我正在嘗試將單個陣列組件的地址轉換為另一個結構
以下是結構：
#define ADDRESS_SPACE 8
struct dma_engine
{
int *Address[ADDRESS_SPACE] = {nullptr};
};
struct data_engine
{
int data[ADDRESS_SPACE] = {0x10,0x14,0x18,0x1B,0x20,0x24,0x28,0x2B};
};
當我單獨執行每個陣列組件時，它的作業原理如下：
dma_engine Dma_0;
data_engine Data_0;
Dma_0.Address[0] = (int*) &Data_0.data[0];
Dma_0.Address[1] = (int*) &Data_0.data[1];
Dma_0.Address[2] = (int*) &Data_0.data[2];
Dma_0.Address[3] = (int*) &Data_0.data[3];
Dma_0.Address[4] = (int*) &Data_0.data[4];
Dma_0.Address[5] = (int*) &Data_0.data[5];
Dma_0.Address[6] = (int*) &Data_0.data[6];
Dma_0.Address[7] = (int*) &Data_0.data[7];
但是當我試圖一次通過所有東西時，就像這樣：
dma_engine Dma_0;
data_engine Data_0;
Dma_0.Address = (int*) &Data_0.data;
我收到以下編譯錯誤：
main.cpp: In function ‘int main(int, char**)’:
main.cpp:30:36: error: incompatible types in assignment of ‘int*’ to ‘int* [8]’
30 | Dma_0.Address = (int*) &Data_0.data;
另外，當我嘗試這種方式時不起作用：
dma_engine Dma_0;
data_engine Data_0;
Dma_0.Address = &Data_0.data;
我收到這個錯誤！
main.cpp: In function ‘int main(int, char**)’:
main.cpp:30:36: error: incompatible types in assignment of ‘int*’ to ‘int* [8]’
30 | Dma_0.Address = (int*) &Data_0.data;
有人可以幫我嗎？
非常感謝
uj5u.com熱心網友回復：
您需要更改Address為指向int[ADDRESS_SPACE]：
#define ADDRESS_SPACE 8
struct dma_engine {
int (*Address)[ADDRESS_SPACE] = nullptr; // correct type
};
struct data_engine {
int data[ADDRESS_SPACE] = {0x10, 0x14, 0x18, 0x1B, 0x20, 0x24, 0x28, 0x2B};
};
int main() {
dma_engine Dma_0;
data_engine Data_0;
Dma_0.Address = &Data_0.data; // no cast here
}
或者只是一個簡單的int*：
#define ADDRESS_SPACE 8
struct dma_engine {
int *Address = nullptr; // int*
};
struct data_engine {
int data[ADDRESS_SPACE] = {0x10, 0x14, 0x18, 0x1B, 0x20, 0x24, 0x28, 0x2B};
};
int main() {
dma_engine Dma_0;
data_engine Data_0;
Dma_0.Address = Data_0.data; // still no cast here, but don't take the address
}
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