卖瓜。以自己是卖家的立场上设定程序，是要卖瓜还是退瓜还是预览自己的列表还是直接退出程序。如果选的是卖瓜，要在程序的提示下输入瓜的重量，程序会因此出现列表，分别是瓜的总重量、已卖瓜的总数量以及瓜的总价钱。-Praises. To stand on their own set-up process is the seller, is to retire praises or melon or preview your own list or exit the program. If the election is the proud parent, the weight to be entered at the prompt melon program, the program would therefore appear list, respectively, of the total weight of the melon, the total number and the total price has praises melon.