OS Address Book Exercise

#Author - MR
#Date - 1/24/14

echo "Rosales,Clifford,123456,crosales@guidon.com" | sed 's/,/ ~~~ /g' > addressbook
echo "Hizon,Joseph,654321,jhizon@batak.com" | sed 's/,/ ~~~ /g' >> addressbook
echo "Raymundo,Miguel,789012,mraymundo@gmail.com" | sed 's/,/ ~~~ /g' >>addressbook

until [ "$choice" == "4" ] #watch out for rookie mistakes
    do
        echo "======================"
        echo "What do?"
        echo "======================"
        echo "1. Add new record"
        echo "2. Display all records"
        echo "3. Search"
        echo "4. Exit"
        echo "======================"
        echo -n "Choice: "
        read choice
        echo

        if [ "$choice" == "1" ] #string -> "$x" == "y" --- int -> $x -eq y
        then
            echo -n "Enter last name: "
            read last
            echo -n "Enter first name: "
            read first
            echo -n "Enter contact number: "
            read number
            echo -n "Enter email address: "
            read email
            echo "$last,$first,$number,$email" | sed 's/,/ ~~~ /g' >> addressbook
            echo
            echo "~~~RECORD SUCCESSFULLY ADDED.~~~"
            echo
        elif [ "$choice" == "2" ]
        then
            cat addressbook
            echo
        #elif [ "$choice" == "3" ]
        #then
        #   echo -n "Entery query: "
        #   read query
        #   echo "$query*"
        fi
    done