来个简单的：
#!/bin/sh
files=$(ls *.c)
for file in $files; do
echo "delete $file ?(y/n)"
read ans
if [ "$ans" = "y" -o "$ans" = "Y" ]; then
rm -f $file
elif [ "$ans" = "n" -o "$ans" = "N" ]; then
echo "skip $file"
else
echo "bad answer fro $file"
fi
done
CCC=`ls -al`
echo 'CCC='$CCC
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