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Programming Articles
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Top Reasons to Learn C++
Here we will see some good reasons behind taking the language C++ as our favorite programming language. We know that C++ is one of the most popular object oriented programming language. These are the reasons behind taking the C++ into consideration.C++ Popularity and High salary −C++ is one of the most popular language in the world. It is used nearly 4.4 million developers worldwide. The C++ developers hold highest paying jobs in the industry with an average base pay of $100000 per year.C++ has abundant library supportv −C++ has Standard Template Library (STL). This helps to write code compactly and ...
Read MorePrint all ways to break a string in bracket form in C++
In this problem, we are given a string and we have to break it into substrings and print them enclosing brackets.Let’s take a few examples to understand the problem better, Input : wxyz Output : (w) (x) (y) (z) (w) (x) (yz) (w) (xy) (z) (w) (xyz) (wx) (y) (z) (wx) (yz) (wxy) (z) (wxyz)Explanation − We will break the string into all possible substrings. And enclose each substring with brackets.Now, since we have understood the problem, let’s create a solution to the problem.Here, we will use recursion to solve the problem. ...
Read MorePrint BST keys in the given range in C++
In this problem, we are given two nodes of a binary search tree. And we have to print all the values in the range of k1 to k2 that occur in the tree. That is we have to print all the values that are greater than k1 and smaller than k2. And we have to print all these keys in increasing order of their values.Binary Search Tree is a tree which follows these 3 properties −The left subtree has nodes with values lesser than the node’s value.The right subtree has a node with values greater than the node’s value.A subtree’s ...
Read MorePrint common nodes on path from root (or common ancestors) in C++
In this problem, we are given a binary tree and two nodes of the binary tree are defined. And we have to print all the common ancestors of the node i.e. common nodes that occur in the path from traversal from root to the node.Binary Tree is a special tree whose every node has at max two child nodes. So, every node is either a leaf node or has one or two child nodes.Example, Ancestor node is a node that is connected to lower-level nodes in a tree.The common ancestor node of two nodes is a node that is an ...
Read MorePrint cousins of a given node in Binary Treein C++
Binary Tree is a special tree whose every node has at max two child nodes. So, every node is either a leaf node or has one or two child nodes.Example, In this problem, we are given a binary tree and we have a node of the tree and we have to find the cousin nodes of the node. No sibling nodes are to be printed for the binary tree.Let’s take an example, For the above binary tree, the cousin node is 5.To make the concept more clear let’s describe cousin node. In a binary tree, two nodes are said to ...
Read Moreafter method in Python Tkinter
Tkinter is a python library to make GUIs. It has many built in methods to create and manipulate GUI windows and other widgets to show the data and GUI events. In this article we will see how the after method is used in a Tkinter GUI.Syntax.after(delay, FuncName=FuncName) This method calls the function FuncName after the given delay in milisecondDisplaying WidgetHere we make a frame to display a list of words randomly. We use the random library along with the after method to call a function displaying a given list of text in a random manner.Exampleimport random from tkinter import * ...
Read MoreChange data type of given numpy array in Python
We have a method called astype(data_type) to change the data type of a numpy array. If we have a numpy array of type float64, then we can change it to int32 by giving the data type to the astype() method of numpy array.We can check the type of numpy array using the dtype class. Let's check the data type of sample numpy array.Example# importing numpy library import numpy as np # creating numpy array array = np.array([1, 2, 3, 4, 5]) # printing the data type of the numpy array print(array.dtype)OutputIf you run the above code, you will get the ...
Read MoreProgram to print last N lines in c++
In this tutorial, we will be discussing a program to print the last N lines.For this, we will be provided with a string that consists of the new line character to denote the start of the next line and the number of lines to be printed from the last. Our task is to start from the last and print all the N lines counting from the last.Example#include using namespace std; #define DELIM '' //printing the last N lines void print_last_lines(char *str, int n){ if (n
Read MoreMaximum average sum partition of an array in C++
Problem statementGiven an array, we partition a row of numbers A into at most K adjacent (non-empty) groups, then the score is the sum of the average of each group. What is the maximum score that can be scored?ExampleIf input array is {9, 2, 5, 3, 10} then we can partition array as follows −{9} {2, 5, 3} and {10} then average sum of this is −9 + (2 + 5 + 3)/ 3 + 10 = 22.33AlgorithmWe can use memorization technique to solve this problem −Let memo[i][k] be the best score portioning A[i to n-1] into at most K ...
Read MoreMaximum and Minimum in a square matrix in C++
Problem statementGiven a square matrix of order n*n, find the maximum and minimum from the matrixExampleIf given matrix is −{{15, 17, 19}, {5, 1, 7}, {14, 5, 16}} then Minimum number is 1 and maximum number is 19AlgorithmSelect two elements from the matrix one from the start of a row of the matrix another from the end of the same row of the matrixCompare them and next compare smaller of them to the minimum of the matrix and larger of them to the maximum of the matrix.We can see that for two elements we need 3 compare so for traversing ...
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