27、很酷的C語言技巧

文獻【1】中列表了幾個C語言技巧。如

1、通過靜態分配儲存空間來初始化特定索引值的指標數組。

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/* 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/* ... */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"/* ... */};

 2、初始化結構體中特定的元素。

（C++語言通過使用建構函式實現）

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

 3、宏列表（不錯，值得學習）。

4、編譯時間斷言等。

參考

【1】 http://news.cnblogs.com/n/136894/