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Articles by Nishu Kumari
Page 3 of 9
Add two unsigned numbers using bits in C++.
In this problem, we are given two unsigned numbers, and we need to add them using bits in C++. Bits are binary digits that can be either 0 or 1. Unsigned numbers are positive numbers represented by these bits. To add two unsigned numbers, we add their bits one by one using binary addition rules. Binary addition works like decimal addition, but with simpler rules: 1 + 0 = 1 0 + 1 = 1 0 + 0 = 0 1 + 1 ...
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 ...
Read MoreAdd Two Numbers II in C++
We're given two singly linked lists, where each node stores one digit of a number. The digits are arranged from left to right, just like how we normally write numbers. For example: 7 -> 2 -> 4 -> 3 represents the number 7243. Our task is to add these two numbers and return the sum as a new linked list in the same (left-to-right) order. The input number can contain zeroes at the start, but in the output, there should not be any leading zeros. Let's understand this with a diagram given below - Scenario 1 Input: List 1 ...
Read MoreHow to check if input is numeric in C++?
Numeric input means a value that contains only digits from 0 to 9, without any letters or special characters. In this article, we'll show you how to write a C++ program to check whether the input is numeric. Let's understand this with a few examples: //Example 1: Input: 12345 Output: Valid numeric input //Example 2: Input: 12a5 Output: Not a numeric input We will cover two common ways to check if the input is numeric or not in C++. Using std::getline with std::isdigit Check Using stringstream to Parse ...
Read MoreHow to find the size of an int[] in C/C++?
In C and C++, arrays can store multiple values of the same data type. This problem is about finding how many elements are present in a statically declared int[] array (not pointers or dynamically allocated arrays). We'll learn how to find the size of an int[] in both C and C++. Let's understand this with an example: //Example 1 input: int numbers[] = {10, 20, 30, 40, 50}; This array has 5 elements. Output: Number of elements: 5 //Example 2: Input: int values[] = {1, 2, 3}; This array has 3 elements. Output: Number of elements: 3 ...
Read MoreC++ Program to Check if a Matrix is Invertible
A matrix is invertible if it has an inverse. An inverse of a matrix exists only when its determinant is non-zero. If the determinant of a matrix is zero, the matrix is called singular and cannot be inverted. In this article, we'll write a C++ program to check if a matrix is invertible using its determinant. To better understand this, let's take the following 3x3 matrix as an example: Given 3*3 Matrix: 4 2 1 2 1 1 9 3 2 To check if this matrix is invertible, we ...
Read MoreC++ Program to Perform LU Decomposition of any Matrix
The LU decomposition of a matrix produces a matrix as a product of its lower triangular matrix and upper triangular matrix. In the lower triangular matrix (L), all values above the main diagonal are zero, and in the upper triangular matrix (U), all values below the main diagonal are zero. In this article, we'll write a C++ program to perform LU decomposition of any matrix. Example Steps to perform LU Decomposition of Matrix LU Decomposition breaks a matrix A into two matrices L (lower triangular) and U (upper triangular) such that: A = L * U We ...
Read MoreConvert an int to ASCII character in C/C++
In C and C++, every character like 'A', 'b', '3', or '@' is stored as a number called its ASCII value. For example, 'A' is 65, and 'a' is 97. Given an integer like 97, we can convert it to its corresponding ASCII character which is 'a'. In this article, we will learn how to write a C and C++ program to convert an integer into its ASCII character. For example, we're given any integer from 0 to 127 (because the ASCII table contains 128 characters), and we need to convert it into its corresponding ASCII character: Input: 65 ...
Read MoreDetermining how many digits there are in an integer in C++
Here we will see how to check how many digits are there in an integer in C++. At first we will see the traditional rule, then a shorter method and finally another approach to find the digit count. For example, given a single integer (which can be positive, negative, or zero): //Example 1 Input: 12345 Output: 5 //Example 2 Input: -789 Output: 3 Note: The minus sign (if present) is not counted as a digit. Determining how many digits there are in an integerWe can count the number of digits in an integer using different methods ...
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