使用外部常量整数初始化结构数组时,我收到一条错误消息“表达式必须具有常量值”。
文件1.c:
const unsigned char data1[] =
{
0x65, 0xF0, 0xA8, 0x5F, 0x5F,
0x5F, 0x5F, 0x31, 0x32, 0x2E,
0x31, 0xF1, 0x63, 0x4D, 0x43,
0x52, 0x45, 0x41, 0x54, 0x45,
0x44, 0x20, 0x42, 0x59, 0x3A,
0x20, 0x69, 0x73, 0x70, 0x56,
// ...
};
const unsigned int data1_size = sizeof(data1);
文件2.c:
const unsigned char data2[] =
{
0x20, 0x44, 0x61, 0x74, 0x61,
0x20, 0x52, 0x6F, 0x77, 0x20,
0x3D, 0x20, 0x34, 0x38, 0x12,
//...
};
const unsigned int data2_size = sizeof(data2);
Get_Byte.c:
extern const unsigned char * data1;
extern const unsigned int data1_size;
extern const unsigned char * data2;
extern const unsigned int data2_size;
struct Array_Attributes
{
const unsigned char * p_data;
const unsigned int size;
};
const struct Array_Attributes Data_Arrays[] =
{
{data1, data1_size}, // Error message is for data1_size here.
{data2, data2_size}, // Another error message generated for data2_size here.
};
我还从of 字段中删除了const
限定符并得到相同的错误消息。size
Array_Attributes
data1_size
为什么编译器在不同的翻译单元中data2_size
抱怨常量值表达式?const unsigned int
我想要一个在编译时生成的 [array address, array size] 常量数组。
我ccarm
在 Windows XP 上使用 Green Hills 4.24,C 语言不是C++。