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???
05/25/05 17:24
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 		 #93898 - Looks the same to me
Responding to: ???'s previous message
Donald Catto said:
"Neil's point is that, although pointers & arrays are different, they both use the same Notation."

No. He states that "pointer notation and array notation are interchangeable". He does not state that "[pointers and arrays] use the same notation", which is even less correct, if it is possible to have a state of 'less correct'.


By "Notation," I'm thinking of:

  • The value of an array name is the address of the start of the array; The value of a pointer is the address of the start of the pointed-to object.

  • The index-offset operator [] may be applied to a pointer as well as an array name.

  • The dereference operator * may be applied to an array name as well as a pointer.
    Save This Code
    void main( void )
{
    char  my_array[] = "Array";
    char *my_pointer = "Pointer";

    char my_char;

    my_char = my_array[0];
    my_char = my_pointer[0];

    my_char = *my_array;
    my_char = *my_pointer;

}


    The differences lie in the behaviour:

  • Defining an array allocates storage for the array elements.

  • You cannot assign to an array name.



    • List of 27 messages in thread
    TopicAuthorDate
    Unions in C            01/01/70 00:00      
       You miss the point completely...            01/01/70 00:00      
       Easy with Union            01/01/70 00:00      
          You can see from the Raghu example...            01/01/70 00:00      
             Platform-dependence            01/01/70 00:00      
                Padding in unions            01/01/70 00:00      
                   portability            01/01/70 00:00      
          array=pointer...?            01/01/70 00:00      
             array != pointer            01/01/70 00:00      
             Quirk of C            01/01/70 00:00      
                Read the FAQ            01/01/70 00:00      
                   Read the Comment            01/01/70 00:00      
                      Read everything            01/01/70 00:00      
                         Looks the same to me            01/01/70 00:00      
                            This One            01/01/70 00:00      
                            That's the problem            01/01/70 00:00      
                               Good example            01/01/70 00:00      
                                  No fun            01/01/70 00:00      
                                     Well...            01/01/70 00:00      
                                     Of course it does!            01/01/70 00:00      
                                        Hmm            01/01/70 00:00      
                            Actually, even less.            01/01/70 00:00      
                               const pointer            01/01/70 00:00      
       O.K you win            01/01/70 00:00      
          Please conclude            01/01/70 00:00      
             Not Exactly            01/01/70 00:00      
             End of wrong stick?            01/01/70 00:00      

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