Character input device and program for displaying next word candidates based on the candidates' usage history

摘要

A character input device is disclosed. The device includes a character input section including a plurality of character keys; a display section that displays an input character(s); and a next word prediction section that predicts a respective word being subsequently input in an event of input-word reception in the character input section and that displays the word as a next word candidate on the display section. The next word prediction section stores usage history information indicative of whether the next word candidate for the respective input-received word was used by a user, and determines in accordance with the usage history information of words as of a time point of the event of input-word reception of the word whether to display the next word candidate on the display section, and inhibits the display of a next word candidate when a value obtained by adding a constant to the number of used times of the candidate is smaller than the number of its unused times.