program console output using C

xrado · 04-04-2005, 10:45 AM

lets say i print this out ...

printf("S1 : %d\n", s1);
printf("S2 : %d\n", s2);
printf("S3 : %d\n", s3);

now how do i print them out again, without using new lines
i just wana update (again and again) values (s1-s3) printed out befour on same screen location

i hope you understand me

Duo · 04-04-2005, 12:25 PM

Hmm? How do you mean? Like, should output resemble :

S1 : blah S2 : blah S3 : blah

?

or do you want to just use one printf to output them?

I think

printf ("S1 : %d\t S2 : %d \t S3 : %d\n", s1, s2, s3);

should do it. presumably being printed out again and again as part of a loop?

sorry if I have misunderstood the question. =/

mcosta · 04-04-2005, 12:52 PM

For complex operations on screen (not a simple stream) you need, for example, aalib. The function to move to a position is aa_gotoxy(). But you need a *aa_context, you can create it with aa_autoinit().

xrado · 04-04-2005, 01:39 PM

Quote:

Originally posted by Duo
Hmm? How do you mean? Like, should output resemble :

S1 : blah S2 : blah S3 : blah

?

or do you want to just use one printf to output them?

I think

printf ("S1 : %d\t S2 : %d \t S3 : %d\n", s1, s2, s3);

should do it. presumably being printed out again and again as part of a loop?

sorry if I have misunderstood the question. =/

no, i dont want new values to be printed in new lines
i just want update the line i printed once

thx anyway

__J · 04-04-2005, 01:43 PM

something like this?

Code:

#include <stdio.h>
#include <unistd.h>

int main(int argc, char **argv)
{

    int input1, input2;
    input1 = 10;
    input2 = 20;
    int counter = 0;

    while ( counter <= 100 ) {
        fprintf(stderr, "\r");
        fprintf(stderr, "#1: %d   #2: %d", input1++, input2++);
        sleep(1);
        counter++;
    }
    printf("\n");
    return 0;
}

xrado · 04-04-2005, 02:48 PM

yes, thats it..thx!