是否有perl模块将数字转换为字母,反之亦然？
例如
1 = A 2 = B 3 = C ... 27 = AA 28 = AB 29 = AC ... 53 = BA 54 = BB 55 = BC
等等等等.
解决方法
此代码显示了一个功能a2n,可以满足您的需要
use strict;
use warnings;
printf "%2s = %d\n",$_,a2n($_) for qw/ A B C AA AB AC BA BB BC /;
sub a2n {
my $n = 0;
$n = $n * 26 + $_ for map { ord($_) & 0x1F } split //,shift;
$n;
}
产量
A = 1 B = 2 C = 3 AA = 27 AB = 28 AC = 29 BA = 53 BB = 54 BC = 55
相应的n2a看起来像这样
sub n2a {
my ($n) = @_;
my @a;
while ($n > 0) {
unshift @a,($n-1) % 26;
$n = int(($n-1)/26); #Edited for failing corner case
}
join '',map chr(ord('A') + $_),@a;
}