是否可以创建矢量矢量？ [英] Is it possible to create a vector of vector?
问题描述
新手提醒：我来自C方面，努力学习C ++。
我需要一个二维数据结构。我首先尝试了一个常规的
向量，并用我自己的结构和指针添加了第二维。我的b $ b无法使它工作。太多的非法任务。
我的下一次尝试是创建一个矢量矢量（或矢量列表，
等）。编译器（MSVC ++）似乎不喜欢这样的结构。我想b $ b猜我可以试试gcc，但是让我们听听专家的意见。
我们非常欢迎您的建议。
-RFH
Newbie alert: I come from the C side, struggling to learn C++.
I need a two-dimensional data structure. I first tried a regular
vector and added the 2nd dimension with my own structs and pointers. I
couldn''t make it work. Too many illegal assignments.
My next attempt was to create a vector of vector (or list of vector,
etc.). The compiler (MSVC++) doesn''t seem to like such structure. I
guess I could try gcc, but let''s hear the experts'' opinions.
Your suggestions are most welcome.
-RFH
推荐答案
Ramon F Herrera写道：
Ramon F Herrera wrote:
我的下一次尝试是创建一个矢量矢量（或矢量列表，
等）。
My next attempt was to create a vector of vector (or list of vector,
etc.).
这似乎是一种非常合理的方法。
This seems a very reasonable approach.
编译器（MSVC ++）没有'似乎不喜欢这样的结构。
The compiler (MSVC++) doesn''t seem to like such structure.
你能发一个证明问题的小例子。
你能否更具体地解决这个问题你有。
LR
Can you please post a small example that demonstrates the problem.
Can you also be more specific about the problem that you''re having.
LR
2月23日23:38，Ramon F Herrera< ra ... @ conexus。 netwrote：
On 2 jun, 23:38, Ramon F Herrera <ra...@conexus.netwrote:
新手警报：我来自C方面，努力学习C ++。
我需要一个两个 - 维度数据结构。我首先尝试了一个常规的
向量，并用我自己的结构和指针添加了第二维。我的b $ b无法使它工作。太多的非法任务。
我的下一次尝试是创建一个矢量矢量（或矢量列表，
等）。编译器（MSVC ++）似乎不喜欢这样的结构。我想b $ b猜我可以试试gcc，但是让我们听听专家的意见。
我们非常欢迎您的建议。
-RFH
Newbie alert: I come from the C side, struggling to learn C++.
I need a two-dimensional data structure. I first tried a regular
vector and added the 2nd dimension with my own structs and pointers. I
couldn''t make it work. Too many illegal assignments.
My next attempt was to create a vector of vector (or list of vector,
etc.). The compiler (MSVC++) doesn''t seem to like such structure. I
guess I could try gcc, but let''s hear the experts'' opinions.
Your suggestions are most welcome.
-RFH
Mi english不太好。我试图解释。
例如：
std :: vector< std :: vector< int myVector; //这会创建一个向量
整数向量
现在，你可以这样做：
std :: vector< intvector;
vector.push_back（1）;
myVector.push_back（vector）;
然后：
std :: cout<< myVector [0] [0]<<的std :: ENDL; //这个打印1
如果你想初始化一个固定大小的矢量矢量，请使用
以下行：
std :: vector< std :: vector< int myVector（number_of_rows，
std :: vector< int>（number_of_colums，default_value））;
读 http://www.sgi.com/tech/stl/Vector.html 了解
构造函数的调用。
我希望你理解。
问候
-
Mauro Ciancio
Mi english is not so good. Im trying to explain.
For example:
std::vector< std::vector<int myVector; // this creates a vector of
vector of integers
Now, you can do this:
std::vector<intvector;
vector.push_back(1);
myVector.push_back(vector);
then:
std::cout << myVector[0][0] << std::endl; // this prints 1
If you want to initialize a vector of vector with a fixed size use the
following line:
std::vector< std::vector<int myVector (number_of_rows,
std::vector<int>(number_of_colums, default_value));
Read http://www.sgi.com/tech/stl/Vector.html to understand the
constructor calls.
I hope you understand.
Regards
--
Mauro Ciancio
Ramon F Herrera写道：
Ramon F Herrera wrote:
新手警报：我来自C方面，努力学习C ++。
我需要一个二维数据结构。我首先尝试了一个常规的
向量，并用我自己的结构和指针添加了第二维。我的b $ b无法使它工作。太多的非法任务。
我的下一次尝试是创建一个矢量矢量（或矢量列表，
等）。编译器（MSVC ++）似乎不喜欢这样的结构。我想b $ b猜我可以试试gcc，但是让我们听听专家的意见。
我们非常欢迎您的建议。
-RFH
Newbie alert: I come from the C side, struggling to learn C++.
I need a two-dimensional data structure. I first tried a regular
vector and added the 2nd dimension with my own structs and pointers. I
couldn''t make it work. Too many illegal assignments.
My next attempt was to create a vector of vector (or list of vector,
etc.). The compiler (MSVC++) doesn''t seem to like such structure. I
guess I could try gcc, but let''s hear the experts'' opinions.
Your suggestions are most welcome.
-RFH
#include< vector>
int main（int argc，char * argv []）{
std :: vector< std :: vector< int vectovect;
vectovect.resize（20）;
for（std :: vector< std :: vector< int :: iterator i = vectovect.begin（）;
i！= vectovect.end（）; ++ i）{
i->调整大小（30）;
}
}
-
Daniel Pitts的'科技博客：< http://virtualinfinity.net/wordpress/>
#include <vector>
int main(int argc, char *argv[]) {
std::vector<std::vector<int vectovect;
vectovect.resize(20);
for (std::vector<std::vector<int::iterator i = vectovect.begin();
i != vectovect.end(); ++i) {
i->resize(30);
}
}
--
Daniel Pitts'' Tech Blog: <http://virtualinfinity.net/wordpress/>
这篇关于是否可以创建矢量矢量？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
