hasMon = false;
if peripheral.isPresent("top") then
    hasMon = true;
    mon = peripheral.wrap("top");
    print("Monitor was found!");
    mon.clear();
end

function printm(str)
    if type(str) ~= "string" then return end
    print(str);
    mon.write(str);
end

function add()
    printm("adding");
end
function remove()
    printm("removing");
end

function start()
    while true do
        printm("What would you like to do?");
        printm(" - Type \"add\" to add an item");
        printm(" - Type \"remove\" to add an item");
        printm(" - Type \"quit\" to save and quit");
        ans = read();
        if type(ans) == "string" then
            if ans == "add" then add() end
            if ans == "remove" then remove() end
            if ans == "quit" then
                printm("Goodbye!");
                os.shutdown();
            end
        end
    end
end

start();