取决于变量的输出格式字符串 [英] Format string for output dependent on a variable

问题描述

我希望将 Fortran 写入语句格式化为依赖于某个变量.例如，我可以这样写:

write(*,'(3f15.3,3f9.2)') x,y,z,(var(i),i=1,nvari)

其中 nvari = 3.但是，如果在某些情况下，我实际上有 4 个变量(即 nvari = 4).我想写这样的东西:

write(*,'(3f15.3,nvari(f9.2))') x,y,z,(var(i),i=1,nvari)

现在，nvari 可以是任何东西，并且输出将按我喜欢的方式工作.我怎样才能做出这样的事情?

解决方案

如果你使用的是 Intel fortran，它有一个专有的扩展——你可以在尖括号中包含一个现有的变量作为说明符:

p>

 write(*,'(3f15.3,f9.2)') x,y,z,(var(i),i=1,nvari)

I would like to have a Fortran write statement formatted to depend on some variable. For example, I could write:

write(*,'(3f15.3,3f9.2)') x,y,z,(var(i),i=1,nvari)

where nvari = 3. But, what if, in some cases, I actually have 4 variables (i.e. nvari = 4). I would like to write something like this:

write(*,'(3f15.3,nvari(f9.2))') x,y,z,(var(i),i=1,nvari)

Now, nvari can be anything and the output will work as I like. How can I make something like this work?

解决方案

If you are using Intel fortran, it has a proprietary extension for this -- you can include an existing variable in angle brackets to act as a specifier:

  write(*,'(3f15.3,<nvari>f9.2)') x,y,z,(var(i),i=1,nvari)

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