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Added some more information (#27749)

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This commit is contained in:
samujjal1618
2019-03-04 01:13:13 +05:30
committed by Christopher McCormack
parent f40c83cae6
commit 99906d2589
1 changed files with 4 additions and 4 deletions
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8
guide/english/cplusplus/index.md
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@ -6,7 +6,7 @@ title: C++
## What is C++? ## What is C++?
* C++ is a general purpose programming language which has been used since the 1990's * C++ is a general purpose programming language which has been used since the 1990's
* It was designed by Bjarne Stroustrup under the name "C with classes". * It was designed as a thesis paper by Bjarne Stroustrup under the name "C with Classes", which later became C++.
* It is a version of C that includes Object-Oriented elements, including classes and functions. * It is a version of C that includes Object-Oriented elements, including classes and functions.
* It is considered one of the biggest programming languages, as you can see in the following image: * It is considered one of the biggest programming languages, as you can see in the following image:
@ -20,7 +20,7 @@ _source: Github_
using namespace std; using namespace std;
int main() int main()
{ {
cout << "Hello World" << endl; cout << "Hello World!" << endl;
return 0; return 0;
} }
``` ```
@ -41,8 +41,8 @@ Now, let's break down the code:
using namespace std; using namespace std;
``` ```
* The first line tells the computer to use the "iostream" header file for this specific program. A header file is a separate file with prewritten C++ code. There are many other header files which are required for a specific program to run properly. For example, math, vector, string, etc. Header files are generally represented by a ".h" extension, when including standard library header files you don't include the ".h" extension. * The first line tells the computer to use the `iostream` header file for this specific program. A header file is a separate file with pre-written C++ code. There are many other header files which are required for a specific program to run properly. For example, `math`, `vector`, `string`, etc. Header files are generally represented by a `.h` extension, when including standard library header files you don't include the `.h` extension.
* The `iostream` header contains the public interface for the input-output stream from the standard library. The "iostream" file contains code for allowing the computer to take input and generate an output, using the C++ language. * The `iostream` header contains the public interface for the input-output stream from the standard library. The `iostream` file contains code for allowing the computer to take input and generate an output, using the C++ language.
* The second line tells the computer to use the standard namespace which includes features of standard C++. You could write this program without this line, but you'd have to use `std::cout` instead of `cout` and `std::endl` instead of `endl` on line 4. It makes the code more readable and our lives as programmers easier. * The second line tells the computer to use the standard namespace which includes features of standard C++. You could write this program without this line, but you'd have to use `std::cout` instead of `cout` and `std::endl` instead of `endl` on line 4. It makes the code more readable and our lives as programmers easier.
#### Line 3 and 4 #### Line 3 and 4