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 2522 of 2547
C++ Program to Implement Expression Tree Algorithm
An expression tree is basically a binary which is used to represent expressions. In expression tree, internal nodes correspond to operators and each leaf node corresponds to an operand. Here is a C++ Program to implement the Expression Tree Algorithm which takes the postfix expression as an input and generates the corresponding expression tree traversed in inorder.AlgorithmBegin function construct_expression_tree(): Flag = 1 when it is operand. Flag = -1 when it is operator. S = suffix[0] means read the first operand from the expression. For i = 0 and ...
Read MoreC++ Program to Implement the Solovay-Strassen Primality Test to Check if a Given Number is Prime
Solovay-Strassen Primality Test is used to test a number whether it is a composite or possibly prime number.AlgorithmsBegin Declare a function modulo to the long datatype to perform binary calculation. Declare m_base, m_exp, m_mod of long datatype and pass them as a parameter. Declare two variables a, b of long datatype. Initialize a = 1, b = m_base. while (m_exp > 0) do if (m_exp % 2 == 1) then a = (a * b) % ...
Read MoreHow to print result of a java expression in JSP?
The tag displays the result of an expression. This is almost similar to the way works. The difference here is that tag lets you use the simpler "." notation to access properties. For example, to access customer.address.street, use the tag .The tag can automatically escape XML tags so they aren't evaluated as actual tags.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultValueInformation to outputYesNonedefaultFallback information to outputNobodyescapeXmlTrue if the tag should escape special XML charactersNotrueExample Tag Example The above code will generate the following result − , &
Read MoreC++ Program to Perform Baillie-PSW Primality Test
The Baillie-PSW Primality Test, this test named after Robert Baillie, Carl Pomerance, John Selfridge, and Samuel Wagstaff. It is a test which tests whether a number is a composite number or possibly prime.AlgorithmMillerTest()Begin Declare a function MillerTest of Boolean type. Declare MT_dt and MT_num of integer datatype and pass as the parameter. Declare MT_a and MT_x of integer datatype. Initialize MT_a = 2 + rand( ) % (MT_num - 4). Initialize MT_x = pow(MT_a, MT_dt, MT_num). if (MT_x == 1 || MT_x == MT_num - 1) then ...
Read MoreHow to write a JDBC application which connects to multiple databases simultaneously?
To connect with a database, you need toRegister the Driver: Select the required database, register the Driver class of the particular database using the registerDriver() method of the DriverManager class or, the forName() method of the class named Class.DriverManager.registerDriver(new com.mysql.jdbc.Driver());Get connection: Create a connection object by passing the URL of the database, username and password (of a user in the database) in string format, as parameters to the getConnection() method of the DriverManager class.Connection mysqlCon = DriverManager.getConnection(mysqlUrl, "root", "password");To connect to multiple databases in a single JDBC program you need to connect to the two (or more) databases simultaneously using ...
Read MoreHow to set result of a java expression in a property in JSP?
The tag is JSTL-friendly version of the setProperty action. The tag is helpful because it evaluates an expression and uses the results to set a value of a JavaBean or a java.util.Map object.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultValueInformation to saveNobodytargetName of the variable whose property should be modifiedNoNonepropertyProperty to modifyNoNonevarName of the variable to store informationNoNonescopeScope of variable to store informationNoPageIf target is specified, property must also be specified.Example Tag Example The above code will generate the following result −4000
Read MoreHow to initialize private static members in C++?
Here we will see how to initialize the private static member variables initialization in C++. We can put static members (Functions or Variables) in C++ classes. For the static variables, we have to initialize them after defining the class.To initialize we have to use the class name then scope resolution operator (::), then the variable name. Now we can assign some value.The following code will illustrate the of static member initializing technique.Example#include using namespace std; class MyClass{ private: static int st_var; public: MyClass(){ st_var++; //increase the value ...
Read MoreHow to write a JDBC program to extract data from multiple databases?
To connect with a data base, you need toRegister the DriverSelect the required database register the Driver class of the particular database using the registerDriver() method of the DriverManager class or, the forName() method of the class named Class.DriverManager.registerDriver(new com.mysql.jdbc.Driver());Get connectionCreate a connection object by passing the URL of the database, username and password of a user in the database (in string format) as parameters to the getConnection() method of the DriverManager class.Connection mysqlCon = DriverManager.getConnection(mysqlUrl, "root", "password");And, to extract data you need to execute the select query as:ResultSet rs = stmt.executeQuery("Select * from Employee");To print the contents of the ...
Read MoreMeaning of 'const' last in a function declaration of a C++ class?
Sometimes we can find the keyword ‘const’ present at the last of function declaration. So what does it mean?Using this one function can be made as constant. The idea of constant function is that, the function cannot be modified from the objects, where they are called. It is recommended to use the constant functions in our program.Let us see one example of constant function.Example#include using namespace std; class MyClass { int value; public: MyClass(int val = 0) { value = val; } int getVal() const ...
Read MoreWhat is an unsigned char in C++?
In C++ we have seen there is character type data called char. Sometimes we have seen unsigned char also. So here we will see what is basically the unsigned char means. What are the basic differences between signed char and unsigned char?Signed char and unsigned char both are used to store single character. The variable stores the ASCII value of the characters. For an example if ‘A’ is stored, actually it will hold 65. For signed char we need not to write the signed keyword. But for unsigned, we have to mention the keyword. The syntax is like below.unsigned char ...
Read More