小编Ant*_*sis的帖子

我有以下单链表实现.

template <typename T> struct node{
    node(T data):data(data),next(nullptr){}
    T data;
    node<T> * next;
};

template< typename T> class slist{
    node<T>* head;
    int size;
public:
    slist(node<T>* head):head(head), size(0){}

    slist(const slist<T>& rhs){

        node<T>* temp = rhs.getHead();
        node<T>* p = new node<T>(temp->data);
        head = p;
        node<T>* current = p;
        while(temp != nullptr){
            current = current->next;
            current->data = temp->data;
        }

    }
    ~slist(){
        if(head == nullptr) return;

        while(head != nullptr){
            node<T>* current = head;
            head = head->next;
            delete(current);
        }
    }
    slist& operator= (const slist& rhs){ …

我正在尝试从C++中的命令行读取多行输入并将它们存储到一个数组中.这是我的代码.

std::string line;
    int in;
    std::vector<std::string> v;

    while(std::getline(std::cin, line)){
        if(line == "^D") break;
        v.push_back(line);
    }
    for(auto it = v.begin(); it != v.end(); it++){
        std::cout<<*it<<std::endl;

    }

stdin进入无限循环,我似乎无法弄清楚如何防止这种情况.基本上,目标行为是连续两次按Enter而没有任何输入应该终止stdin循环并运行程序.

我有一个以下类型的结构

typedef struct Edge
{
    int first;
    int second;

}Edge;

我在我的main函数中实例化并复制到数组中

Edge h_edges[NUM_EDGES];
for (int i = 0; i < NUM_VERTICES; ++i)
    {
        Edge* e = (Edge*)malloc(sizeof(Edge));
        e->first = (rand() % (NUM_VERTICES+1));
        e->second = (rand() % (NUM_VERTICES+1));
        memcpy(h_edges[i], e, sizeof(e));
    }

我一直遇到以下错误.

src/main.cu(28): error: no suitable conversion function from "Edge" to "void *" exists  

第28行是memcpy发生的行.任何帮助赞赏.