In general, any mathematical expression accepted by C, FORTRAN,
Pascal, or BASIC is valid. The precedence of these operators is
determined by the specifications of the C programming language.
White space (spaces and tabs) is ignored inside expressions.
Complex constants may be expressed as the {<real>,<imag>}, where <real>
and <imag> must be numerical constants. For example, {3,2}
represents 3 + 2i; {0,1} represents i itself. The curly braces
are explicitly required here.
Subsections