Question

为什么会出现此错误？我不知所措......

错误：请求push_back中的成员v，该类型为非类型std::vector<Leaf, std::allocator<Leaf> >*

class Leaf 
{
public:

    // Variables
    std::string *name;

    // Methods
    Leaf(){}
    Leaf(std::string *s)
    {
        name = s;
    }
};

class Branch 
{
public:

    // Variables
    Branch::Branch *parent;
    Branch::Branch *child;
    std::vector<Leaf> *children;
    std::string *name;

    // Methods
    Branch(std::string *s)
    {
        children = new std::vector<Leaf>;
        name = s;
    }
};

class Tree 
{
public:

    // Variables
    Branch::Branch *current;

    // Methods
    Tree(string *name)
    {
        current = new Branch::Branch(name);
    }

    void addBranch(Branch::Branch *newBranch)
    {
        this->current->child = newBranch;
        newBranch->parent = this->current;
    }

    void addLeaf(Leaf::Leaf *leaf)
    {
        std::vector<Leaf> *v = this->current->children;
        v.push_back(leaf);
    }
};

Answer 1

在函数addLeaf()中，v是指针，leaf是指针，你需要取消引用它们。

v->push_back(*leaf);

此外，所有范围资格都有，例如Leaf::Leaf和Branch::Branch？它应该只是Leaf和Branch。

Answer 2

v是一个指向矢量的指针。使用->代替.。即v->push_back(whatsit)

C ++错误：请求'v'中的成员'push_back'

2 个答案: