'class' type redefinition rejection - c++

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