fortran.cat

Fortran namelist is a I/O method introduced in Fortran 77. It later became a standard in Fortran 90. It allows to read/write data as a dictionary like in plain text files. See below for a simple example: Derived types are user defined types. They extend the basic types REAL, INTEGER and LOGICAL. They can be…

Perf is a tool used to profile any code in Linux. By following the steps below, you will manage to profile your Fortran binary. It will only provide a simple overview of each function and how much time is spent there. However, this can be your first steps towards improving the execution time of your…

Derived types are User-defined data types that allows to create complex data structures. It is defined with the TYPE statement. In addition, two different derived types exists: The use of PDT’s derived types can be useful in several ways: Its use allows to parametrize the following properties of an array: User types can be parametrized…

Among several things, pointers can be used to represent an array from a specific shape into another one. It can be useful for certain situations. However, the use of pointers is generally not recommended. This is due to potential memory management risks. For instance, It is important to keep the same size when remapping arrays…

Overloading a subroutine means to redefine its internal functionality for a customized behavior. Overall it adapts the class new characteristics to already wide-spread Fortran functionalities (==, =, + ,-, …). Specifically, this post only focus on the operators (+,-,*,/). In the following example, mynumber is generic class to hold any type of an integer number.…