Perl对文件的操作，跟其它的语言类似，无非也就是打开，读与写的操作。
1. 打开文件
#! c:/perl/bin/perl -w
use utf8;
use strict;
use warnings;
my $filename = \’test.txt\’; # 或者用绝对路径,如: c:/perl/Learn/test.txt
if(open(MYFILE,$filename)) # MYFILE是一个标志
{
printf \”Can open this file:%s!\”, $filename;
close(MYFILE);
}
else{
print \”Can\’t open this file!\”;
}
2. 读取文件
#! c:/perl/bin/perl -w
use utf8;
use strict;
use warnings;
my $filename = \’test.txt\’;
if(open(MYFILE,$filename))
{
my @myfile = <MYFILE>; #如果要读取多行，用此方法，如果只读取一行为:$myfile = <>;
my $count = 0; #要读取的行数，初始值为0
printf \”I have opened this file: %s\\n\”, $filename;
while($count < @myfile){ #遍历
print (\”$myfile[$count]\\n\”); #注意此种写法.
$count++;
}
close(MYFILE);
}
else{
print \”I can\’t open this file!\”;
}
exit;
3. 写入文件
#! c:/perl/bin/perl -w
use utf8;
use strict;
use warnings;
my $filename = \’test.txt\’;
if(open(MYFILE,\”>>\”.$filename)) #此种写发，添加不删除
{ #此种写法，重写文件内容 MYFILE,\”>\”.$filename
print MYFILE \”Write File appending Test\\n\”;
close(MYFILE);
}
else{
print \”I can\’t open this file!\”;
}
exit;
