如何使用C解析文件？ [英] How to parse a file using C?

问题描述

这是文件样本。

Here is the file sample.

########################################### Configuration File for Employee Information ##########################
#################################
  ID = 101
  Name = Anjum ####### She works for Innobox 
  sal= 30000# per month
  Experience = 5.4 
#################
ID = 102
  Name = Satya      ####### He works for Innobox 
  sal= 60000# per month
  Experience = 7.4 
####################




	ID = 103
  Name =     Ramana ####### 
  sal= 70000# per month
  Experience = 8.4
####################


	ID = 104
  Name = Trinadh ####### ## He works for Innobox
  sal     =        60000# per month
  Experience = 7.0
######################

i需要解析它并将所有数据存储在结构中。打印。



结构成员是 -

1.ID

2.name

3.salary

4.experience



任何条款？

i need to parse it and store all data in a structure. and print.

structure members are-
1.ID
2.name
3.salary
4.experience

Any claue?

推荐答案

不，我不喜欢潜入评论中的所有代码。



但这应该给你一个第一个想法：

a。）逐行阅读

b。）从第一次出现＃到行尾删除每一行，因为＃似乎开始发表评论。

c。）如果转换线不为空且包含=，则评估剩余的a = b



不是可以解决的问题使用imediatelly，但也许有一些关于逻辑的提示。



请参阅解决方案＃3了解实现提示。

No I don't like to dive trough all the code in your comment.

But this should give you a first idea:
a.) Read line by line
b.) Delete for each line from first occurence of "#" to the end of line, becuase "#" seems to start comment.
c.) In case remaing line is not empty and contains a "=" then evaluate remaining "a = b"

Not a solution which can be used imediatelly, but maybe some hints about the logic.

See solution #3 for implementation hints.

您的语言可能是在伪EBNF中定义，如

Your language might be defined in "pseudo" EBNF like

File       = { Skip } { Record } .
Record     = Field<ID> Field<Name> Field<Sal> Field<Experience> .
Field<Key> = { WS } Key { WS } "=" { WS } Text { Skip } .
Skip       = { WS } [HASH { ANY-CHAR-EXCEPT-NL } ] NL .
Text       = ANY-CHAR-EXCEPT-HASH-WS { ANY-CHAR-EXCEPT-HASH-WS } .

按照Bruno Sprecher所描述的步骤在解决方案＃2中。

您可以使用C函数

• strcspn
• strtok
• strncpy




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