If the format is exhausted while arguments remain, the excess arguments are evaluated but are otherwise ignored. Conversions can be applied to the nth argument after the format in the argument list, rather than to the next unused argument. The format is a wide-character string composed of zero or more directives. An optional non-zero decimal integer that specifies the maximum field width. L indicating the size of the receiving object.
L appears with any other conversion wide-character, the behaviour is undefined.
A conversion wide-character that specifies the type of conversion to be applied. The valid conversion wide-characters are described below. If a directive fails, as detailed below, the function returns. A directive that is an ordinary wide-character is executed as follows. A directive that is a conversion specification defines a set of matching input sequences, as described below for each conversion wide-character.