#!/bin/bashif[$#-eq0];thenecho"输入值不能为空"//提示不能输入空值注：$#代表环境变量个数exitfinum=$*//定义一个全局变量，方便后边的调用sum(){sum=0while[$#-gt0]dosum=$[$sum+$1]shiftdoneecho"数字$num相加的和是$sum"}cha(){cha=$1shiftwhile[$#-gt0]docha=$[$cha-$1]shiftdoneecho"数字$num相减的差是$cha"}cheng(){cheng=$1shiftwhile[$#-gt0]docheng=$[$cheng*$1]shiftdoneecho"数字$num相乘的是$cheng"}chu(){chu=$1shiftwhile[$#-gt0]dochu=$[$chu/$1]shiftdoneecho"数字$num相除的商是$chu"}read-p"请输入+|-|*|/:"typecase"$type"in"+")sum$*;;"-")cha$*;;"*")cheng$*;;"/")chu$*;;*)echo"请输入{+|-|*|/}"esac
