bash中if條件語句的使用及bash返回值的注意事項
阿新 • • 發佈：2019-02-13
#!/bin/bash
#bash函式以及返回值的注意事項
function showgrade(){
if [ ! -z "$1" ];then
echo "Your grade is $1"
else
echo "Invalid call $FUNCNAME"
fi
}
#學生成績分類
echo "Please input a integer(0-100)"
read score
if [ "$score" -lt 0 -o "$score" -gt 100 ];then
echo "The score what you input is not a valid score."
#bash的最大返回值是255，==256則返回0,
#如果返回值是1000則，實際返回值是1000%256 = 232
exit 100
else
if [ "$score" -ge 90 ];then
showgrade "A"
else
if [ "$score" -ge 80 ];then
showgrade "B"
else
if [ "$score" -ge 70 ];then
showgrade "C"
else
if [ "$score" -ge 60 ];then
showgrade "D"
fi
fi
fi
fi
fi
#bash函式以及返回值的注意事項
function showgrade(){
if [ ! -z "$1" ];then
echo "Your grade is $1"
else
echo "Invalid call $FUNCNAME"
fi
}
#學生成績分類
echo "Please input a integer(0-100)"
read score
if [ "$score" -lt 0 -o "$score" -gt 100 ];then
echo "The score what you input is not a valid score."
#bash的最大返回值是255，==256則返回0,
#如果返回值是1000則，實際返回值是1000%256 = 232
exit 100
else
if [ "$score" -ge 90 ];then
showgrade "A"
else
if [ "$score" -ge 80 ];then
showgrade "B"
else
if [ "$score" -ge 70 ];then
showgrade "C"
else
if [ "$score" -ge 60 ];then
showgrade "D"
fi
fi
fi
fi
fi