Thread: Anyone know how to use this formula?

address of the first record in the array + (account number - 1000) * sizeof(int).

I am supposed to read this file into 4 separate arrays. And, be able to request a user-entered account number and display the corresponding name and account balance. This is all I come up with so far, but not really sure how to use that formula.

Code:

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
using namespace std;

int main()
{
	string filename = "bank.dat";
	const int CUSTOMERS=5;
	int i=0, acctNum[CUSTOMERS];
	string firstName[CUSTOMERS], lastName[CUSTOMERS];
	float balance[CUSTOMERS];

	ifstream inFile;

	inFile.open(filename.c_str());

	if(inFile.fail())
	{
		cout<<"\nThe file named "<<filename<<" was not successfully opened"
			<<"\nPlease check that the file currently exists."
			<<endl;
		exit(1);
	}
	cout<<"\nThe file has been successfully opened for reading."
		<<endl<<endl;
	
	inFile>>acctNum>>firstName>>lastName>>balance;

	cout<<"\nEnter the account number for the customer you are looking for: "<<endl;
	
    
	
	
	inFile.close();

	return 0;



}

this line also gives me this error: error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'int [5]' (or there is no acceptable conversion)

Code:

inFile>>acctNum>>firstName>>lastName>>balance;