Variable length space using printf

I'm trying to format some printf statements to allow for arbitrary levels of indentation. Ideally I want the fol开发者_运维技巧lowing output where "One", "Two", etc are placeholders for variable length log messages.

One
 Two
  Three
 Two
One

I'm working on the variable length spacing required for the indentation, and I know I can do the following:

printf( "%*s", indent_level, "" );

but I'm wondering if there's a way to do it without the second empty string arg.

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You can just pass as a parameter what you want to printout:

printf( "%*s", indent_level + strlen(mystr), mystr );

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Can't write a comment for some reason, so posting as a separate necro-answer.

>> "Of course, if the first parameter is also variable-length, then this won't work for you"

> Yeah, that's the case; it needs to be able to handle a numeric value as the first param.

You can use a dud string

printf ("%*s%d", indent_level, "", decimal);

in order to indent variable-length decimals. A bit clunky, but works.