怎样直接输入网址打开网站_南宁市西乡塘区疫情最新消息_西安seo排名外包_友情链接获取的途径有哪些

1.

#!/bin/bash# 读取数组
read -a arr
# 读取要查找的key
read -p "请输入要查找的key: " key
found=0
for element in "${arr[@]}"; doif [ "$element" = "$key" ]; thenfound=1breakfi
done
if [ $found -eq 1 ]; thenecho "key $key 在数组中出现"
elseecho "key $key 未在数组中出现"
fi

2.

#!/bin/bash# 读取数组
read -a arr
# 读取要查找的key
read -p "请输入要查找的key: " key
for ((i = 0; i < ${#arr[@]}; i++)); doif [ "${arr[$i]}" = "$key" ]; thenarr[$i]="hehe"fi
done
echo "修改后的数组: (${arr[@]})"

3.

#!/bin/bash# 读取数组
read -a arr
# 读取要查找的key
read -p "请输入要查找的key: " key
new_arr=()
for element in "${arr[@]}"; doif [ "$element" != "$key" ]; thennew_arr+=("$element")fi
done
echo "删除后的数组: (${new_arr[@]})"

4.

#!/bin/bash# 读取数组
read -a arr
# 读取插入下标
read -p "请输入插入下标: " index
# 读取要插入的key
read -p "请输入要插入的key: " key
arr=("${arr[@]:0:$index}" "$key" "${arr[@]:$index}")
echo "插入后的数组: (${arr[@]})"

5.

#!/bin/bash# 默认用户名和密码
yhn="admin"
ntna="1234"
yuer="10000"
ctshu="3"while [ $ctshu -gt 0 ]; doecho -n "请输入用户名:"read usernameecho -n "请输入密码: "read -s passwordecho # 换行if [ "$username" == "$yhn" ] && [ "$password" == "$ntna" ]; thenecho "登入成功"while true; doecho "......"echo "1. 账户余额"echo "2. 取款"echo "3. 存款"echo "4. 退出"echo -n "请选择操作: " # 不换行read choicecase $choice in1)echo "当前余额: $yuer";;2)echo -n "请输入取款金额: "read quezongif [ $quezong -gt $yuer ]; thenecho "账号余额不足，请重新输入"else                                                yuer=$((yuer - quezong))echo "取款成功，剩余金额: $yuer"fi;;3)echo -n "请输入存款金额: "read cuntuyuer=$((yuer + cuntu))echo "存款成功，当前余额: $yuer";;4)echo "退出系统"exit 0;;*)echo "无效选择，请重新输入";;esacdoneelsectshu=$((ctshu - 1))if [ $ctshu -gt 0 ]; thenecho "第$((3 - ctshu))次登入失败，还有$ctshu次"elseecho "第三次登入失败，账户锁定"exit 1fifi
done