#define MASK(col) (0x80 >> ((col) & 7))

int array[9] = { 0, 64, 32, 16, 8, 4, 2, 1};
  #define MASK(col) (array[col])

(((0) & 7) = 0, ((1) & 7) = 64, ((2) & 7) = 32, ((3) & 16)...)

"#10010 errors encountered during linking "life.out" not built"
"#10056 "array" redefined: first defined in './lifelib.obj', redefined in
'./life.obj'"

int __life_mask_array[9] = { 0, 64, 32, 16, 8, 4, 2, 1};
#define MASK(col) (__life_mask_array[col])

#define MASK(col) (0x80 >> ((col) % 8))

#define MASK(col) (0x80 >> ((col) & 7))

int __life_mask_array[] = { 128, 64, 32, 16, 8, 4, 2, 1 };

extern int __life_mask_array[]
#define MASK(col) (array[(col)&7])