Question

I need some confirmation. I always get correct o/p but someone told me following expression will not work

Thanks in advance.

#define a 11

#define b 12

#define c 13     
    // I want if array[i] has values of any of these  then do something
    if( array[i] ==  (a) ||(b) ||( c))    
   // some function    
  else    
  printf("no match"); 

Answer 1

Replace your code with this:

if( array[i] == a || array[i] == b || array[i] == c)

Each part of the boolean condition must be a complete expression. While what you wrote is valid C code, it doesn’t achieve what you want: you need to make an array element comparison in every part.