> 	I'm in your prog. langs. class.  I have a question about a 
> homework problem.  I think the problem is problem 2.2. It's this one:
> 
> 	a+++++b;
> 
> I think I know what this is supposed to do:
> 	Increment b;
> 	Add a and b;
> 	Increment a;
> 	
> I decided to code this up.  Just to make sure...
> 
> compiler 'cc' gave me this error:  illegal lhs of assignment operator
> compiler 'gcc' gave me this error: invalid lvalue in increment
> 
> I think my code is correct.  Is this a problem with both compilers ??
> Here is my code below:
> 
> main()
> {
>         int a = 1;
>         int b = 1;
>  
>         a+++++b;
>         printf("a => %d ; b => %d\n",a,b);
> }
----------------------------------------------------->
You do have the partial answer (i.e., the expression is illegal). The
answer you must come up with is why it is so. Look up a language manual
to figure out why.