C ++转换std :: vector <char*> 字符**

Question

How can I cast or convert a std::vector to char** in C++?

I'm using std::vector because I need to push_back some strings inside a loop, but then I have to call a C function that requires a char**.

Answer 1

std::vector::data will produce char** , although this pointer can get invalidated if reallocation happens on the vector.

Also, &vec[0] is another technique for producing a mutable pointer, but you need to be careful with this approach.

Answer 2

Use the data method for this : http://en.cppreference.com/w/cpp/container/vector/data
which will return a pointer to the vectors data