2 scan - scan standard input for possible assignment to variables
5 scan(x_1, x_2, ..., x_n)
13 When input is from a terminal, execution is halted and input is read
14 until a newline is entered. Strings of non-whitespace characters
15 are evaluated in succession and if the corresponding x_i is an lvalue,
16 the resulting value is assigned to x_i. If the number of strings
17 read exceeds n, only the first n strings are evaluated. If the number
18 of strings is less than n, the later x_i are ignored.
23 > 2+3 b=a^2 3+4i 3+"a"
28 none - XXX - is this correct?
31 none - XXX - is this correct?
34 fscan, strscan, fscanf, strscanf, scanf, printf, fprintf