'class' type redefinition rejection

Question

Having some issues with my two classes and having issues with my account files. I'm not fully sure how to go about fixing it with the classes I think being defined twice. I looked through other suggestions on how to fix it and I'm not exactly sure where to go with it. All the error says is 'Account:' 'class' type redefinitions

Account.h

#include <string>
class Account
{
private:
    unsigned int accountNumber;
    std::string firstName, lastName;
    double balance;
    static unsigned int count;

public:
    Account();
    void setFirstName(std::string fName);
    void setLastName(std::string lName);
    void setBalance(double inBalance);
    void display();
};

this would be the main file

Account.cpp

#include "Account.h"
#include <iostream>
using namespace std;

//Initializes the static counter set equal to 0
unsigned int Account::count = 0;

//Sets up a default constructor
Account::Account()
{
    count++;
    //Set accountNumber to count
    accountNumber = count;
}

//Sets up the first name
void Account::setFirstName(std::string fName)
{
    firstName = fName;
}

//Sets up the last name
void Account::setLastName(std::string lName)
{
    lastName = lName;
}

//Sets up the balance
void Account::setBalance(double inBalance)
{
    balance = inBalance;
}

//Displays the details of the Account
void Account::display()
{
    cout << fixed;
    cout.precision(2);
    cout << "Balance: " << balance << endl;
    cout << "Account: " << accountNumber << endl;
    cout << "First Name: " << firstName << endl;
    cout << "Last Name: " << lastName << endl;
}

Answer 1

You need include guards in your header file

#ifndef ACCOUNT_H_
#define ACCOUNT_H_
#include <string>
class Account
{
private:
    unsigned int accountNumber;
    std::string firstName, lastName;
    double balance;
    static unsigned int count;

public:
    Account();
    void setFirstName(std::string fName);
    void setLastName(std::string lName);
    void setBalance(double inBalance);
    void display();
};
#endif

this prevents the header being included twice in one file