are enums integers in ANSI?

[David Lai]

C: A Reference Manual (Harbison and Steele) says:

	Draft Proposed ANSI C and most current implementations mandate
	that all enumeration types be treated as integer types, and that
	all enumeration constants appearing in expressions have type int.

Does this mean:

	int a;
	enum { abc, def} b;
	enum {ghi, jkl} c;

	b=a;
	a=b;
	a=abc;
	c=abc;
	b=c;

are legal, or are explicit casts necessary?  The sun compiler likes
to complain, will ANSI compilers complain?

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David Lai (vedge!lai at larry.mcrcim.mcgill.edu || ...watmath!onfcanim!vedge!lai)