为什么大多数C开发人员使用define而不是const?[副本]

const

fieldWidth

const static const extern

#define #ifdef #

#define SCALE 1

...

scaled_x = x * SCALE;

SCALE 1 x * 1 == x

enum dummy_enum {
   constant_value = 10010
};

const static

fieldWidth const switch

FIELD_WIDTH 10

int

enum { fieldWidth = 10 };

enum { FIELD_WIDTH = 16384 };
char buf[FIELD_WIDTH];

const a large list of coefficients