subtraction between unsigned ints

[Doug Gwyn]

In article <12570023 at hpclwjm.HP.COM> walter at hpclwjm.HP.COM (Walter Murray) writes:
-Doug Gwyn writes:
->In article <KURO.89Sep5111940 at shochu.Sun.Com> kuro at shochu.Sun.Com (Teruhiko Kurosaka - Sun Intercon) writes:
->>Does pANSI defines the datatype of the result of subtraction
->>between unsigned integers?  Would it be also unsigned?
->Yes, the type of the result of any arithmetic combination of operands
->having a single arithmetic type is the same type as that of the operands.
-But note that the usual arithmetic conversions are still performed.
-So if s1 and s2 have type short int, for example, the expression
-(s1+s2) has type int, not short int.

Yes, I was trying to put it succinctly.  What I described was strictly
accurate only for arithmetic types that don't undergo the usual arithmetic
conversions when combined with other operands of their own type.  Unsigned
int is one of those.