替换一行内容

Question

我有一个文本文件

# The INPUT tag can be used to specify the files and/or directories that contain
# documented source files. You may enter file names like "myfile.cpp" or
# directories like "/usr/src/myproject". Separate the files or directories
# with spaces.

INPUT    = " "

# This tag can be used to specify the character encoding of the source files
# that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is
# also the default input encoding. Doxygen uses libiconv (or the iconv built
# into libc) for the transcoding. See http://www.gnu.org/software/libiconv for
# the list of possible encodings.

我必须在“

之间输入INPUT行中的路径名

我的代码

use strict;
use warnings;

open(FILE, "< abcd") or die $!;
open(FILE1, "> abcd1") or die $!;

my @lines = <FILE>;
my $i = $ARGV[0];
$lines[5] = "";
splice @lines,5,0, 'INPUT    = "$i"';

print FILE1 @lines;
close(FILE);

，输出为

INPUT    = "$i"

但我希望输出

INPUT    = "abcd"           #abcd is whatever is passed as arguments

Answer 1

这应该有效：

splice @lines,5,0, "INPUT    = \"$i\"";

Answer 2

你需要双引号来在字符串中插入$i变量，所以

splice @lines,5,0, "INPUT    = \"$i\"";

或使用qq的替代引用：

splice @lines,5,0, qq{INPUT    = "$i"};