问：这有什么问题？ [英] Q: What's wrong with this?

问题描述

这与我以前的帖子有关，但我让它更简单......


open（INFILE，& ; test.txt"）;

while（<>）{

print $ _;

s / one / two / g;

打印$ _;

}


我现在真的想不到 - 为什么test.txt的内容不是

改变了吗？

打印$ _输出给我

一个

两个

一个

两个


但是cat test.txt仍然是：

one

one
>

谢谢

Hi,

This is related to my previous post but I made it much simpler...

open (INFILE, "test.txt");
while (<>) {
print $_;
s/one/two/g;
print $_;
}

I really cannot think now - why are the contents of test.txt not being
changed?
print$_ output gives me
one
two
one
two

but cat test.txt is still:
one
one

Thanks

推荐答案

_;

s / one / two / g;

print

_;
s/one/two/g;
print

_;

}


我现在真的想不起 - 为什么test.txt的内容没有被改变？
改变了？

print

_;
}

I really cannot think now - why are the contents of test.txt not being
changed?
print

_输出给了我

一个

两个

一个

两个


但是cat test.txt仍然是：

one br />
一个


谢谢

_ output gives me
one
two
one
two

but cat test.txt is still:
one
one

Thanks

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