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Transferring Array Data/ Error Message c213

Andre Lubarsky Jr.


In trying to compile the following ( trivial to me) C code with the C51
compiler, I received error c213 "left side of asn-op not an lvalue" -
" the address of a changeable object is required at the right side of the
assignment operator".

Code:
unsigned int A[8];
unsigned int B[8];
unsignned int i;

for (i = 0; i = 7; i++)
A[i] = B[i]; /* error here */

Is it the compiler or the code???

Any help or comments appreciated.

Thanks

Andy

  • 0

    The following code seems to work OK:

    void main (void)
{
unsigned int A[8];
unsigned int B[8];
unsigned int i;

for (i = 0; i < 8; i++)
  {
  A[i] = B[i]; /* error here */
  }
}

    In your code, there are few problem that prevent testing:

    1. unsignned int i: I assume this is really unsigned.

    2. for (i = 0; i = 7; i++): The middle expression of a for statement should be a comparison, not an assignment.

    Keil Support

  • 0 

    unsigned int A[8];
unsigned int B[8];
unsignned int i;

for (i = 0; i = 7; i++)
A[i] = B[i]; /* error here */

    There is a typo in your 3rd line: 
    unsignned int i
    Did the compiler report an error on this line?

    It seems to be a "feature" of the Keil compiler that it will report this error (C213) on every line containing an array reference after any other error has been reported on a previous line.
    Maybe Keil support could comment on this?

    In any compiled language, you should always fix the first reported error first; chances are this will also fix many of the following "errors," which were just due to the compiler getting out-of-step with your intentions.

    BTW: Check out the "Tips for Posting Messages" link in the sidebar to see how to do the code quotes, italics, bold, etc.