linux-tutorial/codes/shell/示例脚本/脚本函数/在函数中使用参数.sh

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2019-05-10 11:17:57 +08:00
#!/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