%d

gives an integer

%o

gives an octal integer

%x

gives a hexadecimal integer

%D

gives an integer that is either octal (leading zero),

hexadecimal (leading 0x) or decimal.

%f

gives a float

%c

matches one char and returns it as an integer

%s

gives a string

%[set]

matches a string containing a given set of characters.

(thos given inside the brackets) %[^set] means any character

ecept those inside brackets. %[0-9H] means any number or 'H'.

If a * is put between the percent and the operator, the operator will not only match it's argument, not assign any variables.

Number of matched arguments is returned.