c++ 将float数组传入dll
时间: 2023-08-03 14:09:50 浏览: 161
要将float数组传入dll,可以使用以下步骤:
1. 在dll中定义一个函数,该函数接受一个指向float数组的指针和数组的长度作为参数。
2. 在c++代码中,使用LoadLibrary函数加载dll,并使用GetProcAddress函数获取dll中定义的函数地址。
3. 将float数组的指针和长度作为参数传递给从dll中获取的函数。
以下是一个示例dll函数和c++代码的示例:
在dll中定义函数:
```c++
extern "C" __declspec(dllexport)
void process_float_array(float* arr, int len)
{
// do something with the float array
}
```
在c++代码中调用dll函数:
```c++
#include <windows.h>
#include <iostream>
typedef void (*process_float_array_func)(float*, int);
int main()
{
// load the dll
HINSTANCE hinstLib = LoadLibrary(TEXT("mydll.dll"));
// get the function address
process_float_array_func process_float_array =
(process_float_array_func)GetProcAddress(hinstLib, "process_float_array");
// call the function with the float array
float my_arr[] = {1.0f, 2.0f, 3.0f};
int arr_len = sizeof(my_arr) / sizeof(float);
process_float_array(my_arr, arr_len);
// free the library
FreeLibrary(hinstLib);
return 0;
}
```
注意:在编译dll时,需要使用__declspec(dllexport)修饰符来导出函数。在c++代码中,需要使用typedef定义函数指针类型,并使用GetProcAddress函数获取函数地址。
阅读全文
相关推荐
















