Left-pad printf with spaces

Question

How can I pad a string with spaces on the left when using printf?

For example, I want to print \"Hello\" with 40 spaces preceding it.

Also, the string I want

Answer 1

I use this function to indent my output (for example to print a tree structure). The indent is the number of spaces before the string.

void print_with_indent(int indent, char * string)
{
    printf("%*s%s", indent, "", string);
}