2,3 (少于3个) Redo from start (要求重新输入) 输入边长a,b,c:? 2,3,4 (正确) (5)输入的数据,只能是常量,不能是变量 或表达式。
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修改上面的程序,在显示结果完成之后附加询问'Do you want to calculate again (y/n),如果回答'y',则要求重新输入参数,如果回答'n',程序退出(Do while 循环)。
Modify the above program such that it will ask for 'Do you want to calculate again (y/n), if you say 'y', it'll again ask the parameters. If 'n', it'll exit.
如果编写的是一个面向用户的应用程序,而且信息来自于用户输入,您需要通过一个简单的Web表单,要求用户重新输入他们的电子邮件地址。
If you write a customer-facing application and the information came through user input, you can even ask the user to re-enter their E-mail address using a simple Web form.
在您第一次重新登录到每台机器时,keychain将要求您输入密码短语。
The first time you log back in to each machine, keychain will prompt you for the passphrase.
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