## Data Structure – Queue Basics

Queue is a linear data structure and an abstract data type which is defined using some basic data type in programming languages. A queue is implemented using an array or a linked-list type in a programming language.

## C Programming Tutorial – Functions

Functions are another feature in C programming language which helps in achieve a particular task. There is at least one function in a C program and it’s called the main () function. Without main there is no C program. You cannot delete the main function, but you can delete other user-defined functions.

## C++ Program to Count the Occurrence of a Digit in a Number

The C++ program to count the occurrence of a digit in a number is a simple program that receives two inputs.

1. A number
2. A digit

It counts the number of times a digit appears in the given number and prints the output. The occurrence is 0 when the digit is not in the number.

This program is intended for beginners of C++ programming language. We used Dev-C++ compiler – version 4.9.9.2 installed on a Windows 7 64-bit computer. This program code will work with any standard C++ compiler if the correct header files are used.

## C++ Program to Solve Quadratic Equations

The C++ program to solve quadratic equations in standard form is a simple program based on the quadratic formula. Given the coefficients as input it will solve the equation and output the roots of the equation.

## C++ Program to Convert Radian to Degree

This is program is based on a simple mathematical concept. The degree is converted to radian value or radian is converted to degrees for computing trigonometric identities.

## DBMS – Basics

DBMS stands for Database management system is software than help users to access database efficiently.

Before DBMS, data was stored in operating system files and each file had its own rules and constraints that required specific applications to access the data.

## Digital Design – Derived Logic Gates

There are some logic gates that are derived from the basic gates such as AND, OR and NOT by combining them into single unit. These kinds of logic gates are very important for creating complex logic circuits.

## Digital Design – Logic Gates

Voltage or current applied to analog circuits such as telephone systems as analog signals with continuous range from 0 to 5 V.

A digital circuit recognize only 1 and 0, so in these voltage operated circuit – a low voltage 0V is binary 0 and a high voltage 5V is binary 1.

## C Programming Tutorial – Do-While Loop

The do-while loop is a different kind of loop which checks for exit conditions instead of entry condition. So it is very useful if you want a loop that keep iterating until an exit criteria is met.

In a C program, the do-while loop will let you execute you code first and then checks for test condition if it is true to complete the execution.

## C Programming Tutorial – for Loop

The ‘for’ loop is a simpler version of the while loop that we learned in the previous lesson. It has the same components as while loop.