File handling problem

HI folks,
This is my code. How can i pass a outside structure parameter to a class method?

Code:

---

using namespace std;
struct status
{
    char name[80];
    double balance;
    unsigned long account_num;
};


class FileHandler
{
public:
    FileHandler(string);
    ~FileHandler();
   
    int getRecords(struct status *);
    int putRecords(struct status *);
 
   

private:
    string fileName;
    fstream fPointer; // ref
};


FileHandler :: FileHandler(string fname)
{
    fPointer.open(fname, ios::out | ios::binary);
}
int FileHandler :: getRecords(struct status *acc)
{
    strcpy(acc.name, "Heartly");
    acc.balance = 1000;
    acc.account_num = 3;
    return 0;
}
int FileHandler :: putRecords(struct status *acc)
{
    cout << acc.name << endl;
    cout << "Account # " << acc.account_num;
    cout.precision(2);
    cout.setf(ios::fixed);
    cout << endl << "Balance: $" << acc.balance<<endl;
    return 0;
}

---

In FileHandler constructor i got the below error

Quote:

---

clshandle.cpp: In constructor ‘FileHandler::FileHandler(std::string)’:
clshandle.cpp:31:45: error: no matching function for call to ‘std::basic_fstream<char>:: open(std::string&, std::_Ios_Openmode)’
/usr/include/c++/4.5/fstream:866:7: note: candidate is: void std::basic_fstream<_CharT, _Traits>:: open(const char*, std::ios_base:: openmode) [with _CharT = char, _Traits = std::char_traits<char>, std::ios_base:: openmode = std::_Ios_Openmode]

---

in getReords() methods, i got the below error.

Quote:

---

clshandle.cpp: In member function ‘int FileHandler::getRecords(status*)’:
clshandle.cpp:53:13: error: request for member ‘name’ in ‘acc’, which is of non-class type ‘status*’
clshandle.cpp:54:6: error: request for member ‘balance’ in ‘acc’, which is of non-class type ‘status*’
clshandle.cpp:55:6: error: request for member ‘account_num’ in ‘acc’, which is of non-class type ‘status*’
clshandle.cpp: In member function ‘int FileHandler:: putRecords(status*)’:
clshandle.cpp:60:14: error: request for member ‘name’ in ‘acc’, which is of non-class type ‘status*’
clshandle.cpp:61:30: error: request for member ‘account_num’ in ‘acc’, which is of non-class type ‘status*’
clshandle.cpp:64:38: error: request for member ‘balance’ in ‘acc’, which is of non-class type ‘status*’

---

#1. Your FileHandler constructor should be:

Code:

---

FileHandler :: FileHandler(const string& fname)
{
    fPointer.open(fname.c_str(), ios::out | ios::binary);
}

---

The error points to the fact that there is no match for a string argument in the stream's open call. Basically, the older version of the standard did not support using a std::string as a file name parameter. The newer one supposedly does allow this. So, to get things to work you have to convert the std::string to something the open call can use... such as a const char* type which is what the c_str member function does.

#2. Your other error is because in your code acc is a pointer to a struct but your are attempting to access it as if it were not a pointer. You would need to use -> instead of '.' to access the struct's data members. However, I'd just use a reference instead of a pointer.

#3. The putRecords member function should be declared const as it does not modify the object.

#4. Is there a reason the status struct's name member is not a std::string?