Is it possible to get the pointer the continous memory fragment in a std::vector in C++?

Question

I moved my code to use std::vector instead of char *mem = malloc(...) but now I am facing a problem that I can only access the vector d

Answer 1

The standard way to access the vector data is to use

&data[0]

Answer 2

You can write that code perfectly legally. All you need to do is alter fill_data to take a std::vector<T>&. Of course, if this is an external C API, then you don't have much choice in the matter.

Answer 3

Of course. The vector was designed for this purpose:

char * p = &(myVector[0]) ;

And now, p points to the first item in the vector, and you can access each item by playing with the pointer, as you would in C.