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Articles by Sunidhi Bansal
Page 61 of 81
Set crbegin() and crend() function in C++ STL
In this article we are going to discuss the set::crbegin() and set::crend() functions in C++ STL, their syntax, working and their return values.What is Set in C++ STL?Sets in C++ STL are the containers which must have unique elements in a general order. Sets must have unique elements because the value of the element identifies the element. Once added a value in set container later can’t be modified, although we can still remove or add the values to the set. Sets are used as binary search trees.What is set::crbegin()?crbegin() function is an inbuilt function in C++ STL, which is defined ...
Read Morestrchr() function in C++ and its applications
In this article, we will be discussing the working, syntax, and examples of strchr() function in C++ STL.What is strchr()?strchr() function is an inbuilt function in C++ STL, which is defined in the header file. strchr() function is used to find when the character first occurred in the string. This function returns the pointer to the location where the character first appeared in the string.If the character doesn’t exist in the string the function returns the null pointer.Syntaxchar* strchr( char* str, char charac );ParametersThe function accepts the following parameter(s)−str − It is the string in which we have to ...
Read MoreC++ Program for Derivative of a Polynomial
Given a string containing the polynomial term, the task is to evaluate the derivative of that polynomial.What is a Polynomial?Polynomial comes from two words: - “Poly” which means “many” and “nomial” means “terms”, which comprises many terms. Polynomial expression is an expression containing variables, coefficients and exponents, which only involves operations such as, addition, multiplication and subtraction of variable(s).Example of polynomialx2+x+1Derivative of the polynomial p(x) = mx^n will be −m * n * x^(n-1)ExampleInput: str = "2x^3 +1x^1 + 3x^2" val = 2 Output: 37 Explanation: 6x^2 + 1x^0 + 6x^1 Putting x = 2 6*4 + ...
Read MoreJava Program for credit card number validation
Given a long number containing digits of a credit card number; the task is to find whether the credit card number is valid or not with a program.For checking a credit card is valid or not, the following are the validations we have to be sure for declaring the result.A credit card’s number must have 13 to 16 digits, it must start with the following digits.All the visa cards start from 4 All the master cards start from 537 is the starting for American express cardsAll the discover cards start from 6Steps to check whether the credit card is valid or ...
Read MoreC++ Program for Optimal Page Replacement Algorithm
Given page number and page size; the task is to find number of hits and misses as when we allocate the memory block to a page using Optimal Page Replacement Algorithm.What is Optimal Page Replacement Algorithm?Optimal page replacement algorithm is a page replacement algorithm. A page replacement algorithm is an algorithm which decides which memory page is to be replaced. In Optimal page replacement we replace the page which is not referred to the near future, although it can’t be practically implemented, but this is most optimal and have minimal miss, and is most optimal.Let’s understand by using an example ...
Read MoreC++ Program for Priority Scheduling
We are given with the n number of processes i.e. P1, P2, P3, ......., Pn with their corresponding burst times and priorities associated with each process . The task is to find the average waiting time ,average turnaround time and the sequence of process execution using priority CPU scheduling algorithm.What is Waiting Time and Turnaround Time?Turnaround Time is the time interval between the submission of a process and its completion.Turnaround Time = completion of a process – submission of a processWaiting Time is the difference between turnaround time and burst timeWaiting Time = turnaround time – burst timeWhat is Priority ...
Read MoreC++ Program for Bisection Method
Given with the function f(x) with the numbers a and b where, f(a) * f(b) > 0 and the function f(x) should lie between a and b i.e. f(x) = [a, b]. The task is to find the value of root that lies between interval a and b in function f(x) using bisection method.What is bisection method?Bisection method is used to find the value of a root in the function f(x) within the given limits defined by ‘a’ and ‘b’. The root of the function can be defined as the value a such that f(a) = 0.ExampleQuadratic equation F(x) = ...
Read MoreC++ Program for sorting variables of any data type
We are given with the values of different datatypes like it can be of type integer, float, string, bool, etc. and the task is to sort the variables of any data type using one common method or function and display the result.In C++, we can use std::sort to sort any type of array which is available in C++ standard template library(STL). By default sort function sorts the array element in ascending order. Sort() function takes three arguments −Start element in the array list i.e. from where you want to start your sortEnd element in the array list i.e. till where ...
Read MoreC++ Program for dot product and cross product of two vectors
We are given two vectors let’s say vector A and vector B containing x, y, and directions, and the task is to find the cross product and dot product of the two given vector arrays.What is a vector?In mathematics, a quantity that has a magnitude and a direction is known as a vector whereas a quantity that has only one value as magnitude is known as a scalar. The point from where the vector starts is known as the initial point and the point where the vector ends is known as the terminal point. The distance between the initial point ...
Read MoreC++ Program for Expressionless Face Pattern printing
Given a number n; the task is to create the Expressionless face pattern upto n lines and display the results. Expressionless face is created using special characters, expressionless face using special character seems like: “*_*”.ExampleInput-: n = 6 Output-:Input-: n = 8 Output-: AlgorithmStart Step 1-> In function print_stars(int i) Loop For j = 1 and j In function print_pattern(int rows) Loop For i = 1 and i In function int main() Declare and set rows = 8 Call print_pattern(rows) StopExample#include using namespace std; //function to print stars void print_stars(int i) { for (int j = 1; j
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