#!/bin/bash

TABLE=$1

while [ "$cmd" != "exit" ]
do
    read cmd column1 column2 column3

    if [ "$cmd" == "add" ]
        then
        printf "Name = "
        read column1
        printf "Last Name = "
        read column2
        printf "Grade = "
        read column3
        echo $column1 $column2 $column3>>$TABLE
        fi

    if [ "$cmd" == "find" ]
        then
        printf "Name = "
        read column1
        printf "Last Name = "
        read column2
        printf "Grade = "
        read column3
            grep -i $column1 $column2 $column3  $TABLE
    fi

        if [ "$cmd" == "delete" ]
        then
        printf "Name = "
        read column1
        printf "Last Name = "
        read column2
        printf "Grade = "
        read column3
        cat $TABLE | fgrep -v -F $column1 $column2 $column3
        fi
        if [ "$cmd" == "print" ]
    then
        cat $TABLE |column -t
        fi
done
exit 0