Non-Blocking-Input And Overwriting-Output

**Geolingo** · 10-28-2003

Ok, here is my 2 part question.

How do i set cout (preferably) to overwrite previous text. eg:

Code:

std::cout << "i like bob" << std::endl;
std::cout << "i hate";

i want to print out: "i hate bob\n". Each line overwriting previous console text.

Second Part: Non-Blocking-Input.
If that title makes no sense, dont worry, i made it up because i couldnt think of a better name for it. I want to get a keypress, IF there is a keypress, and NOT halt the program to wait for one. If there is a better term for this please let me know. Would a local keyhook do this for me? If there is an easier not-so-platform-specific way to get this style of input, please tell me all you know.

As always, thanks for your time.

**Hammer** · 10-28-2003

Part 1:

Code:

#include <iostream>

int main(void)
{
  std::cout << "i like bob" <<std::flush;
  std::cout << "\ri hate";
  return(0);
}

Better ways to do this are going to be compiler dependant. In fact, this goes for part 1 and part 2.

Part 2:
If you have kbhit(), use it. Else, post your compiler details.

**Geolingo** · 10-28-2003

Your right, im sorry, i should add it to my signature because i never bother to post it. Im running MS VC++ 6.0 on my 2k workstation, and on the other video input im running FreeBSD 4.8, with gcc 2.95.4.

What does std::flush do?

Can you provide a simple example of kbhit?

**Hammer** · 10-28-2003

std::flush simply flushes the output stream. std::endl does this too, but it also moves the cursor to the next line, which you didn't want to do.

As for kbhit(), just do a search

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Non-Blocking-Input And Overwriting-Output

your right.