Q:
         
         
            
               Indicate what would the SWAP macro be expanded to on preprocessing. Would the code compile?
            
                           
                  
#define SWAP (a, b, c ) (c t; t = a, a = b, b = t; )
main()
{
    int x = 10, y = 20;
    SWAP (x, y, int );
    printf ( " %d%d ", x, y);
}
               
                      
         
             Answer
                        ( int t ; t = a, a = b, b = t ;);
This code won't compile since declaration of t cannot occur within parentheses.
 
          
         
         
         
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