#!/usr/bin/perl use strict; use warnings; my %pins; # 存储pin信息的哈希表 while (<DATA>) { chomp; if (/pin\s+\((\w+)\)\s*\{/) { # 匹配到了pin，开始构建该pin的哈希表 my $pin_name = $1; $pins{$pin_name} = { }; } elsif (/related_pin\s*:\s*(\w+)/) { # 匹配到了related_pin信息，存储到该pin的哈希表中 my $related_pin = $1; $pins{$pin_name}->{'related_pin'} = $related_pin; } elsif (/timing_type\s*:\s*(\w+)/) { # 匹配到了timing_type信息，存储到该pin的哈希表中 my $timing_type = $1; push @{$pins{$pin_name}->{'timing'}}, { 'timing_type' => $timing_type }; } elsif (/when\s*:\s*"([^"]+)"/) { # 匹配到了when信息，存储到该pin的哈希表中 my $when = $1; my $timings = $pins{$pin_name}->{'timing'}; my $last_timing = $timings->[-1]; $last_timing->{'when'} = $when; } } # 输出pin信息的哈希表 foreach my $pin_name (keys %pins) { print "Pin: $pin_name\n"; my $pin_info = $pins{$pin_name}; foreach my $timing (@{$pin_info->{'timing'}}) { print " Related Pin: $pin_info->{'related_pin'}\n"; print " Timing Type: $timing->{'timing_type'}\n"; print " When: $timing->{'when'}\n" if exists $timing->{'when'}; } } __DATA__ pin (CLKA) { timing { related_pin : CLKB; timing_type : hold; when : "!RET"; } timing { related_pin : CLKB; timing_type : hold; when : "!RET"; } } pin (CLKB) { timing { related_pin : CLKB; timing_type : hold; when : "!RET"; } } 这段代码有编译错误，请解决！

这段代码的问题在于，变量 `$pin_name` 在第一个 `if` 语句中被声明并赋值，但在后续的 `elsif` 语句中使用了该变量，导致编译错误。解决方法是将 `$pin_name` 的声明和赋值提到 `elsif` 语句之外，或者在 `elsif` 语句中使用 `my` 重新声明 `$pin_name` 变量。

以下是修改后的代码：

#!/usr/bin/perl
use strict;
use warnings;

my %pins;  # 存储pin信息的哈希表

my $pin_name; # 修复变量声明问题

while (<DATA>) {
    chomp;
    if (/pin\s+\((\w+)\)\s*\{/) {
        # 匹配到了pin，开始构建该pin的哈希表
        $pin_name = $1;
        $pins{$pin_name} = { };
    } elsif (/related_pin\s*:\s*(\w+)/) {
        # 匹配到了related_pin信息，存储到该pin的哈希表中
        my $related_pin = $1;
        $pins{$pin_name}->{'related_pin'} = $related_pin;
    } elsif (/timing_type\s*:\s*(\w+)/) {
        # 匹配到了timing_type信息，存储到该pin的哈希表中
        my $timing_type = $1;
        push @{$pins{$pin_name}->{'timing'}}, { 'timing_type' => $timing_type };
    } elsif (/when\s*:\s*"([^"]+)"/) {
        # 匹配到了when信息，存储到该pin的哈希表中
        my $when = $1;
        my $timings = $pins{$pin_name}->{'timing'};
        my $last_timing = $timings->[-1];
        $last_timing->{'when'} = $when;
    }
}

# 输出pin信息的哈希表
foreach my $pin_name (keys %pins) {
    print "Pin: $pin_name\n";
    my $pin_info = $pins{$pin_name};
    foreach my $timing (@{$pin_info->{'timing'}}) {
        print "  Related Pin: $pin_info->{'related_pin'}\n";
        print "  Timing Type: $timing->{'timing_type'}\n";
        print "  When: $timing->{'when'}\n" if exists $timing->{'when'};
    }
}

__DATA__
pin (CLKA) {
    timing {
        related_pin : CLKB;
        timing_type : hold;
        when : "!RET";
    }
    timing {
        related_pin : CLKB;
        timing_type : hold;
        when : "!RET";
    }
}
pin (CLKB) {
    timing {
        related_pin : CLKB;
        timing_type : hold;
        when : "!RET";
    }
}