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Technical articles with clear explanations and examples
Array algorithms in C++ STL
The C++ STL or Standard Template Library is a collection of general-purpose classes and functions with templates for implementing many algorithms and data structures such as vectors, lists, queues, and stacks. The 4 components of STL are: Containers, Algorithms, Iterators, and Functors. In this article, we will discuss the functions of the header that work on arrays, and are introduced in C++ 11 and later versions. C++ Header The algorithm header provides various built-in functions that implement algorithms such as searching, sorting, finding the maximum element, etc. These functions perform various operations on containers such ...
Read MoreArranging Coins in C++
In this problem, we have n number of coins. To arrange these coins in a staircase shape such that each row consists of k number of coins, where k is the row number in which the coins are placed. The last row may or may not be completely filled. Our task is to find the number of completely filled rows. Here is a scenario of arranging coins problem: Scenario Input: n = 8 Output: 3 Explanation: In the above figure, we can see there are 3 completely filled rows and the ...
Read MoreCheck if a number is a Pythagorean Prime or not in C++
The Pythagorean primes are prime numbers that can be represented in the form 4n + 1, where n is a non-negative integer. These primes have a special property as they can be expressed as the sum of two square numbers. In other words, a prime number p is called a Pythagorean prime if: p is prime, and p ≡ 1 (mod 4), i.e., when divided by 4, it leaves a remainder of 1. For example: 5 = 4x1 + 1 = 22 + ...
Read MoreAre array members deeply copied in C++?
In C++, an array member is simply the individual elements stored within an array. What is Deep Copy? A deep copy creates a new object and allocates separate memory for the dynamically allocated resources; it copies all the data members of the original object into the new object. So that the new object is completely independent of the original. When a class has a pointer to dynamic memory, the default copy constructor and assignment operator will perform a shallow copy, which is a copy of the pointer rather than the data. So, must define our own ...
Read More2D vector in C++ with user defined size
In this article, we will see how we create and use 2D vectors with user-defined sizes. What is 2D Vector? In C++, a vector is a dynamic array used to store elements. The 2D vector is a vector of vectors and are used to create a dynamic two-dimensional array where the number of rows and the number of columns in each row can vary. Just like a 2D array, a 2D vector is used to store data in a tabular form such as matrices, grids, or tables. Structure of a 2D Vector A 2D vector is declared as: vector v; ...
Read MoreMaximum triplet sum in array in C++
In this article, we are given an array of integers. Our task is to write a program to calculate the maximum triplet sum in the given array, i.e., find the set of three elements whose sum is maximum. Input Output Scenario Consider the following input and output scenario where we have calculated the sum of each triplet and then returned the maximum sum of the triplet in the array: Input: arr = {4, 6, 1, 2} Output: Maximum triplet sum: 12 Here is an explanation of the above example: All ...
Read MoreCheck if a number is Quartan Prime or not in C++
The Quartan primes are prime numbers that can be represented as x^4 + y^4. Where x, y > 0. Some Quartan prime numbers are {2, 17, 97, …}.In this article, we will learn how to check whether a number is Quartan Prime or not in C++. Consider the following input and output scenarios to understand the concept better: Scenario 1 Input: 17 Output: The number is Quartan Prime Explanation Here, we can represent the given number in the form of x^4 + y^4; (1)^4 + (2)^4 => 1 + 16 = 17. Scenario 2 Input: 12 Output: The number ...
Read MoreCheck if a given matrix is Hankel or not in C++
The Hankel matrix is a square matrix, in which each ascending skew-diagonal or anti-diagonal (from top-right to bottom-left) elements are constant. For example a matrix name M with size 5x5 is given below − 1 2 3 4 ...
Read MoreProgram to add two binary strings in C++
In this problem, we are given two binary strings, and we need to find their sum and return the result as a binary string. A binary string is a string that contains only the characters '0' and '1', where 0 and 1 are binary numbers. While adding two binary numbers, we follow the binary addition rules given below - 1 + 0 = 1 0 + 1 = 1 0 + 0 = 0 1 + 1 = 0 with a carry of 1 ...
Read MoreAdvantages of vector over array in C++
In C++, both arrays and vectors are used to store elements, but the main difference is that arrays have a fixed size and cannot be changed once initialized. Whereas, vectors are dynamic, i., e we can change their size during runtime. In this article, we'll look at the advantages of using vectors over arrays in C++. Here's how we declare an array and a vector in C++: // Declaring an array int arr[5]; // Fixed-size array of 5 integers // Declaring a vector #include std::vector vec; // Dynamic vector of integers Advantages of ...
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