[英]How to use pointers to point to vector of a struct?
struct Edge;
struct Node {
int id;
vector<Edge> *edges;
};
struct Edge {
int id;
Node* vertex1;
Node* vertex2;
};
int main(){
vector<Edge> nodeEdgeList;
Node* nodePtr = new Node;
nodePtr->id = vertex;
nodePtr->edges = nodeEdgeList;
}
由于最后一行,我收到以下编译器错误。
error: cannot convert 'std::vector<Edge, std::allocator<Edge> >' to 'std::vector<Edge, std::allocator<Edge> >*' in assignment
您的节点 class 有一个向量 * 作为您尝试将非指针设置为指针的成员
这里的错误信息很清楚error: cannot convert 'std::vector<Edge, std::allocator<Edge> >' to 'std::vector<Edge, std::allocator<Edge> >*' in assignment
所以改为:
int main(){
vector<Edge> *nodeEdgeList = new Vector<Edge>;
Node* nodePtr = new Node;
nodePtr->id = vertex;
nodePtr->edges = nodeEdgeList;
}
要么
int main(){
vector<Edge> nodeEdgeList;
Node* nodePtr = new Node;
nodePtr->id = vertex;
nodePtr->edges = &nodeEdgeList;
}
int main(){
vector<Edge> nodeEdgeList;
Node* nodePtr = new Node;
nodePtr->id = vertex;
nodePtr->edges = &nodeEdgeList; // <-- use & before
}
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