Get Array Length in C++

Get array length in C++.

In this tutorial, you will learn how to get array length in C++. In C++, you can use the size() method to get the array length. Below is the syntax of the size() method: Syntax arrayname.size() Initialize Array in C++ array<int,8> a = { 1, 5, 2, 4, 3, 6, 8, 7 }; Using size() ... Read more

C++ multimap Example

A programmer writing C++ multimap program.

In this tutorial, we will see a C++ multimap example to find a value in a map with duplicate key values. C++ Header Files for multimap Program #include <iostream> #include <map> #include <vector> #include <iterator> #include <algorithm> multimap Initialization in C++ multimap< string, long > contacts = { { "V.Jegan", 2232342323 }, { "R.Meena", 3243435323 ... Read more

Variable Declaration in C++ Example

In C++, you can declare a variable anywhere in the block before you reference it. When the variable's declaration is close to its use, its purpose and behavior can be easier to understand. Below is an example of variable declaration in the C++ program. Example 1: Variable Declaration in C++ #include <iostream> main() { cout ... Read more

10+ Programming Languages FizzBuzz Program Examples

Nowadays, most interviewers ask the candidate to write the FizzBuzz program. So here I am, giving the 10+ programming languages FizzBuzz program examples. These examples will help you learn how to do it in the most popular programming languages. What is FizzBuzz Program? In the FizzBuzz program, you have to write the following logic: For ... Read more

Switching from Pointer to Member Functions in C++

This tutorial shows how to do switch from pointer to member functions in C++ through an example. Example: Pointer to Member functions in C++ Suppose you want to do is a "switch" using a function pointer, but using the method pointers. This can be done using std::invoke from <functional> header in C++ (2017). #include <iostream> #include <functional> ... Read more

How to Print Address of Iterator in C++?

This tutorial shows how to print the address of an iterator in C++. Example: C++ Print Iterator Address #include <iostream> #include <vector> std::ostream &operator<<(std::ostream &os, const std::vector::iterator &i) { os << &i; return os; } int main(int argc, const char *argv[]) { std::vector inputs = {15, 20, 10, 5, 19}; std::vector::iterator i; i = inputs.begin(); ... Read more

macOS Error: DNSSD Crash After Calling fd_set on its Socket in C++

The error "DNSSD Crash After Calling fd_set on its Socket" occurs on macOS because too many file descriptors are open in C++. This can be solved by increasing the rlimit using the following code: Solving - macOS Error: DNSSD Crash After Calling fd_set on its Socket void setup_min_fd(int min_fds) { struct rlimit rlim; if (getrlimit(RLIMIT_NOFILE, ... Read more

Making std::map::find Function Case Sensitive in C++ | Case Sensitive Search Using the map in C++

This C++ tutorial shows how to make the std::map::find function case sensitive. Case Sensitive Search Using the map in C++ Example The below example will look for the "FOX" string in uppercase using the map function and, if found, then will print on the console: #include <iostream> #include <map> using namespace std; int main() { ... Read more