下列代码样例中,哪个存在错误:() A: forfilename in $(ls)do cat $filenamedone B: for((i=0;i<10;i++))do echo $idone C: x=1sum=0while [ $x -le 10 ]do let sum=sum+$x let x=x+1doneecho\ $sum D: for $i in 1 2 3 4 5do echo $idone
下列代码样例中,哪个存在错误:() A: forfilename in $(ls)do cat $filenamedone B: for((i=0;i<10;i++))do echo $idone C: x=1sum=0while [ $x -le 10 ]do let sum=sum+$x let x=x+1doneecho\ $sum D: for $i in 1 2 3 4 5do echo $idone
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