position of an item in a QStringList

[jpn]

The position of SPNT change depending on the file. How do I set a start if I do not know where the SPNT will appear in another file?

There are many ways to do that, really. Here's pseudo code to go through all the instances of 'SPNT' in a string list.

from = 0
index = 0
while ( index = strlist.indexOf('SPNT', from) != -1 )
    ...
    from = index
endwhile

from = 0
index = 0
while ( index = strlist.indexOf('SPNT', from) != -1 )
    ...
    from = index
endwhile

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Actually I have a file like this:
...
And I put it in this format:
...
There must be an easier way that my.

Why don't you read it line by line and insert VELF in the beginning of line where the line doesn't start with SPNT?