CODEWITHSUNDEEP
csystems-programming
Sandeep Singh
Sandeep Singh

Reputation: 5191

How to Emulate a Dynamic Display in C Code

I have written a code which can convert any Input Integer to equlivalent LED Display. I want to pass my system's time as an Input to this Function and get an LED Display for the same.

Example: Consider these 2 Inputs:

(system time = 10:12:00)
(system time = 11:10:04)

Problem:

The Screen Output should Overwrite the Previous Output for "10:12:00" with "11:10:04" such that the application user should get a feeling of an 'Inplace' Dynamic Display.

Requesting you to please provide some hint on how to achieve this in "C" Code. (My platform is GNU/Linux)

Thanks.

Best Regards,

Sandeep Singh

Upvotes: 0

Views: 199

Answers (2)

Jerry Coffin
Jerry Coffin

Reputation: 490308

The usual way is something like:

printf("\r%s", time_string);

As far as getting the time as a string, you can retrieve the time with time(), convert to local time broken down into fields with localtime, and put a format of your choice in a string with strftime.

Upvotes: 2

Pierre
Pierre

Reputation: 35276

write your string and then as much backspaces ('\b') as needed to erase this string before writing another one.

Upvotes: 1

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