fstream 初始化为 class

Question

在您将其标记为重复之前，我已经阅读了以下内容Q&A。

我有一台名为 ATM 的简单 Class：

ATM.h

class ATM {
public:
    ATM(Bank* ownerBank, const char* inputFile);
    ~ATM();
    void performSingleATMAction();
    friend void* performSingleATMActionFunc(void* pVoidATM);
private:
    Bank* ownerBank;
    string inputFile;
    fstream fileReader;
    Thread mainThread;
    static const unsigned int ATM_SLEEP_TIME = 1000*100;
};

我尝试通过初始化列表对其进行初始化：

ATM::ATM(Bank* ownerBank, const char* inputFile) :
ownerBank(ownerBank),
inputFile(inputFile), 
fileReader(inputFile,std::ifstream::in), // why copy constructor?
mainThread(performSingleATMActionFunc,this)
{}

行 fileReader(inputFile,std::ifstream::in)

以某种方式调用复制构造函数..这是私有的

有帮助吗？

Answer 1

你可能正在复制 ATM 类型的对象。其中 - 默认情况下 - 复制所有成员。

这需要流的复制构造函数。

Note: having a filestream a member of an ATM class is a design smell to me. ATM machines don't "have-a" file, usually. So, probably you need a (member) function to read "transactions" (just guessing)

fstream 初始化为 class

fstream initialization as a class

c++

constructor

fstream