Software Engineering

C++

Unique_ptr in C++

A unique_ptr is like a normal pointer, except the fact that it "owns" the object to which it points, as mentioned above. The word "unique" in the title refers to the fact that at a time, only one unique_ptr can point to a given object and the object is destroyed when the pointer is destroyed.

C++

Program Flow control in C++

The flow of control jumps from one part of the program to another, depending on calculations performed in the program. Program statements that cause such jumps are called control statements. We have covered for, while, do while loop, if else, switch, break, continue, goto and functions.

C++

Friend Function in C++

C++ allows a mechanism, in which a non-member function has access permission to the private members of the class. This can be done by declaring a non-member function friend to the class whose private data is to be accessed. The friend is a keyword.

Software Engineering

Understand Inheritance in depth

Inheritance is the process by which objects of one class acquire the properties of objects of another class. It supports the concept of hierarchical classification. The different types of inheritance are single, multilevel, hierarchical, hybrid, multipath and multiple inheritance

C++

Operator Overloading in C++

Operator overloading is an important concept in C++. It is a type of polymorphism in which an operator is overloaded to give user defined meaning to it. Overloaded operator is used to perform operation on user-defined data type. We give examples of unary ++, bitwise + and arithmetic + operators

C Programming

Storage classes in C

A Storage Class defines the scope (visibility) and life-time of variables and/or functions within a C Program. They precede the type that they modify. Storage classes are used in C programming are Automatic variables (auto), External variables (extern) Static variables (static) and Register variable

C++

Threads in C++

Threads are generally referred to as lightweight processes and executes different parts of a program and shares memory, file descriptors and system resources. We explore multithreading creation of threads with free, member function, functor object, lambda expression, race condition with mutex

C Programming

Dynamic memory allocation in C

The process of allocating memory at run time is known as dynamic memory allocation. Although C does not inherently have this facility, there are four library routines that can be used for allocating and freeing memory during program execution: malloc, calloc, realloc and free

C++

Function Overriding in C++

Function overriding (compile time polymorphism) is a feature in C++ that allows us to have a function in child class which is already present in the parent class. A child class inherits the data members and member functions of parent class and to override functionality, function overriding is used

C++

Function Overloading in C++

Function overloading is a feature in C++ where two or more functions can have the same name but different parameters. This is used in situations when a class B is inherits from class A and a particular behaviour of the class B needs to be modified.

C++

for loop in C++

For loop has three components: initialization Statement, test Expression and update Statement. We have explored for loop in C++ and presented examples and compared it with while loop.

C Programming

Static memory allocation in C

In C, the default way of memory allocation is static. Static memory allocation is an allocation technique which allocates a fixed amount of memory during compile time and the operating system internally uses a data structure known as Stack to manage it We define static variables and how to delete it

Software Engineering

goto statement in C

The goto statement is a jump statement which is sometimes also referred to as unconditional jump statement. The goto statement can be used to jump from anywhere to anywhere within a function. The use of goto statement is highly discouraged and can be avoided using break and continue statements.

Software Engineering

Break Statement in C

Break Statement is a loop control statement which is used to terminate the loop. As soon as the break statement is encountered from within a loop, the loop iterations stops there and control returns from the loop immediately to the first statement after the loop. break can be used in all loop

Software Engineering

Error Handling in C

In C when some error occurs then -1 or NULL value is returned and a global variable errno is set with the error code.Hence we use returned values to check errors. We use EXIT_SUCCESS ,EXIT_FAILURE to deal with errors. There are three types of errors syntax, logical and semantic.

Software Engineering

Functions in C

A function in C is a set of statements that take inputs, do some specific computation and produces output. The idea is to put some commonly or repeatedly done task together and make a function, so that instead of writing the same code again and again for different inputs, we can call the function.

Software Engineering

An in-depth look into Recursion in C

Recursion is a coding technique/ design in which a function calls itself directly or indirectly and the corresponding function is called as recursive function. Using this many problems can be solved easily with less time. C, C++, Java, Python, Go and others support Recursion except Fortan 77

Software Engineering

malloc vs calloc vs realloc

We take a deep look into the 3 dynamic memory allocation techniques in C/ C++ namely malloc, calloc and realloc and explore the difference. malloc stand for memory allocations, calloc for contiguous allocation and realloc for re-allocation.

Software Engineering

List in Java

There is a List interface in Java which is a child interface of Collection. The List interface supports access, insertion, deletion of the elements. Each element in List has its own index, starting at 0, then 1 and so on. To create List objects we have ArrayList() LinkedList() Vector() and Stack()

Software Engineering

HashMap in Java

In Java, HashMap is a Map based collection class that is used for storing Key and value pairs which is denoted as HashMap. It does not maintain order of elements, allows one null key, multiple null values, is not thread safe, default size is 16, default load factor is 0.75 JDK1.7, JDK1.8

Software Engineering

Ivan Edward Sutherland: Father of computer graphics

Ivan Edward Sutherland is a computer scientist, entrepreneur and Turing Award Winner and is regarded as the Father of Computer Graphics. He is associated with Harvard University, Massachusetts Institute of Technology and Sun Microsystems, Evans and Sutherland and Sutherland Sproull and Associates

Software Engineering

Install Git on any operating system

We have covered the commands to install git for the following operating systems: Ubuntu, RHEL, OpenSUSE/ SLES/ SLED, Windows, MacOS and Fedora. Following the installation, you need to configure git to add your username and email id to get started.

Software Engineering

for loop in C

Loop is a programming concept which is natively supported by C. Loops are used to repeat a particular coding task where each repetition follows a particular pattern which can be incorporated in a code. Example of such a task is printing integers from 1 to 10.

Software Engineering

Markdown cheatsheet

In this markdown cheatsheet, you will learn about markdown heading, table, list, link, image, code, quote, highlight, bold, italics, strikethrough and others. Markdown is a simple lightweight markup language which is widely used as a formatting language on the web.

Software Engineering

Integer datatype in C: int, short, long and long long

In C programming language, integer data is represented by its own in-built datatype known as int. It has several variants which includes int, long, short and long long along with signed and unsigned variants The size of int is 4 bytes and range is -2147483648 to 214748364 long long is of 16 bytes