As std :: vector 保证数据存储在连续的内存中，可以将向量转换为如下的指针：

As std::vector guarantees the data is stored in contiguous memory, you can convert a vector to a pointer like so:

std::vector<float> myFloats;
void *ptr = static_cast<void*>(&myFloats[0]); // or &myFloats.front()

编辑：如果您正在写入， code> push_back ，请确保 resize 先有足够的空间！

if you are writing to it without calling push_back, make sure you resize enough space first!