Fortran is not dead

If we speak mythical programming languages, we will have to talk about Fortran. It is a language focused on numerical calculation, designed in its beginnings for IBM computers and used in scientific and engineering applications and is the oldest of the high-level languages.

Therefore, Fortran was very important in computer science in the last century. You might think that nobody uses it anymore or something does. But the banking sector, in the scientific sector and in other companies that still use this language, pay good amounts of money for experts in the language. It is because of this that many programmers have turned their eyes to Fortran.

Getting GNU Fortran on Ubuntu 20.04 / 18.04

GNU Fortran is a Fortran 95/003/2008 compiler created by GNU. It is also known on the Internet as GFortran. It is open source, released under the GPL license. With the aim of creating a modern compiler capable of running on multiple systems and multiple environments.

The latest version available is version 9. It has many improvements in every Fortran version it supports. You can check the improvements here.

So, let us install GNU Fortran on Ubuntu.

First, open a terminal and add the Ubuntu test repository. This step is only for Ubuntu 18.04.

:~$ sudo add-apt-repository ppa:ubuntu-toolchain-r/test

Next, refresh the APT cache.

:~$ sudo apt update

Finally, install GNU Fortran 9 by using this command:

:~$ sudo apt install gfortran-9

Then, check the installed version.

:~$ gfortran-9 --version
GNU Fortran (Ubuntu 9.3.0-10ubuntu2) 9.3.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Now, let us test it. Create a new file called hello.f90. And add the following.

:~$ nano hello.f90
program hello
write(6,*)'Hello world. Welcome to osradar.'
stop
end

Press CTRL + O to save the changes and CTRL + X to close.

After that, compile it using the terminal.

:~$ gfortran-9 -o hello hello.f90

Then, run it.

:~$ ./hello
Hello world! Welcome to Osradar

So, everything is working.

Conclusion

Fortran is a very old programming language. However, there are sectors where it is very important and that is why there are still tools for the language. In this case, we have Fortran and the GNU Fortran compiler.

If you are a developer, you can get more post about programming.

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The post How to install GNU Fortran on Ubuntu 20.04 / 18.04? appeared first on Linux Windows and android Tutorials.

So imagine for a moment that you lose access to your hard drive. All your personal information could be exposed, even if you took the precaution of deleting it. Sounds a little scary, doesn’t it? However, they have just released a program whose main function is to overwrite the blank space you have on a hard drive. In this way, the information really remains blank, making it impossible to recover it later. In fact, the name of the program is Overwrite. A very interesting tool. So here we show you how to install Overwrite for the empty space of the disks in Windows 10.

Compiling Overwrite with Visual Studio Code

Overwrite is a program written in C language, which is contained in a single file. It can be compiled on different platforms, but here we are going to compile for Windows 10. With that in mind, we are going to use Visual Studio Code. To know how to install it please check our post. In the same way, we’ll need a C/C++ Compiler, for this example I’m going to use MinGW. The installation process is simple, just go to this address and download the installer.

Then double click on the installer. When the wizard starts, select all the options for a basic installation. Next, wait for the wizard to download all the necessary files and proceed to install them. This will take a few minutes, depending on your internet connection.

Add MinGW to the environment variables.

Next, we’ll add the compiler to the Windows environment variables. This is very important because it will allow you to compile from any CMD without going to the address of the program. Also, the Run Code extension of the editor uses the command prompt of Windows to run the compiler. To find out how to do this, I invite you to check out our post about Wget in Windows 10. Here I simply show you the already added variable:

to check that everything has been installed correctly, please press the “Win+R” combination, and run CMD to open a Command Pro.

In the command prompt please type the following command:

gcc

If running the command throws the error that there are no input files, then we are ready to move on.

Install the extensions in Visual Studio Code.

Now we need to add the necessary extensions to compile in C in Visual Studio Code. With this in mind, open the program. And in the Marketplace write C++ and Code Runner, and proceed to download and install them.

