Re: Locating keypress

Posted by Joey *DClub* on August 15, 2004

In Reply to: Re: Locating keypress posted by DelphiLand Team on August 14, 2004

: : Heya... i known this forum is for GUI but i was wondering if i could ask a quick question about console applications...

: : How can i capture a key press?? As in... if the user presses the 'J' key then i can mask it with a '*' after adding it to a variable.

: : Thanks, Joey ^__^

: : P.S. How come my numbers come up after my name and *DClub* like other people??
: -------------------------------------

: In a console application, Read(var) waits for the user typing a character on the keyboard. So you can code it as follows:

: var
: C: Char;
: ....
: begin
: ...
: // Program waits here until a key is pressed
: // the corresponding character is placed in C
: Read(C);
: // Do something depending on C :
: if C = 'a' then ...
: else if C = 'b' then ...
: else ...
: ...
: end;

: On the other hand, ReadLn(var) waits for the user typing a string and ending it with "ENTER", so for VAR you use a string variable. Example:

: var
: S: string;
: ....
: begin
: ...
: // Program waits here until ENTER key
: // is pressed
: ReadLn(S);
: // Do something with S :
: ...
: end;

: Regards,
: the DelphiLand Team

: PS: From time to time, we process the forum messages and we replace the membership-id's with *DClub*, meaning "DelphiLand Club" :)

Thanks very much!! i thort Read() waited for the user to press enter aswell and then discarded the #13#10 from the line so a new line wasnt created :) now i understand the difference between Read and ReadLn more than i did :)

Thanks, Joey ^__^


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