_heap(), is_heap, is_heap_until(), Type Inference in C++ (auto and decltype), std::transform() in C++ STL (Perform an operation on all elements), Implementing Iterator pattern of a single Linked List, Binary Search functions in C++ STL (binary_search, lower_bound and upper_bound), Descending order in Map and Multimap of C++ STL, unordered_set get_allocator() in C++ STL with Examples, Multimap in C++ Standard Template Library (STL), multimap::begin() and multimap::end() in C++ STL, multimap::cbegin() and multimap::cend() in C++ STL, map cbegin() and cend() function in C++ STL, multimap::crbegin() and multimap::crend() in C++ STL, multimap lower_bound() function in C++ STL, multimap upper_bound() function in C++ STL, C program to demonstrate fork() and pipe(), Inbuilt library functions for user Input | scanf, fscanf, sscanf, scanf_s, fscanf_s, sscanf_s, C++ Floating Point Manipulation (fmod(), remainder(), remquo() in cmath), iscntrl() in C++ and its application to find control characters, fesetround() and fegetround() in C++ and their application, std::gslice | Valarray generalized slice selector, std::setbase, std::setw , std::setfill in C++, Set position with seekg() in C++ language file handling, Precision of floating point numbers in C++ (floor(), ceil(), trunc(), round() and setprecision()). A default argument is a value provided in a function declaration that is automatically assigned by the compiler if the caller of the function doesnt provide a value for the argument with a default value. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. Is it fine to write void main() or main() in C/C++? NaN in C++ What is it and how to check for it? How to find size of array in C/C++ without using sizeof ? Lexicographically next permutation in C++. and is attributed to GeeksforGeeks.org, Writing first C++ program : Hello World example. auto_ptr, unique_ptr, shared_ptr and weak_ptr, Passing by pointer Vs Passing by Reference in C++. During calling of function, arguments from calling function to called function are copied from left to right.
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