指向所有std :: vector元素的指针

Question

What is the optimal (from code readability and semantics) way to get a pointer to all std::vector elements so it can be used as usual array? I used to use:

void Func( int* )

  ...

std::vector<int> x(1000);
Func(&(x[0]));

but i wonder is there any prettier way to do this? x.begin() returns vector::iterator.

Answer 1

x.data()在C ++ 11或&x.front()在C ++ 03

Answer 2

Aside from Dave's answers, you can leave out the parentheses:

int * xP = &x[0];

Which is really as short as it's going to get.

Answer 3

您也可以这样编写： int * xp = &x.front() ，但是对此没有最佳解决方案，编译器应将您编写的所有内容均优化为相同的结果。

Answer 4

可以保证向量在C ++ 11中以及从vc ++ 6.0到vc ++ 2012的平台中具有连续的存储。