#函数中也可以使用位置参数!#函数是有返回结果的!#!/bin/bashshow_week(){ echo -n "your input is :" echo "$1" case $1 in #变量是$1 1) echo "Today is Monday" ;; 2) echo "Today is Tuesday" ;; 3) echo "Today is Wednesday" ;; *) echo "I do not know" ;; esac}if show_week "$1" #函数调用参数,参数是$1then echo "What you input is right" #函数执行结果返回0else echo "what you input is wrong" #函数执行结果返回1fiexit 0[root@server100 test]# ./fun5.sh 1your input is :1Today is MondayWhat you input is right