Inheritance & Class Help

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I have been assigned a project that deals with Inheritance and classes. I am having trouble calling between classes. I am very ignorant in the area of inheritance I'm not anywhere close to a mediocre programmer. Any help is very much appreciated.

I have deleted the details of the functions under the check and save classes to save anyone from having to filter through the massive annoying lines of useless code

There are 4 lines of code under class account that are throwing me errors.

class account
{
	private:
		string cust_name;
		char account_type;
		
	public:
		void get_cust_name()
		{
			cout << "\n\nEnter Customer Name : ";
			cin >> cust_name;
		}
		void main_menu()
		{
			//Displays Main menu
		}
		void new_account()
		{
			char ch;
			cout << "\n\nWhat type of account would you like to add (c for checking, s for savings)";
			cin >> ch;
			if(ch == 'c' || ch == 'C')
			{
// Error line		check.new_chk_account();
			}
			if(ch == 's' || ch == 'S')
			{
// Error line		save.new_sav_account();
			}
			main_menu();
		}
		void display_all()
		{
// Error line	cout << "Checking Account Information:\n"; //<< check.chk_balance << endl;
// Error line	cout << "Savings Account Information:\n"; //<< save.sav_balance << endl; 
			main_menu();
		}
};


class check : public account
{
	private:
		int chk_account_num;
		double chk_acc_bal;

	public:
		//Checking account functions
		void chk_acc()
		{
			//Displays checking account menu
		}
		void chk_deposit()
		{
		}
		void chk_withdraw()
		{
		}
		void chk_transfer()
		{
		}
		void chk_balance()
		{
		}
		void month_fee()
		{
		}
		void new_chk_account()
		{
		}
};

class save : public account
{
	private: 
		int sav_account_num;
		double sav_acc_bal;
		
	public:
		//Savings account functions
		void sav_acc()
		{
			//Savings account menu
		} 
		void sav_deposit()
		{
		}	
		void sav_withdraw()
		{
		}	
		void sav_transfer()
		{
		}
		void sav_balance()
		{
		}
		void intrest()
		{
		}
		void min_req()
		{
		}	
		void new_sav_account()
		{
		}
		
};

I was thinking of using pointers, but this entire code might be useless and having to scrap this would be a suprise.