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C++ Articles
Page 306 of 597
Array Transformation in C++
Array transformation is a popular coding question asked in technical assessments and interviews. In this article, we will discuss the problem of array transformation with example testcases, the algorithm to solve it, and provide a C/C++ implementation. Array Transformation Based on Local Maxima and Minima In this problem, you are given an array of integers arr[] of size N. Every day the array undergoes a transformation which can be defined as follows: The first and last elements of the array are not transformed. For every other element arr[i] in the array, where 0 < i < N-1, ...
Read MoreAdd Bold Tag in String in C++
A string is a sequence of characters, like words, numbers, or sentences, enclosed in double quotes ("). The given task is to add a closed pair of HTML bold tags around a string using C++.Let us understand this with an example: Input: abc Output: abc Add Bold Tag in String in C++ To add bold tags to a string in C++, we use string concatenation. This is the process of joining two or more strings together to form a new string. In C++, this can be done using the '+' operator. To wrap a string with bold ...
Read MoreAdd two numbers using ++ operator in C++.
Adding two numbers is a basic arithmetic operation, where we simply combine their values to get the total. The given task is to add two numbers using the "++" operator in C++. Let's understand this with an example: Scenario 1 // Adding two numbers using '+' operator Input: a = 7, b = 3 Output: 10 Explanation: a + b => 7 + 3 = 10 Scenario 2 // Adding two numbers using '++' operator Input: a = 7, b = 3 Output: 10 Explanation: a + b => 7 + 1 + ...
Read MoreArray 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 ...
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