多个向量共有的元素...... [英] elements common to more than one vector...
问题描述
是否有一个我可以使用的功能，给定一些向量元素
对所有人来说是通用的？
例如
vector< int> a;
vector< int> b;
a.push_back（1）;
a.push_back（2）;
a.push_back（3） ;
a.push_back（4）;
b.push_back（2）;
b.push_back（4）;
有什么能让我回答2和4的答案？ （结果将
存储在另一个向量中）。
如果我有两个以上的向量进行比较怎么办 - 我会以某种方式称之为
对每一对的功能？ （即a与b，b与c，a与c？）
Is there a function that I can use that given a few vectors which elements
are common to all?
for example
vector<int> a;
vector<int> b;
a.push_back( 1 );
a.push_back( 2 );
a.push_back( 3 );
a.push_back( 4 );
b.push_back( 2 );
b.push_back( 4 );
Something that will give me back the answer of 2 and 4? (The results would
be stored in another vector).
What if I have more than 2 vectors to compare - would I somehow call this
function against each pair? (ie a vs. b, b vs. c, a vs. c?)
推荐答案
Winbatch写道：
Winbatch wrote:
是否有一个我可以使用的函数，给定一些向量的元素
对所有人来说是通用的？
例如
vector< int> a;
向量< int> b;
a.push_back（1）;
a.push_back（2）;
a.push_back（3）;
a.push_back（4）;
b.push_back（2）;
b.push_back（4）;
有什么能让我回答2和4的答案？ （结果将存储在另一个向量中。）
如果我有两个以上的向量进行比较怎么办？我会以某种方式对每一对称为
函数吗？ （即a vs. b，b vs. c，a vs. c？）
Is there a function that I can use that given a few vectors which elements
are common to all?
for example
vector<int> a;
vector<int> b;
a.push_back( 1 );
a.push_back( 2 );
a.push_back( 3 );
a.push_back( 4 );
b.push_back( 2 );
b.push_back( 4 );
Something that will give me back the answer of 2 and 4? (The results would
be stored in another vector).
What if I have more than 2 vectors to compare - would I somehow call this
function against each pair? (ie a vs. b, b vs. c, a vs. c?)
也许你真的想玩std :: set？
Maybe you really want to be playing with std::set?
>
也许你真的想玩std :: set？
Maybe you really want to be playing with std::set?
即使我确实切换到设置，我的问题仍然存在，对吧？
Even if I did switch to set, my question still stands, right?
" Winbatch" <无线****** @ techie.com>在消息中写道
新闻：3％**************** @ news-wrt-01.rdc-nyc.rr.com ...
"Winbatch" <wi******@techie.com> wrote in message
news:3%****************@news-wrt-01.rdc-nyc.rr.com...
也许你真的想玩std :: set？
Maybe you really want to be playing with std::set?
即使我确实切换到设置，我的问题仍然存在，对吗？
Even if I did switch to set, my question still stands, right?
它是否带有set_intersection？如果我有超过2套怎么办？我想我
只是对每一组进行函数调用？
Is it with set_intersection? What if I have more than 2 sets? I guess I
just do the function call for each set against the last?
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