idx should be a size_t.
Actually, there are historical reasons why `int` may be used. Look at the definition of the %n format specifier - it expects an `int *` argument. And all of the famirly functions return `int`'s ... see also:
https://stackoverflow.com/q/45740276/1593077
alt Hacker News
Actually, there are historical reasons why `int` may be used. Look at the definition of the %n format specifier - it expects an `int *` argument. And all of the famirly functions return `int`'s ... see also:
https://stackoverflow.com/q/45740276/1593077