我有一个代码,我想从另一种语言翻译成Fortran。代码有一个大数字向量 - V(n)
- 以及名为tn的众多变量(其中n是一到四位数字)和许多当前写为整数的实数。为了让Fortran将整数视为双精度,我想将.0D0
添加到每个整数的末尾。
所以,如果我有一个像:
这样的表达式V(1000) = t434 * 45/7 + 1296 * t18
我希望Vim将其更改为:
V(1000) = t434 * 45.0D0/7.0D0 + 1296.0D0 * t18
我一直在尝试使用负面观察来忽略以t
或V(
开头的表达式,然后向前看或者找到数字的结尾,但是我'我没有运气。有没有人有任何建议?
答案 0 :(得分:5)
V(1000) = t434 * 45/7 + 1296 * t18
命令:
:%s/\(\(t\|V(\)\d*\)\@<!\(\d\+\)\d\@!/\3.0D0/g
结果:
V(1000) = t434 * 45.0D0/7.0D0 + 1296.0D0 * t18
命令是:
:%s/ search/replace on every line
\(\(t\|V(\)\d*\) t or V(, followed by no or more numbers
otherwise it matches 34 in t434
\@<! negative lookbehind
to block numbers starting with t or V(
\(\d\+\) a run of digits - the bit we care about
\d\@! negative lookahead more digits,
otherwise it matches 10 in 1000
/ replace part of the search/replace
\3 match group 3 has the number we care about
.0D0 the text you want to add
/g global flag, apply many times in a line