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Message: [QUOTE="Tim Rentsch, post: 5022206"] Certainly the Standard doesn't exclude the possibility. On most implementations, a definition for EOF such as #define EOF (' ' - (__UCHAR_MAX+1)) (where __UCHAR_MAX has the same value as UCHAR_MAX, but doesn't need <limits.h>) will result in a valid value for EOF that will have the same value as space when converted to 'unsigned char'. A similar construction could produce the same value as that of any other character desired (on most implementations, ie, those where unsigned char promotes to int rather than unsigned int, and the range of int is large enough so overflow does not occur). [/QUOTE]