Fill printf for lines at 0

Question

Is there a way to replace the space character with 0 in the printf fingerprint for the field width

Code used

printf("%010s","this"); 

It doesn't seem to work for strings!

Answer 1

Indeed, flag 0 only works for numerical conversions. You will have to do this manually:

 int print_padleftzeroes(const char *s, size_t width) { size_t n = strlen(s); if(width < n) return -1; while(width > n) { putchar('0'); width--; } fputs(s, stdout); return 0; } 

Answer 2

What about

  test="ABCD" printf "%0$(expr 9 - ${#test})d%s" 0 $test 

which will give you what you need.

  ~:00000ABCD 

or do you want the padd with other numbers to just change

  printf "%0$(expr 9 - ${#test})d%s" 1 $test 

will provide you

  ~:11111ABCD 

Answer 3

Try the following:

 printf("%010d%s", 0, "this");