c++ classes in vadodara

WHAT IS SYNTAX?

Programming languages have a grammar known as Syntax. This is the basics of everything you are going to write in C++. There is some set of rules which states how you should write the codes and understand them. Here are some examples of codes to make your feel familiar with the syntax 

#include <iostream> //header file library

using namespace std; //using standard library

int main() { //main function

  cout << “Hello World \n”; // first object

  cout << “Learn C++ \n\n”; //second object with blank line

  cout << “Educative Team”; //third object

  return 0; //no other output or return

} //end of code to execute

The syntax here used

#Includes <iostream> this header is a file library. This helps in importing features into your program. This basically refers to the program copy of the content from the file known as <iostream>. Iostream refers to input and output streams, defining the standards of code for the objects. 

Using namespace std states that we are using objects and variable names from the Standard library of C++. you’ll always find this statement with the abbreviation keyword Std and operator ::. The int main () is used to precisely state the main function.

This is a very important part of C++ programming that can be trained from c++ classes in vadodara, this function mainly defines the action of the code you write. Anything coded within the curly brackets {} will be executed.

Cout which is pronounced as out is an object. This defines the output which is strings of words. You are supposed to write new objects using cout in the next line. The character \n executes the text in different lines.

When you include \n\n this creates a blank space. When you write return 0, we say to the program that nothing is returning. We are just outputting strings of text. When we use the << operator to name the objects. The semicolon ; acts like a period. 

Read More: The Best Programming Languages for Cybersecurity Careers

 C++ TERMS AND VOCABULARY 

Now that we know how C++ looks, let’s understand some terms that were mentioned and introduced. 

KEYWORDS

Keywords are predetermined words that are used to identify things in the written code. They are identifiers of particular objects, variables, and actions of codes. You can even create your own version of keywords. Some keywords are 

  • Goto
  • Float
  • Public
  • class(1)
  • Int

VARIABLES 

Variables act like containers of values stored. If you want to declare a variable, you should give it a value and a type using the right word. Every variable in C++ needs a name or an identifier. Here are some basic syntax rules to follow when you are making identifiers for the variables. 

  • Names are case sensitive
  • Names can consist of letters, numbers, and underscores
  • Names should start with a letter or an underscore
  • Names cannot have whitespace or special character
  • Names cannot use reserved keywords

Here are six different types of variables.

int myNum = 5;              // Stores integers (whole numbers)

float myFloatNum = 5.99;     // Stores decimals floating point number

double Double Num = 9.98;   // Floating point number

char myLetter = ‘D’;         // Stores single characters

bool myBoolean = true;       // Stores Boolean, values with a true or false state

string myText = “Hello”;     // Stores strings of text

DATA TYPES

Data types are the classifiers for different kinds of data you have in your program. Data types let you tell your variable which data they can store. There are three data types in C++

  • Primitive data types – you’ll find these as the built-in data which can be used to detect variables. Which includes integer, character, boolean, floating-point, double floating-point, void, and wide character.
  • Deprived data types – these are extracted from primitive data, which includes function, references, array, and pointer.
  • user-defined date types –  these are defined by the programmer. 

STRINGS

C++ has an object called strings. These are set characters within “ ”  quotes, like the “Hello world”  string. As they are objects you can perform functions with them, like the length( ) function, which helps confine the length of a string.

OPERATORS

The symbols which manipulate the data and the performing operations are what operators are. In C++ you can easily overload the operators and make them work for programmer-defined classes. What overloading refers to is that you can operate too many functions at a time. You’ll find four kinds of operators in the C++ language

  • Arithmetic operators – these are used for mathematical operations, just like algebraic symbols.
  • Assignment operators – these are assigning values to the variables
  • Comparison operators – these compare two variables
  • Logical operators – these help in determining the logic between values

OBJECTS

An object is nothing but a collection of Data that we can act upon. Any object in C++ has its own traits and abilities or say attribute and method. You can construct objects by using any class. Objects are like blueprints.

You create a class by using the keyword class. Then you must define an access specifier like public, private, or protected. The public keyword refers to that the class can be accessed outside the class too. After defining your class you can define its attributes and objects. 

FUNCTIONS 

When invoked these blocks of codes run. They are like workhorses of the program and are used when you want to perform operations or manipulate the code. 

These play a very important role in the reusability of the code and help you easily modify the code. These are actions that you initiate. In C++ these are functions that are predetermined, like main ( ).

To create a function you have to give a declaration of name and parentheses ( ). You can invoke these at any point by using a name ( ).

There are many ways in which you can use the functions. You can even attach return values to the functions, to determine if a function should use the information for output. The keyword void states that nothing will be returned once invoked. The keyword return will call for a data type output.

By Anurag Rathod

Anurag Rathod, as a blogger he used to spread all about app-based business, startup solution, on-demand business tips and ideas and so on.