All right, we’re ready to compile the program. The first thing we need to do is to download the package from here

Once downloaded, please remember the location of the download and open Visual Studio Code. Once there, in the left column in Explore, locate the folder where you downloaded the program and click on overwrite.c. Then on the menu on the right press Run.

Testing Overwrite

Finally, we have compiled Overwrite, as you can see in the previous screen, there is already an executable file for windows. However, this program does not have a graphical interface but must be executed in a CMD. In addition, it is necessary to open a Command Prompt at the location of the program. To avoid this complication, we will add the environment variable.

Uses of Overwrite

overwrite [-h -v -test -one -rand -block:] (-files: &| -data:) -path: 
-h             Print help and usage message. 
-v             Print program version. 
-test          For test, don't delete written files. 
-one           Overwrite with 1, default with 0. 
-rand          Overwrite with random data, default with 0. 
-block         Block size, default 4096 bytes as NTFS and EXT4. 
-files         Number of files to write, block size each. 
-data          Quantity of data to write, ex: 1mb, 1gb, all. 
-path          Path to directory where to write data. 

Let’s use a practical example. Write 10 files and 10Mb data, on Windows C drive.

 overwrite -files:10 -data:10mb -path:c:\ 

Obviously, there are several commands we can use to run the tool. Very well, we have learned how to install Overwrite for the empty space of the disks in Windows 10. And also, we have seen how to compile C in Visual Studio Code. I hope you enjoyed this tutorial as much as I did. See you next time.

The post Overwrite in Windows 10. A program that overwrites empty space on the disk. appeared first on Linux Windows and android Tutorials.

Some time ago I was talking to you about how to compile C++ on Linux. This served as a gateway for many programming enthusiasts. However, I think you should start with the first thing. What is C++?

In short, C++ is a compiled programming language that supports object-oriented programming. With this language many important applications have been created such as Microsoft Office, LibreOffice and more than half of MariaDB.

Codeblocks to write code better

To write code optimally, it is best to do it with an IDE. Many times choosing the right IDE can reduce coding times and improve the way software is built.

With this in mind is that Codeblocks arises, to be highly configurable and adaptable to each of the developers. It is also supports the Fortran language which although less popular than C++ is still used for educational and scientific purposes. In addition, it has Code completion, class browser and smart indent.

Codeblocks is released under the GPL3 license which guarantees that it is open source and can be installed on various operating systems such as Windows, Mac OS and of course for Linux.

Codeblocks features

There are many features that make Codeblocks a fantastic IDE. These are some of them:

• Open Source. That means it’s free, no tricks, nothing like that. Ideal if you’re learning to program and don’t want to pay for IDE.
• Cross-platform. It can be installed on Windows, Mac Os and Linux. However, the fact that it can be installed on Linux is enough, isn’t it?
• Does not require external libraries because it is written in C++.
• Thanks to the plugins you can extend their functionalities.

It is compatible with many compilers such as GCC, clang or Digital Mars.

Install Codeblocks on Linux

The installation of Codeblocks on Linux is very simple. You should go to this link and select the binary you want. If you use Debian, Ubuntu or one of their derivatives, then you must choose the .deb format. If you use Fedora, openSuse or CentOS 7, then .rpm.

In this case, I will install Codeblocks on a Debian 9 system, so I will choose to download the .deb packages.

Once the file has been downloaded and decompressed. Proceed to install them by terminal. The content of the downloaded file I have put in a folder called codeblocks.

Then, open a terminal, locate it in the directory and run:

:~$ cd codeblocks
:~$ sudo dpkg -i *.deb

In case you have any unfulfilled package or dependency. Run:

:~$ sudo apt --fix-broken install

Finally, open it from the main menu.

And that’s it.

Conclusion

The process of making a program is not simple, it requires a lot of time and tools to make available to the developer a series of features to help in this process. Fortunately there is Codeblocks, a free, multi-platform tool full of ready to use features.

Tell us, are you a C++ developer? Or Fortran? How was your experience with this IDE?

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The post Here is Codeblocks IDE. A simple IDE for C++/ Fortran appeared first on Linux Windows and android Tutorials.