When I print some line, if I want to overwrite for example the first character, I use \r because is the carriage return character but it prints only one character after this one, my whole line is overwritten.
This is some code that I made for this question.
#include <stdio.h>
int main(){
printf("-------");
printf("\r ");
return 0;
}
using this code my output is: with one space.
Now I change a little bit the code. The only change is that in my second printf I delete the space after \r
#include <stdio.h>
int main(){
printf("-------");
printf("\r");
return 0;
}
using this second code my output is "-------" (without quotes)
my expected output: " ------"
Why this is not working?
\r is Carriage Return. It sends the "carriage" (cursor, in modern times) back to the beginning of the same line. It does not by itself erase anything--just moves the cursor. Apparently your terminal has the behavior that printing a character at the beginning of a line erases the rest of the line. That's not guaranteed, I think.
On many systems if you want to clear the current line you must print \r followed by as many spaces as the line had characters on it.