while(my$line= <FH>){ #message("$line"); print$line; } closeFH; } submessage { my$m=shiftorreturn; print("$m\n"); } suberror { my$e=shift||'unkown error'; print("$0: $e\n"); exit0; } first setup a file named li
语句块和循环语句可以设置标号,last、redo 和 next都可以带一个标号。(等价于C的loop语句) 退出perl? exit 0;代表正常退出perl。 第4学时 基本构件的堆栈:列表与数组 填充和清空数组 逐个元素查看数组 对数组进行排序和输出 标量分割为数组 数组合并为标量 列表是常量,数组是变量,可以将列表存放在数组当中。如: ...
; print "SERVER started on port $port\n"; # accepting a connection my $client_addr; while ($client_addr = accept(NEW_SOCKET, SOCKET)) { # send them a message, close connection my $name = gethostbyaddr($client_addr, AF_INET ); print NEW_SOCKET "Smile from the server"; print "Conn...
Scripts written in Perl can implement looping, or iteration, with the while, until, and for constructs. In each case, a block of code is executed repeatedly until a loop exit condition is satisfied. The script then continues on from that point. The while Statement...
print "Please guese the number between 1 and 100: "; while(<>){ chomp if $_ ne "\n"; exit if $_==$num || /quit|exit|\n/; if($_>$num){ print "Too high, please retype: "; }elsif($_<$num){ print "Too low, please retype: "; } next; }...
exit; } } while(1); # only'quit'or^C can exit the loop } exit; #implicitexit here anyway # printoutthe help and exit sub usage { my $exit=shift @_||0; # don't exit unless explicitly told so print<first.pl [-l] [-h] [-f FILENAME] ...
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问在perl中使用Test::More进行单元和集成测试-如何捕获退出调用？EN对于测试工作而言，微服务架构对于传统...
The "continue" block, if any, is not executed: LINE: while (<STDIN>) { last LINE if /^$/; # exit when done with header ... } The "redo" command restarts the loop block without evaluating the conditional again. The "continue" block, if any, is not executed. This command is ...
while(1) { my $c = ''; print "what happened"; sysread(CLIENT, $c, 100) or die "recv: $!"; print "\nclient say:$c\n"; if ($c =~ /quit/gi) { close(CLIENT); exit; } syswrite(CLIENT, $c."back\n",100); } print "\npid:$pid\n"; ...