Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Programming Articles
Page 2509 of 2547
Using return value of cin to take unknown number of inputs in C++
Sometimes we need variable number of inputs in our program. In this program we will see how to use cin to take variable number of inputs.The simple solution is run a loop, and when one specific value is pressed, it stops. The another idea is using the cin >> input. This will return false when value is non-numeric.Example#include using namespace std; main() { int input; int n = 0; cout > input) n++; cout
Read MoreIs there any need of "long" data type in C and C++?
In C or C++, there are four different datatypes, that are used for integer type data. These four datatypes are short, int, long and long long. Each of these datatypes takes different memory spaces. The size varies in different architecture and different operating systems. Sometimes int takes 4-bytes or sometimes it takes 2-bytes. This also happen for the compilers. So we can use cross compilers.The cross compilers are basically a compiler, which is capable of compiling for a platform other than current platform.So if we want to compile the following code in 32bit system, and 64-bit system, it will generate ...
Read MoreC++ Perform to a 2D FFT Inplace Given a Complex 2D Array
Fast Fourier transform (FFT) is an algorithm to compute the discrete Fourier transform (DFT) and its inverse. Basically Fourier analysis converts time (or space) to frequency and vice versa. A FFT rapidly computes transformations by factorizing the DFT matrix into a product of sparse (mostly zero) factors.AlgorithmBegin Declare the size of the array Take the elements of the array Declare three arrays Initialize height =size of array and width=size of array Create two outer loops to iterate on output data Create two outer loops to iterate on input data Compute real, img and ...
Read MoreWhat is Type_FORWARD_ONLY ResultSet in JDBC?
A ResultSet interface in JDBC represents the tabular data generated by SQL queries. It has a cursor which points to the current row. Initially, this cursor is positioned before the first row.You can retrieve the column value at the current row using the getter methods getInt(), getString(), getDate() etc…To move the cursor and to navigate/iterate through the ResultSet the java.sql.ResultSet interface provides various methods such as next(), Previous(), first(), last(), relative(), absolute(), beforeFirst(), afterLast() etc...Type_FORWARD_ONLY Only ResultSetIn forward only ResultSet you can move the cursor only in forward direction. By default, a ResultSet is of type forward only.
Read MoreC++ Program to Create a Random Graph Using Random Edge Generation
In this program a random graph is generated for random vertices and edges. The time complexity of this program is O(v * e). Where v is the number of vertices and e is the number of edges.AlgorithmBegin Develop a function GenRandomGraphs(), with ‘e’ as the number of edges and ‘v’ as the number of vertexes, in the argument list. Assign random values to the number of vertex and edges of the graph, using rand() function. Print the connections of each vertex, irrespective of the direction. ...
Read MoreWhat is TYPE_SCROLL_INSENSITIVE ResultSet in JDBC?
This represents a scrollable ResultSet i.e. the cursor moves in forward or backward directions. This type of ResultSet is insensitive to the changes that are made in the database i.e. the modifications done in the database are not reflected in the ResultSet.Which means if we have established a connection with a database using JDBC program and retrieved a ResultSet holding all the records in a table named SampleTable and, meanwhile if we add some more records to the table (after retrieving getting the ResultSet), these recent changes will not be reflected in the ResultSet object we previously obtained.ExampleConsider we have ...
Read MoreWhat is TYPE_SCROLL_SENSITIVE ResultSet in JDBC?
This represents is a scrollable ResultSet i.e. the cursor moves in forward or backward directions. This type of ResultSet is sensitive to the changes that are made in the database i.e. the modifications done in the database are reflected in the ResultSet.Which means if we have established a connection with a database using a JDBC program and retrieved a ResultSet holding all the records in a table named SampleTable. Meanwhile, if we have added some more records to the table (after retrieving the ResultSet), these recent changes will be reflected in the ResultSet object we previously obtained.Following is an example ...
Read MoreHow to format and display date in Java as '201904'
To format and display date like this i.e. YearMonth, you need to set the pattern:uuuuMMAt first, set a LocalDate:LocalDate localDate = LocalDate.now();Now format and display date as ‘201904’:localDate.format(DateTimeFormatter.ofPattern("uuuuMM"))Exampleimport java.time.LocalDate; import java.time.format.DateTimeFormatter; public class Demo { public static void main(String[] args) { LocalDate localDate = LocalDate.now(); System.out.println("Date = "+localDate); System.out.println("Date (Year and Month) = "+localDate.format(DateTimeFormatter.ofPattern("uuuuMM"))); } }OutputDate = 2019-04-19 Date (Year and Month) = 201904
Read MoreHow can I display Java date as '12/04/2019'
To format and display date like this i.e. Day/Month/Year, you need to set the pattern:dd/MM/yyyyAt first, set a LocalDate:LocalDate localDate = LocalDate.now();Now format and display date as '12/04/2019':localDate.format(DateTimeFormatter.ofPattern("dd/MM/yyyy"))Exampleimport java.time.LocalDate; import java.time.format.DateTimeFormatter; public class Demo { public static void main(String[] args) { LocalDate date = LocalDate.now(); System.out.println("Date = "+date); DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy"); System.out.println("Formatted Date = "+date.format(formatter)); } }OutputDate = 2019-04-12 Formatted Date = 12/04/2019
Read MoreWhat is the difference between the TYPE_SCROLL_INSENSITIVE and TYPE_SCROLL_SENSITIVE ResultSets in JDBC?
In the TYPE_SCROLL_INSENSITIVE ResultSet, the cursor moves in forward or backward directions. This type of ResultSet is insensitive to the changes that are made in the database i.e. the modifications done in the database are not reflected in the ResultSet.Which means if we have established a connection with a database using a JDBC program and retrieved a ResultSet holding all the records in a table named SampleTable. Meanwhile, if we have added some more records to the table (after retrieving getting the ResultSet), these recent changes will not be reflected in the ResultSet object we previously obtained.In the TYPE_SCROLL_SENSITIVE ResultSet, ...
Read More