Perplexing and Bursting: An Introduction to Using Fortran in Visual Studio

Install the Fortran Compiler

In order to begin working with Fortran in Visual Studio, it is paramount to first install a Fortran compiler. There are a variety of compilers to select from, allowing you to tailor your choice to your own needs and preferences. The most popular options include Intel Fortran, GNU Fortran, and Silverfrost FTN95. Visit each individual compiler’s respective website to begin downloading and subsequently installing.

Install Visual Studio

After acquiring the necessary Fortran compiler, you will then need to augment your skills with Visual Studio. This integrated development environment (IDE) is essential in supporting multiple programming languages, including Fortran. Download from Microsoft’s official website and ensure you select the optimal version that supports Fortran before integrating.

Create a Fortran Project

Upon acquiring both the Fortran compiler and Visual Studio, you can then commence the process of creating a Fortran project. It is important to follow the steps illustrated below:

1. Open Visual Studio.
2. From the File menu, select New > Project.
3. In the New Project dialog box, select Fortran located in the Installed Templates section.
4. Indicate the type of Fortran project you are interested in initiating (i.e. Console Application, Windows Forms Application).
5. Select the name of your project and opt for a location to save it.
6. Click the Create button.

Understand Fortran Syntax

The syntax of Fortran vastly differs from most other programming languages. It is key to have a grasp on the basic features outlined below:

• Fortran uses fixed-format syntax where every line of code has a precise length and arrangement.
• Fortran keywords use uppercase letters (examples include “PROGRAM”, “INTEGER,” and “END”).
• Fortran possesses a variety of data types for a range of information, such as INTEGER, REAL, and COMPLEX.
• Fortran also has built-in functions and subroutines such as “SIN”, “COS”, and “SQRT” for mathematical operations.

Write and Run a Fortran Program

After completing the process of creating a Fortran project and understanding its syntax, you can start writing your very first Fortran program. Here is a simple example of a program that adds two numbers together:


PROGRAM SUM
IMPLICIT NONE
INTEGER :: A, B, C
A = 5
B = 7
C = A + B
PRINT *, 'The sum of', A, 'and', B, 'is', C
END PROGRAM


To execute this program, follow the steps below:

1. Save the program as either a .f90 or .f95 file in the project directory.
2. From the Debug menu, select Start Without Debugging or press the F5 key.
3. The program will compile and run, displaying its output in the Operation window.

In conclusion, delving into the world of Fortran in Visual Studio is an excellent method of creating a wide range of scientific and engineering applications. By following and practicing the aforementioned steps, you can establish a great foundation on this programming language, explore more advanced features, and eventually design your own innovative Fortran applications.