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This is a C++ program to compute Combinations using Recurrence Relation for nCr.AlgorithmsBegin function CalCombination(): Arguments: n, r. Body of the function: Calculate combination by using the formula: n! / (r! * (n-r)!. EndExample#include using namespace std; float CalCombination(float n, float r) { int i; if(r > 0) return (n/r)*CalCombination(n-1,r-1); else return 1; } int main() { float n, r; int res; coutn; coutr; res = CalCombination(n,r); cout
When we execute certain SQL queries (SELECT query in general) they return tabular data.The java.sql.ResultSet interface represents such tabular data returned by the SQL statements.i.e. the ResultSet object holds the tabular data returned by the methods that execute the statements which quires the database (executeQuery() method of the Statement interface in general).The ResultSet object has a cursor/pointer which points to the current row. Initially this cursor is positioned before first row.The first() method of the ResultSet interface moves the pointer of the current (ResultSet) object to the first row, from the current position.This method returns a boolean value specifying whether the ResultSet cursor ... Read More
To prevent a user from accessing a specific schema, you need to use delete command. Following is the syntax −DELETE FROM mysql.db WHERE Db IN("yourSpecificSchema", "yourSpecificSchema\_%") AND User = "yourUserName" AND Host = "yourHostName";Let us implement the above syntax to prevent a user from accessing a specific schema. First of all, let us display all users and host from MySQL.user table.mysql> select user, host from MySQL.user;This will produce the following output −+------------------+-----------+ | user | host | +------------------+-----------+ | Bob | % ... Read More
We cannot directly access the instance variables within a static method because a static method can only access static variables or static methods.An instance variable, as the name suggests is tied to an instance of a class. Therefore, accessing it directly from a static method, which is not tied to any specific instance doesn't make sense. Therefore, to access an instance variable, we must have an instance of the class from which we access the instance variable.Example:public class Test { public int instanceVariable = 10; public static void main(String args[]) { Test test ... Read More
We will displays labels in a label with 5 rows and 4 columns using GridLayout −JPanel panel = new JPanel(new GridLayout(5, 4, 10, 10));Use a for loop and loop through 1 to 20 to display 20 labels −for (int i = 1; i
For this, you can use DATEDIFF(). Let us first create a table −mysql> create table DemoTable -> ( -> ShippingDate datetime -> ); Query OK, 0 rows affected (0.90 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-07-01'); Query OK, 1 row affected (0.29 sec) mysql> insert into DemoTable values('2019-07-02'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('2019-07-03'); Query OK, 1 row affected (0.32 sec) mysql> insert into DemoTable values('2019-07-04'); Query OK, 1 row affected (0.15 sec)Display all records ... Read More
The HTML DOM input button form property returns the reference of the form which enclose the input button.SyntaxFollowing is the syntax −object.formExampleLet us see an example of input button form property − Live Demo
The HTML DOM Input DatetimeLocal readOnly property sets/returns whether Input DatetimeLocal can be modified or not.SyntaxFollowing is the syntax −Returning boolean value - true/falseinputDatetimeLocalObject.readOnlySetting readOnly to booleanValueinputDatetimeLocalObject.readOnly = booleanValueBoolean ValuesHere, “booleanValue” can be the following −booleanValueDetailstrueIt defines that the input datetimeLocal field is readOnly.falseIt defines that the input datetimeLocal field is not readOnly and can be modified.ExampleLet us see an example of Input DatetimeLocal readOnly property − Live Demo Input DatetimeLocal readOnly form { width:70%; margin: 0 auto; text-align: center; } * { ... Read More
The KeyboardEvent keyCode property returns the unicode character codes corresponding to character that was pressed using an event.Note − Use key property instead for accurate resultsSyntaxFollowing is the syntax −Returning latest typed character’s keyCode −event.keyCodeExampleLet us see an example for KeyboardEvent keyCode property − Live Demo KeyboardEvent keyCode form { width:70%; margin: 0 auto; text-align: center; } * { padding: 2px; margin:5px; } input[type="button"] { border-radius: 10px; } KeyboardEvent-keyCode ... Read More
This is a C++ program to perform integer partition for a specific case. In this program, a positive integer n is given, and shall have to generate all possible unique ways to represent n as sum of positive integers.AlgorithmBegin function displayAllUniqueParts(int m): 1) Set Index of last element k in a partition to 0 2) Initialize first partition as number itself, p[k]=m 3) Create a while loop which first prints current partition, then generates next partition. The loop stops when the current partition has all 1s. 4) Display current partition as displayArray(p, k + ... Read More