[英]How to actually initialize a 2d vector of objects from a class/constructor
到目前為止,最接近回答這個問題的唯一鏈接是: 我如何初始化本身具有非平凡構造函數的對象的stl向量?
但是,我嘗試這樣做,但仍然感到困惑。
相關代碼:
邊緣
// Edge Class
class Edge{
public:
// std::string is used to avoid not a name type error
Edge (std::string, double);
double get_dist();
std::string get_color();
~Edge();
private:
std::string prv_color; // prv_ tags to indicate private
double prv_distance;
};
Edge::Edge (std::string color, double distance){
prv_color = color;
prv_distance = distance;
};
圖形
// Graph Class
class Graph{
public:
Graph (double, double);
double get_dist_range();
~Graph();
private:
double prv_edge_density; // how many edges connected per node
double prv_dist_range; // start from 0 to max distance
std::vector < std::vector <Edge*> > nodes; // the proper set-up of
};
// Graph constructor
Graph::Graph (double density, double max_distance){
prv_edge_density = density;
prv_dist_range = max_distance;
nodes (50, std::vector <Edge*> (50)); // THIS LINE STUMPS ME MOST
};
當我嘗試初始化對象指針的向量時,我從以下行得到此錯誤:
nodes (50, std::vector <Edge*> (50)); // Error at this line
error: no match for call to ‘(std::vector<std::vector<Edge*, std::allocator<Edge*> >,
std::allocator<std::vector<Edge*, std::allocator<Edge*> > > >)
(int, std::vector<Edge*, std::allocator<Edge*> >)’
我希望盡快對此提出建議。
注意:假設我已經使用.cpp文件和.h文件來分隔代碼
您需要了解初始化器列表
// Graph constructor
Graph::Graph (double density, double max_distance) :
nodes (50, std::vector <Edge*> (50))
{
prv_edge_density = density;
prv_dist_range = max_distance;
}
未經測試的代碼。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.