replacing console output

i want to display a timer in C with sleep function,but the problem is that I want to display the remaining time and then overwrite it after 1 second.How can i overwrite a number that i have already
dsplayed it on the console and then replace it with another diget?
I am working in gcc.

but when it go to single digit, the units digit is replaced with 0 and the actual unit digit shifts to tens position.like to go from 10 to 9, it turns into 90!

Hi, I am new to the board :)
Anyway, you could always do a check for timer. If it's < 10 you print 0%d (that's a zero). If it's > 10, you print %d...

Code:

---

'
do {
  if (timer < 10) {
    printf( "\r0%d", timer );
  } else {
    printf( "\r%d", timer );
  }
 '

---

Or you could do it the easy way:

>>printf ("%02d\n", 1);

The 02 means a minimum field width of 2, filled with leading zeros.