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#include <iostream>
#include <fstream>
#include <cstring>
#include <exception>
using namespace std;
struct status
{
char name[80];
double balance;
unsigned long account_num;
};
class FileHandler
{
public:
FileHandler(const string&);
~FileHandler();
int getRecords(struct status &);
int putRecords(struct status &)const;
int ReadRecord(int ,struct status *);
int WriteRecord(int ,struct status *);
private:
string fileName;
fstream fPointer; // ref
};
FileHandler :: FileHandler(const string& fname)
{
fPointer.exceptions(fstream::failbit | fstream::badbit);
fPointer.open(fname.c_str(), ios::out | ios::in | ios::binary);
}
int FileHandler :: WriteRecord(int RecNum,struct status *acc)
{
if( fPointer.seekp(RecNum*sizeof(struct status), ios::beg) == 0 )
if ( fPointer.write((char *) acc, sizeof(struct status) ))
return 1;
return 0;
}
int FileHandler :: ReadRecord(int RecNum,struct status *acc)
{
if( fPointer.seekg(RecNum*sizeof(struct status), ios::beg) == 0 )
if ( fPointer.read((char *) acc, sizeof(struct status) ))
return 1;
return 0;
}
FileHandler :: ~FileHandler()
{
fPointer.close();
}
int FileHandler :: getRecords(struct status &acc)
{
strcpy(acc.name, "INFANT");
acc.balance = 1000;
acc.account_num = 3;
return 0;
}
int FileHandler :: putRecords(struct status &acc)const
{
cout << acc.name << endl;
cout << "Account # " << acc.account_num;
cout.precision(2);
cout.setf(ios::fixed);
cout << endl << "Balance: $" << acc.balance<<endl;
return 0;
}
int main()
{
try {
FileHandler fp("abc.cli");
struct status acc;
fp.getRecords(acc);
fp.WriteRecord(0,&acc);
strcpy(acc.name, "");
acc.balance = 0;
acc.account_num = 0;
fp.ReadRecord(0,&acc);
fp.putRecords(acc);
} catch (exception) {
cout << "An exception occurred" << endl;
}
return 0;
}
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