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???
01/29/08 15:36
Modified:
  01/29/08 15:37
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 		 #150063 - Everything in C defaults to int, which is signed
Responding to: ???'s previous message
Esko Ilola said:
The root cause was the compiler assumptions over the constants. These are always (sic) treated as SIGNED integers if not told othervise.

Not quite always - here's the chapter & verse:

ISO/IEC 9899:1990, section 6.1.3.2, Integer Constants, said:
Semantics
The type of an integer constant is the first of the corresponding list in which its value can be represented. Unsuffixed decimal: int, long int, unsigned long int

and note that ints are implicitly signed:

ISO/IEC 9899:1990, section 6.1.2.3, said:
Types
There are four signed integer types, designated as signed char, short int, int, and long int.


If you want an unsigned constant, use the 'U' suffix...




List of 28 messages in thread
TopicAuthorDate
The art of typecasting            01/01/70 00:00      
   I'd like to disagree            01/01/70 00:00      
   two comments            01/01/70 00:00      
      Two comments on comments            01/01/70 00:00      
   The Art of correct Constants            01/01/70 00:00      
      int - number of bits unknown            01/01/70 00:00      
         Corrected Art of correct Constants            01/01/70 00:00      
         More assumptions            01/01/70 00:00      
         stdint.h            01/01/70 00:00      
            Or, in the absence of stdint.h...            01/01/70 00:00      
      Const vs #define            01/01/70 00:00      
         Opps!            01/01/70 00:00      
            which may be a reason to prefer #define over const            01/01/70 00:00      
               enum            01/01/70 00:00      
                  Varies            01/01/70 00:00      
                     Know Thy Stuff - enum            01/01/70 00:00      
                        You are right            01/01/70 00:00      
   Know Thy Stuff            01/01/70 00:00      
      And...            01/01/70 00:00      
         I'll pass(cal) on that one :)            01/01/70 00:00      
   Everything in C defaults to int, which is signed            01/01/70 00:00      
   Never overlook lint            01/01/70 00:00      
      before Steve says it...            01/01/70 00:00      
         Pascal            01/01/70 00:00      
            strong typing            01/01/70 00:00      
               why Ada never took off            01/01/70 00:00      
                  Wirth-less            01/01/70 00:00      
               Why ?            01/01/70 00:00      

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