/in/foo.c: In function 'main':
/in/foo.c:4:15: warning: missing braces around initializer [-Wmissing-braces]
   int a[2][3]={1,2,3,4,5,6},n,(*p)[3];
               ^
/in/foo.c:4:15: note: (near initialization for 'a')
/in/foo.c:6:18: error: invalid operands to binary + (have 'int *' and 'int *')
  printf("%d",p[0]+p[1]+p[2]);
                  ^ ~
/in/foo.c:4:29: warning: unused variable 'n' [-Wunused-variable]
   int a[2][3]={1,2,3,4,5,6},n,(*p)[3];
                             ^