Don't worry about the display being a little off the mark, we will cover the formatting in the next lesson. For now let's practice retrieving some user input using PERL. Let's take this example one step further
xinput(1) xkbbell(1) xkbcomp(1) xkbprint(1) xkbvleds(1) xkbwatch(1) xkibitz(1) xkill(1) xload(1) xlock(1) xlogo(1) xlsatoms(1) xlsclients(1) xlsfonts(1) xlswins(1) xmag(1) xmag_multivis(1) xmakemap(1) xman(1) Xmark(1) xmkmf(1) xml2-config(1) xml2ag(1) xml...
"username","password", {'RaiseError'=>1});my$sth=$dbh->prepare("SELECT * FROM users");$sth->execute();while(my$row=$sth->fetchrow_hashref()) {print"User:$row->{name}, Age:$row->{age}\n";
» man pages section 1: User Commands » User Commands » perlsub Updated: July 2014man pages section 1: User Commands Document Information Using This Documentation Introduction User Commands 7z(1) 7za(1) 7zr(1) a2p(1) a2ps(1) aafire(1) aalib-config(1) accessx(1) acctcom(1) ...
open(my $fh, '<', 'input.txt') or die "Cannot open file: $!"; while (my $line = <$fh>) { print $line; } close($fh); # 文件写入示例 open(my $fh, '>', 'output.txt') or die "Cannot open file: $!"; print $fh "This is a test.\n"; ...
ADO using the ODBC style call procedure\_name(). An example for calling a procedure is <pre IsFakePre="true" xmlns="https://www.w3.org/1999/xhtml">my $sth = $dbh->prepare("{call procedure name (?)}");</pre> Parameters can be either input or output parameters. Parameters are ...
2@userinput= <STDIN> 3foreach(@userinput) { 4print; 5} 17. Redirection 解释:standard input(标准输入) 不仅可从键盘输入,而且可以通过再定向,从文件或者系统标准输出转到Perl的标准输入,用“ < ” 或者 “ | ”。例如: ./shotext.pl < /etc/password ...
Below is a code to get user input and store in a variable:Program/Source Code:File name: index.pl#Getting data from a user in Perl print "what is your name? \n"; $x = <STDIN>; print "Welcome Mr $x"; Output:what is your name? Godwill Welcome Mr Godwill The user input could...
&error ("Invalid input") unless &valid($input); $i *= 2 unitl $i > $j; print "", ($n += 2) while $n <10; &greet($_) foreach @person; The Naked Block 控制结构 被称为“裸的”块是指没有关键字或条件的块。假如有一个 while 循环,大致如下: ...
$input = ; 下面的例子使用命令w的输出来列出当前登录的所有用户名。 1 : #!/usr/local/bin/perl 2 : 3 : open (WOUT, "w|"); 4 : $time = <WOUT>; 5 : $time =~ s/^ *//; 6 : $time =~ s/ .*//; 7 : ; # skip headings line ...