如何將Int32 *轉換爲Int32？

Question

這是我的代碼

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

但它發生error C2440: 'initializing' : cannot convert from 'int32 *' to 'int32'

如何轉換的Int32 *來的Int32？

Answer 1

只返回指針的地址取消對它的引用：

int32 position = *iPos; 

但更優雅的版本是使用&運算符來獲取指向position的指針：

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

Answer 2

也許你應該這樣做：

int32 position = *ipos; 

（*首次公開招股）返回指針的值，（&首次公開募股）

Answer 3

顯然，你應該嘗試的Int32指針工廠像下一個：

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() { } 
}; 

它使用簡單，只要做下面的步驟：

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