shell输出a-z，A-Z，0-9

#!/bin/bashi=97;while [ $i -lt 123 ] do s=`printf "%x" $i` s="//x$s" printf $s #d=`printf $s` #echo $d let i+=1doneecho ""i=65;while [ $i -lt 91 ] do s=`printf "%x" $i` s="//x$s" printf $s #d=`printf $s` #echo $d let i+=1doneecho "" for((k=0;k<10;k++))doprintf $kdoneecho "" 

 

上面运行结果：

 

 

 

abcdefghijklmnopqrstuvwxyz

ABCDEFGHIJKLMNOPQRSTUVWXYZ

0123456789