Printing dynamic value in C

I have a program that transfers a file written in C. I wanted to give the user some feed 开发者_StackOverflow中文版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!

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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).

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Use \r instead of \n.

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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