8 Prompting for Input

8.1 Some simple dialogs

The simplest form of dialog is a message dialog. The function display-message behaves very much likeformat.

(display-message "Hello world")

Figure 8.1 A message dialog

(display-message
             "This function is ~S"
             'display-message)

Figure 8.2 A second message dialog

Another simple dialog asks the user a question and returnst ornil depending on whether the user has chosen yes or no. This function is confirm-yes-or-no.

(confirm-yes-or-no
    "Do you own a pet?")

Figure 8.3 A message dialog prompting for confirmation

CAPI User Guide, Liquid Common Lisp Version 5.0 - 2 OCT 1997

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