将std容器传递给函数 [英] Pass a std container to a function

问题描述

我想出了以下内容：

template <typename T> inline void printcontainer( std::vector<T> container )
{
    for( auto it = container.begin(); it != container.end(); it++ )
    {
        std::cout << *it << std::endl;
    }
}


int _tmain(int argc, _TCHAR* argv[])
{
    std::vector<int> v;
    v.push_back(5);
    v.push_back(4);
    v.push_back(3);
    printcontainer(v);

    return 0;
}

（对不起， push_backs ，visual studio不接受初始化列表... ugh !!）

(Sorry for the push_backs, visual studio doesn't accept initializer lists...ugh!!)

现在这个函数限制为 std :: vector ，我怎样才能让它传递其他容器，如 std :: list 数组等...

now this function is limited to std::vector, how can I make it so that I can pass other containers, like std::list arrays etc...

推荐答案

只需对容器存储的类型不要模板，而是容器本身的类型：

Simply don't template on the type stored by the container, but on the type of the container itself:

template <typename Container>
inline void printcontainer(const Container &container)

注意， const 引用以避免不必要的复制。

Note that I changed the argument to const reference to avoid an unnecessary copy.

成员 std :: begin 和 std :: end 或使用 range based for loop ：

You can generalize your print function to C arrays by using the non-member std::begin and std::end or by using a range based for loop:

template <typename Container>
inline void printcontainer(const Container &container) {
    for (const auto &v : container)
        std::cout << v << "\n";
}

OT注意：您可能不需要 这里。

OT remark: You probably do not need the inline here.

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