linux 如何制作字符菜单

#!/bin/bash

# 定义菜单选项
options=("Option 1" "Option 2" "Option 3" "Exit")

# 初始化变量
selected=0

# 显示菜单
display_menu() {
    clear
    for ((i=0; i<${#options[@]}; i++)); do
        if [[ $i -eq $selected ]]; then
            echo -e "\e[1;33m$i)\e[0m ${options[$i]}"
        else
            echo "$i) ${options[$i]}"
        fi
    done
}

# 处理用户输入
while true; do
    display_menu
    read -rsn1 key
    case $key in
        A) ((selected > 0 && selected--));;
        B) ((selected < ${#options[@]}-1 && selected++));;
        "\n") break;;
    esac
done

# 执行选中的选项
case $selected in
    0) echo "You selected Option 1";;
    1) echo "You selected Option 2";;
    2) echo "You selected Option 3";;
    3) echo "Exiting..."; exit 0;;
esac