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Articles on Trending Technologies
Technical articles with clear explanations and examples
Count all Palindromic Subsequence in a given String in C++
In this tutorial, we will be discussing a program to find the number of all palindromic subsequences in a given string.For this we will be provided with a string. Our task is to find the number of palindromic subsequences that can be made in that given string.Example#include #include using namespace std; //returning total palindromic sequence int count_palin(string str){ int N = str.length(); //creating a 2D array int cps[N+1][N+1]; memset(cps, 0 ,sizeof(cps)); for (int i=0; i
Read MoreCount all palindrome which is square of a palindrome in C++
In this tutorial, we will be discussing a program to find the number of palindromes which are squares of a palindrome.For this we will be provided with two values L and R. Our task is to find the number of super palindromes in the given range. A super palindrome is the one in which the number and its square both are palindromes.Example#include using namespace std; //checking if the number is a palindrome bool if_palin(int x){ int ans = 0; int temp = x; while (temp > 0){ ans = 10 * ans + ...
Read MoreCount all Palindrome Sub-Strings in a String in C++
In this tutorial, we will be discussing a program to find the number of palindrome sub strings in a string.For this we will be given a string. Our task is to count the number of palindrome sub strings in the given string with length greater than 3.Example#include using namespace std; //counting palindrome strings int count_pstr(char str[], int n){ int dp[n][n]; memset(dp, 0, sizeof(dp)); bool P[n][n]; memset(P, false , sizeof(P)); for (int i= 0; i< n; i++) P[i][i] = true; for (int i=0; i
Read MoreHow to Get Started with C++ Programming?
So you've decided to learn how to program in C++ but don't know where to start. Here's a brief overview of how you can get started.Get a C++ CompilerThis is the first step you'd want to do before starting learning to program in C++. There are good free C++ compilers available for all major OS platforms. Download one that suits your platform or you can use the tutorialspoint.com's online compiler on https://www.tutorialspoint.com/compile_cpp_online.phpGCC − GCC is the GNU Compiler chain that is basically a collection of a bunch of different compilers created by GNU. You can download and install this compiler ...
Read MoreHow can we add/insert a JButton to JTable cell in Java?
A JTable is a subclass of JComponent class and it can be used to create a table with information displayed in multiple rows and columns. When a value is selected from a JTable, a TableModelEvent is generated, which is handled by implementing a TableModelListener interface. We can add or insert a JButton to JTable cell by customizing the code either in DefaultTableModel or AbstractTableModel and we can also customize the code by implementing TableCellRenderer interface and need to override getTableCellRendererComponent() method.Exampleimport java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.table.*; public class JTableButtonTest extends JFrame { private JTable table; private JScrollPane scrollPane; public JTableButtonTest() { ...
Read MoreCount all pairs with given XOR in C++
In this tutorial, we will be discussing a program to find the number of pairs with the given XOR.For this we will be provided with an array and a value. Our task is to find the number of pairs whose XOR is equal to the given value.Example#include using namespace std; //returning the number of pairs //having XOR equal to given value int count_pair(int arr[], int n, int x){ int result = 0; //managing with duplicate values unordered_map m; for (int i=0; i
Read MoreWhat is C++ programming language?
C++ is a programming language developed by Bjarne Stroustrup in 1979 at Bell Labs. C++ is regarded as a middle-level language, as it comprises a combination of both high-level and low-level language features. It is a superset of C, and that virtually any legal C program is a legal C++ program. C++ runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX.It is a language that is − Statically typed − A programming language is claimed to use static typing when type checking is performed during compile-time as opposed to run-time. Compiled − ...
Read MoreHow to implement the search functionality of a JTable in Java?
A JTable is a subclass of JComponent for displaying complex data structures. A JTable component can follow the Model View Controller (MVC) design pattern for displaying the data in rows and columns. A JTable can generate TableModelListener, TableColumnModelListener, ListSelectionListener, CellEditorListener, RowSorterListener interfaces. We can implement the search functionality of a JTable by input a string in the JTextField, it can search for a string available in a JTable. If the string matches it can only display the corresponding value in a JTable. We can use the DocumentListener interface of a JTextField to implement it.Exampleimport java.awt.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.table.*; public ...
Read MoreCount all pairs of an array which differ in K bits in C++
In this tutorial, we will be discussing a program to find the number of pairs of an array which differ in K bits.For this we will be provided with an array and an integer K. Our task is to find the number of pairs who differ by K bits in their binary representation.Example#include using namespace std; //counting number of bits in //binary representation int count_bit(int n){ int count = 0; while (n) { if (n & 1) ++count; n >>= 1; } return count; } ...
Read MoreHow to call C++ functions from Java?
Following are the steps to use native methods.Create a header file (.h file) for a CPP program.Create CPP fileCreate a DLLIn java code, declare the method as native, load the DLL using System.loadLibrary() method and call the method.
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