如何使用for_each的输出来清点? [英] How do I use for_each to output to cout?
问题描述
有没有更直接的方式来做到这一点?
Is there a more straight-forward way to do this?
的for_each(v_Numbers.begin(),v_Numbers.end(),bind1st(运营商<<,COUT));
如果没有一个明确的为
循环,如果可能的话。
Without an explicit for
loop, if possible.
编辑:
如何做到这一点的的std :: CIN
与的std ::矢量
如果可能的话? (如何阅读 N
元素只)?
How to do this for std::cin
with a std::vector
if possible? (How to read n
elements only)?
推荐答案
同样的事情也将是这样的:
Something similar would be this:
std::vector<int> v_Numbers; // suppose this is the type
// put numbers in
std::copy(v_Numbers.begin(), v_Numbers.end(),
std::ostream_iterator<int>(cout));
如果你添加一些后缀这会更好:
It would be even nicer if you add some suffix:
std::copy(v_Numbers.begin(), v_Numbers.end(),
std::ostream_iterator<int>(cout, "\n"));
这假定你的容器是矢量&lt; INT&GT;
,所以你将不得不更换了部分使用合适的类型
This assumes that your container is a vector<int>
, so you will have to replace that part with the appropriate type.
修改
std::vector<int> v_Numbers;
std::copy(std::istream_iterator<int>(cin), std::istream_iterator<int>(),
std::back_inserter(v_Numbers));
如果你想只读n个元素,看<一href="http://stackoverflow.com/questions/3829885/how-to-copy-a-certain-number-of-chars-from-a-file-to-a-vector-the-stl-way">this问题。
If you want to read n elements only, look at this question.
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