What would be the format string for sprintf/printf for integers to separate digits with spaces?

Question

Programming

You need to get a string like this: "1 234 567" out of the number 1234567.
How to do this with printf/sprintf, what should be the format string?

Answer 1

Yes, it seems impossible ... Only manually write such a thing

void recursive_print(int number)
{
    int low_part = number % 1000;
    int high_part = number / 1000;
    if (high_part)
    {
        recursive_print(high_part);
        printf(" ");
    }
    printf("%d", low_part);
}