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C Articles
Found 953 articles
C/C++ Program to Count number of binary strings without consecutive 1’s?
In this article, we will learn how to count all distinct binary strings of length n such that no two 1's appear consecutively. We'll explore this problem using both recursive and dynamic programming approaches in C and C++. What is a Binary String? A binary string is a sequence of characters that contains only '0' and '1'. It represents information in base-2 format. For example, "0101" is a binary string of length 4. We are given a positive integer n, and our task is to count all possible distinct binary strings of length n that do not contain ...
Read MoreAlternate vowel and consonant string in C/C++?
We are given a string with both vowels and consonants. Our task is to rearrange it so that vowels and consonants appear alternately, while keeping their original order within their groups. This rearrangement is only possible if the number of vowels and consonants is equal, or their difference is exactly one. If multiple valid arrangements are possible, we return the one that is lexicographically smaller. Let's understand this with a few example scenarios. Scenario 1 Input: "objective" Output: "bojecitev" Explanation: Vowels = [o, e, i, e], Consonants = [b, j, c, t, v] Consonants are more by 1 -> valid ...
Read MoreC/C++ Program for Finding the Number Occurring Odd Number of Times?
In this article, we implement a C++ program to find the number that occurs an odd number of times in an array, using different approaches. We are given an array containing multiple elements, and our task is to identify the number that appears an odd number of times. For example, consider the array: [1, 2, 1, 3, 3, 2, 2]. In this case, the number 2 appears 3 times, which is odd. Example Scenarios Let's look at a few example scenarios to understand the problem: Input: arr[] = {5, 7, 8, 8, 5, 8, 8, 7, 7} ...
Read MoreWhat does the operation c=a+++b mean in C/C++?
In C/C++, the expression c = a++ + b indicates that the current value of a is added to b, and the result is assigned to c. After this assignment, a is incremented by 1 (post-increment), which means the increment of a happens after its value is used in the expression. Well, let a and b initialize with 2 and 5, respectively. This expression can be taken as two different types. c = (a++) + b c = a + (++b) The above two expressions contain both post and pre-increment ...
Read MoreAngle between two Planes in 3D in C Program?
In 3D geometry, planes are flat surfaces extending infinitely in space. When two planes intersect, they form a line, and the angle between them becomes an important geometric measure. In this article, we will learn how to calculate the angle between two planes in 3D space using a C program. The diagram below illustrates two planes intersecting in 3D space. These planes can be represented by the following equations: Equation P1: a1 * x + b1 * y + c1 * z + d1 = 0 P2: a2 * x + b2 * y + c2 * ...
Read MoreAccessing array out of bounds in C/C++
An array in C/C++ is a fixed-size sequential collection of elements of the same data type where all the elements are stored in the contiguous memory allocation. If an array is accessed out of bounds then an undefined behavior will occur in C/C++, unlike Java where an exception such as java.lang.ArrayIndexOutOfBoundsException will occur. Accessing Out of Bound Memory Accessing out-of-bounds memory in an array means we are trying to access the array index outside its valid range size (i.e., index = array size). It returns any garbage value in the output. Example In ...
Read MoreAdd 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 MoreArray Manipulation and Sum using C/C++
In this problem, you are given an integer array arr of size n and an integer S. Your task is to find an element k in the array such that if all the elements greater than k in the array are replaced with k, then the sum of all the elements of the resultant array becomes equal to S. If such an element exists, print it; otherwise, print -1. Scenario 1: Input: int S = 9; int arr[] = { 1, 3, 2, 5, 8 }; Output: ...
Read MoreA C Puzzle in C Programming?
C programming puzzles are small but tricky coding problems, which are designed to challenge and to understand the C programming language in a better way. Problem Statement We are given two numbers, and our task is to combine them in such a way that the second integer is placed before the first integer, resulting in a single combined integer. But here, we are not allowed to use any logical, arithmetic, string-related operations, or any pre-defined functions. Consider the following input/output scenarios to understand the puzzle statement better: Scenario 1 Input: 12, 54 Output: 5412 Explanation: Here, the second ...
Read MoreAddress of a function in C or C++
In C and C++, every function is stored in the computer's memory, and each function has a memory address just like all other variables. In this article, our task is to see how we can access the address of a function and display it in both C and C++. Accessing Address of a Function To access the address of a function, we simply use its name without parentheses. When we print a function name with parentheses like hello(), we're calling the function. But if we print just hello, it gives us the memory address where the function is stored. ...
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