perl文本输出对齐

通常输出：html print "$a\t$b\n";post   向右对齐：spa   printf "%20s","1234567890\n"; printf "%20s"x@lines,@lines;htm   向左对齐：blog printf "%-20s","1234567890\n"; printf "%-20s"x@lines,@lines;字符串 固然能够用获取当前长度再填补空格的

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