/in/foo.cc: In function 'int main()':
/in/foo.cc:19:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(a[i]=a[i+1]);
                 ^
/in/foo.cc:29:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(d[x]=d[x-1])
                 ^
/in/foo.cc:10:6: warning: variable 'y' set but not used [-Wunused-but-set-variable]
  int y;
      ^