Fortran中根据字符串动态确定变量名 [英] Determine variable names dynamically according to a string in Fortran

问题描述

我想使用 Fortran 创建一个动态变量名.

I want to create a dynamic variable name using Fortran.

将通过连接一个字符串和另一个字符串/整数来获得变量名.然后我想用这个变量名来存储一个值或另一个变量.

The variable name will be obtained by concatenating a string and another string/integer. Then I want to use this variable name to store a value or another variable.

例如

! assign values to 2 variables

    my_string = h
    my_integer = 1

! perform concatenation resulting in the dynamic variable name,  h1


! Set the value of variable h1 to another integer value

    h1 = 5

推荐答案

我认为您想使用数据结构.如果您有成对或成组的值组合在一起，则创建一个可以容纳两者的派生数据类型.这个页面有说明:

I think you want to use a data structure. If you have pairs or groups of values that go together, then create a derived data type which can hold both. There's an explanation on this page:

http://web.mse.uiuc.edu/courses/mse485/comp_info/derived.html

如果您有这些对的列表(如上面的 string 和 int)，那么您可以创建这些类型的数组.下面的示例代码取自上面链接的页面:

If you have a list of these pairs (like your string and int above), then you can create an array of these types. Example code below taken from the page linked above:

type mytype
   integer:: i
   real*8 :: a(3)
end type mytype

type (mytype) var

数组:

type (mytype) stuff(3)

var%i = 3
var%a(1) = 4.0d0
stuff(1)%a(2) = 8.0d0

这样做的一个显着好处是您可以将项目对/组一起传递给函数/子例程.这是一个重要的编程原则，称为封装，在面向对象编程范式中被广泛使用.

An significant benefit of doing this is that you can pass the pairs/groups of items to functions/subroutines together. This is an important programming principle called Encapsulation, and is used extensively in the Object Oriented programming paradigm.

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