Code contains birnay number

I have a question on Uvsion2 IDE.
I read a Quick start manual on page 111.
It indicates that the compiler accepts
binary constant number. When I used it
on my code, the compiler did not seem to take
it. Could somebody tell me what I did
wrong here.


Here is the short test code:

char number;
main(void)
 {
  number = 111111y;   //binary number
 }

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