C++ Introduction

use more keyphrases or synonyms in your H2 and H3 subheadings

Difference between C and C++

C	Cpp
C language is a procedure oriented programming language	Its is partially object oriented programming language
It follow top-down approach	It follows bottom-up approach
It doesn’t support function or operator overloading	It doesn’t support function as well as function overloading
C language doesn’t support virtual and friend functions	This language supports both virtual and friend functions
C language have 32 keyword	This language have 52 keyword

Advantages and disadvantages in Cpp

Feature	Advantage	Disadvantage
Code reusability	Techniques like OOP, templates	Manual memory management
Standardization	Standardized every 3 years	Performance and code size can be an issue
Compatibility	Code can work across multiple devices/platforms	Feature rich and can be difficult to learn
Performance	Code size and performance can be better than C	Code can be difficult to maintain
Support	Great support and tools available for embedded developers
Modern features	Modern language with modern features

Hello World

Example-1

#include <iostream>

using namespace std;

int main()
{
    cout<<"ArunEWorld";

    return 0;
}

• Output: ArunEworld
• Here
  • cout – console output

Example-2

#include <iostream>
#include <string>
using namespace std;

int main()
{
    string name = "ArunEworld";
    cout<< name <<endl;

    return 0;
}

• Output: ArunEworld
• Here
  • endl – end line
  • string is the data type or container can hold the string variable.

Namespace

What is namespace in cpp?

• A namespace is a group of related elements that each have a unique name or identifier.

Why namespace is required in cpp?

• Answer will be added

Data Type

• char – Single character
• string – Multiple characters
• int – Whole numbers
• float – Decimal numbers
• double – Decimal numbers
• bool – boolean values

String

Example-1

#include <iostream>
#include <string>
using namespace std;

int main()
{
    string site = "ArunEworld";
    site[4]='P';
    cout<< site <<endl;

    return 0;
}

• Output: ArunPworld
• Here
  • site act as array,

Static Cast in Cpp

#include <iostream>
using namespace std;
int main()
{
    float pi_val = 3.14159;
    //int result = pi_val; // this is how you do in C
    int result = static_cast<int>(pi_val);
    cout << result <<endl;
}

• Output: 3
• Here : float value can typecast into integer value

Reference:

wiki