PHP
·
发表于 5年以前
·
阅读量:8410
#!/bin/bash
# passing parameters to a function
function addem {
if [ $# -eq 0 ] || [ $# -gt 2 ]
then
echo -1
elif [ $# -eq 1 ]
then
echo $[ $1 + $1 ]
else
echo $[ $1 + $2 ]
fi
}
echo -n "Adding 10 and 15:"
value=`addem 10 15`
echo $value
echo -n "Let's try adding just one number: "
value=`addem 10`
echo $value
echo -n "Now trying adding no number: "
value=`addem`
echo $value
echo -n "Finally, try adding three or more numbers: "
value=`addem 10 15 20`
echo $value