how to write into the terminal to lines above by printf()?

[davenull]

hey,
how can I write into the terminal to lines above using printf() format strings?

e.g., by
"\n" I get a new line below
"\t" is a tab space to the right
"\r" is supposed to be back to the start of the current line ...

but which formatting command do I have to use if I want to write into some former lines, already been written some lines above, to overwrite them?
(My C program is opening the LX Terminal, Raspbian Jessie)

[jojopi]

Perhaps you did want to use ncurses after all. It makes this kind of task easier and more portable.

In most terminals, the escape sequence to move the cursor up is the same as that generated by the up arrow key: "\033[A". You can specify a count by adding decimal digits between [ and A. Or to move to a specific location, "\033[y;xH".

For more information, see: http://rtfm.etla.org/xterm/ctlseq.html

[davenull]

thank you, I'll try that ASAP!

[davenull]

works like a charm!
Thank you very much!

Code: Select all

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include <stdint.h>


//*************************************************************
// main
//*************************************************************

#define cursup    "\033[A"
#define curshome  "\033[0;0H"


int main() {
    char  sbuf[128];
   
     printf("\n");
     printf("1\n");
     printf("2\n");
     printf("3\n");
     printf("4\n");
     printf("5\n");
     printf(cursup);
     printf(cursup);
     printf("4 new");
     printf(curshome);
     printf("0 new");
     
     int c = getchar();
          
     exit(0);
}