一旦发现一个完美数字，你的程序需要将该数字显示到屏幕上。

Whenever it identifies a perfect number, your program should display that number on the screen.

youdao

正如我们之前学习到的，很多命令，比如ls，将它们的结果显示到屏幕上。

As we have seen, many commands such as ls print their output on the display.

youdao

正如我们之前学习到的，很多命令，比如ls，将它们的结果显示到屏幕上。

As we have seen, many commands such as ls print their output on the display.

youdao