perl读写文件代码实例
发布时间：2020-12-15 21:56:35 所属栏目：大数据 来源：网络整理
导读：#mode operand create truncate #read #write yes yes #append yes Case 1: Throw an exception if you cannot open the file: 复制代码 代码如下: use strict; use warnings; my $filename = 'data.txt'; open(my $fh,':encoding(UTF-8)',$filename) or die
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#mode operand create truncate Case 1: Throw an exception if you cannot open the file: 复制代码 代码如下: use strict; use warnings; my $filename = 'data.txt'; open(my $fh,'<:encoding(UTF-8)',$filename) or die "Could not open file '$filename' with the error $!"; while (my $row = <$fh>) { chomp $row; print "$rown"; } close($fh); Case 2: Give a warning if you cannot open the file,but keep running: 复制代码 代码如下: use strict; use warnings; my $filename = 'data.txt'; if (open(my $fh,$filename)) { while (my $row = <$fh>) { chomp $row; print "$rown"; } close($fh); } else { warn "Could not open file '$filename' $!"; } Case 3: Read one file into array 复制代码 代码如下: use strict; use warnings; my $filename = 'data.txt'; open (FILEIN,"<",$filename) or die "Could not open file '$filename' with the error $!"; my @FileContents = <FILEIN>; for my $l (@FileContents){ print "$ln"; } close FILEIN; end （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |