bash 如何构造变量

bigbomb

很简单的例子
#read var1 var2 var3
输入 dong dong qiang
让后想用for 循环显示
#for i in 1 2 3;do echo $var$i;done
可是我怎么也构造不出$var1,$var2,$var3
请Dx赐教

happyc84

我理解错了:em11::em11:

[ 本帖最后由 happyc84 于 2007-5-23 16:08 编辑 ]

寂寞烈火

for i in 1 2 3;do eval echo \$var$i;done

waker

eval echo \$var$i

bigbomb

eval 是将echo $var$i作为一个整体来处理，还是仅对$var$i来处理
eval [arg ...]
The  args  are read and concatenated together into a single command.  This command is then read and executed by the shell, and its exit status is returned as the value of eval.  If there are no args,or only null arguments, eval returns 0.
我好糊涂！