一、指定的初始化

int fibs[] = {1, 1, 2, 3, 5};

二、数组

/* Entries may not correspond to actual numbers. Some entries omitted. */
#define EINVAL 1
#define ENOMEM 2
#define EFAULT 3
/* ... */
#define E2BIG 7
#define EBUSY 8
/* ... */
#define ECHILD 12
/* ... */

现在，假设我们想为每个错误码提供一个错误描述的字符串。
为了确保数组保持了最新的定义，无论头文件做了任何修改或增补，我们都可以用这个数组指定的语法

char *err_strings[] = {
                     [0] = "Success",
                     [EINVAL] = "Invalid argument",
                     [ENOMEM] = "Not enough memory",
                     [EFAULT] = "Bad address",/* ... */
                     [E2BIG ] = "Argument list too long",
                     [EBUSY ] = "Device or resource busy",/* ... */
                     [ECHILD] = "No child processes"/* ... */
 };

三、结构体与联合体

struct point {int x;int y;int z;}
struct point p = {
    .x = 3,
    .y = 4,
    .z = 5
};

四、宏列表

**

#define FLAG_LIST(_) \
                     _(InWorklist) \
                     _(EmittedAtUses) \
                     _(LoopInvariant) \
                     _(Commutative) \
                     _(Movable) \
                     _(Lowered) \
                     _(Guard)