CODEWITHSUNDEEP
c
eggman20
eggman20

Reputation: 73

Printing dynamic value in C

I have a program that transfers a file written in C. I wanted to give the user some feed back on how much bytes and/or percentage has been transferred. My codes does something like this:

Transferring......100 bytes.
Transferring......200 bytes.
Transferring......300 bytes.
Transferring......400 bytes.
Transferring......500 bytes.
Transferred Complete!!!

As you can see, if I transfer a large file it'll print a bunch of lines. Is it possible to have the number of bytes updates and change without printing another line?

Thanks in advance guys!

Upvotes: 1

Views: 351

Answers (3)

Dominik Seibold
Dominik Seibold

Reputation: 2469

If you're writing a win32 application, you can manipulate the position of the cursor with the SetConsoleCursorPosition(HANDLE, COORD) method to overwrite specific characters:

http://msdn.microsoft.com/en-us/library/ms686025(v=VS.85).aspx

Upvotes: 0

Marcelo Cantos
Marcelo Cantos

Reputation: 185852

Use \r instead of \n.

Upvotes: 0

caf
caf

Reputation: 239041

There's no way to do this generically in standard C - after all, the output of your program might be going directly to a line printer.

However, on many terminals you can print a \r character to return the cursor to the beginning of the current line (or print a number of \b backspace characters to erase characters one-by-one).

Upvotes: 2

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