C语言 C: typedef 联合
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C: typedef union
提问by dccharacter
didn't find anything in related questions. Most probably it's super noob, but I'll ask anyway/ I've got the following in my .h file:
在相关问题中没有找到任何内容。很可能是超级菜鸟，但我还是会问/我的 .h 文件中有以下内容：
typedef union _API_Packet_0x90{
uint8_t packet[26];
struct _pack_struct {
uint8_t start;
uint8_t length[2];
uint8_t addr64[8];
uint8_t addr16[2];
uint8_t options;
uint8_t rfData[4];
uint8_t chksum;
};
} API_Packet_0x90;
API_Packet_0x90 ap90;
This is code for a microcontroller, I'm using xc8 toolchain (former Hi Tech C). The compiler says:
这是微控制器的代码，我使用的是 xc8 工具链（前 Hi Tech C）。编译器说：
xbee_api.h:19: warning: missing basic type; int assumed
xbee_api.h:19: error: ";" expected
xbee_api.h:19: warning: missing basic type; int assumed
xbee_api.h:21: warning: missing basic type; int assumed
xbee_api.h:19: 警告：缺少基本类型；int 假定
xbee_api.h:19: 错误: ";" 预期
xbee_api.h:19: 警告: 缺少基本类型；int 假定
xbee_api.h:21: 警告：缺少基本类型；假设为整数
, and this goes on (too many errors)
，然后继续（错误太多）
I thought it's uint8_t, so I added #include <ctypes.h>. Nope. I thought it is about names, so I tried all kinds of plays such as
我以为是 uint8_t，所以我添加了#include <ctypes.h>. 不。我以为是关于名字的，所以我尝试了各种戏剧，例如
typedef union {
uint8_t packet[26];
struct _pack_struct {
};
} API_Packet_0x90;
or
或者
typedef union {
uint8_t packet[];
struct _pack_struct {
};
} API_Packet_0x90;
or others. Nothing helps. I'm stuck as I believe I'm following syntax properly. Any help?
或其他。没有任何帮助。我被卡住了，因为我相信我正确地遵循了语法。有什么帮助吗？
回答by Lundin
uint8_tis located in stdint.h, not in ctype.h(nor ctypes.h, no such header exists). You must use a compiler that follows a newer version of the C standard for this header to be found (C99 or C11 standards).
uint8_t位于stdint.h，不在ctype.h（也不在 ctypes.h，不存在这样的头文件）。您必须使用遵循更新版本的 C 标准的编译器才能找到此头文件（C99 或 C11 标准）。
