如何将Int32 *转换为Int32？

Question

这是我的代码

int32 *iPos;
status =scriptData.GetInt32(iPos);
int32 position=iPos;

但它出现error C2440: 'initializing' : cannot convert from 'int32 *' to 'int32'

如何将Int32 *转换为Int32？

Answer 1

只需取消引用它：

int32 position = *iPos;

但更优雅的版本是使用&运算符来获取指向position的指针：

int32 position;
status = scriptData.GetInt32(&position);

Answer 2

也许你应该这样做：

int32 position = *ipos;

（* ipos）返回指针的值，（＆amp; ipos）返回指针的地址

Answer 3

你显然应该尝试下一个Int32指针工厂：

class Int32Factory {
public:
    static Int32Factory *instance() {
        static std::unique_ptr<Int32Factory> s_s(new Int32Factory());
        return s_s.get();
    }

    ~Int32Factory() {
        for (auto i : m_items) {
            delete i;
        }
    }

    int32 *getInt() {
        m_items.push_back(new int32());
        return m_items.back();
    }

private:
    std::vector<int32 *> m_items;

    Int32Factory() { }
};

使用简单，只需执行后续步骤：

int32 *iPos = Int32Factory::instance()->getInt();
status = scriptData.GetInt32(iPos);