1 the computer displays some secret word(in underscore):---
2 I guess letter"c"in the word
3 yes,the screen pops up like this :c--
4 I guess the second letter is u
5 yes , it is :cu-
6 last ,I guess the final one is p
7 yes , it is :cup
WHICH FUNCTION SHALL I USE TO MAKE THIS HAPPEN?
The topic will be asked in tomorrow , could anyone give me some hint or related example?