Multiple lines outputting in files

[KeilyMorrison]

The commands write_ account () is supposed to input the lines “account.dat” file while doing the access create_ account() in the class amount. I want to an imput of multiple arguments of the create_ account in the “account.dat” file then do the display of this files on the screen using the command display_ sp () and the show_ account () is the file.write wrong? Am interested in making this happen in a binary. Can it be done?

Am actually not able to move beyond (file.good) error.

#include <iostream>
#include<fstream>
#include<iomanip>
#include<cctype>
using namespace std;

class account{
  int accno;
  char name[50];
  int deposit;
  char type;
  public:
  void create_account();
  int repacno(); 
  void dep(int);
  void show_account();
  };
   
 void account::create_account()
 {  
   cout<<"\nEnter Account No.\n";
   cin>>accno;
   cout<<"\nAccount Holder Name: \n";
   cin.ignore();
   cin.getline(name, 50);
   cout<<"\nChoose type of account: CURRENT/SAVING (C/S) :\n";
   cin>>type;
   cout<<"\nEnter initial amount to deposit\n";
   cin>>deposit;
   cout<<"\nAccount created....\n";
 }
 void account::dep(int x){
   deposit+=x;
   
 }
 void account::show_account(){
   cout<<"\nAccount no.\n"<<accno;
   cout<<"\nHolder name:\n";
   cout<<name;
   cout<<"\nbalance:\n"<<deposit;
 }
 int  account::repacno(){
   return accno;
 }


void write_account();
void display_sp(int); 

int main()
{
  int choice;
  int num;
  do{
     cout<<"\n\n MAIN MENU\n";
     cout<<"\n1) create account\n";
     /*cout<<"\n2) deposit\n";*/
     cout<<"\n2) Enquiry\n";
     cout<<"\n3) EXIT>>\n";
     cin>>choice;
     switch(choice)
     {
       case 1: write_account();
         break;
         
       /*case 2: cout<<"\nEnter acc. no.\n";
         cin>>num;
         deposit_money(num );
         break;*/
        
       case 2: cout<<"\nEnter acc. no.\n";
         cin>>num;
         display_sp(num);
         break;
         
       case 3: cout<<"\nthanks\n";
         break;
         
       default: cout<<"\ndefault\n";
         break;
     }
     cin.ignore();
     cin.get();
   }while(choice!=3);
   return 0;
}




//****************
void write_account()
  {
    account ac;
    ofstream file;
    file.open("account.dat", ios::binary| ios::out| ios::app);
    ac.create_account();
    file.write((char *) &ac, (sizeof(account)));
      if(!file.good()) {
      cout << "Error occurred at writing time!" << endl;
      }
   }
  //***************
    
void display_sp(int n){
    account ac;
  bool flag=false;
  fstream file;
  file.open("account.dat",ios::binary| ios::in);
  if(!file)
  {
    cout<<"File could not be open !! Press any Key...";
    return;
  }
  cout<<"\nBALANCE DETAILS\n";

while (!flag && file.read((char*)&ac, sizeof(account)))
        if (ac.repacno() == n) {
            ac.show_account();
            flag = true;
        }

    if (!flag)
        cout << "\n\nAccount number does not exist";
getch();
  }

https://www.theengineeringprojects.com/2019/11/introduction-to-access-modifiers-in-c.html

[seeplus]

Perhaps:

#include <iostream>
#include <fstream>

using namespace std;

class account {
	int accno{};
	char name[50]{};
	int deposit{};
	char type{};

public:
	void create_account();
	int repacno();
	void dep(int);
	void show_account();
};

void account::create_account() {
	cout << "\nEnter Account No: ";
	cin >> accno;

	cout << "Account Holder Name: ";
	cin.ignore();
	cin.getline(name, 50);

	cout << "Choose type of account: CURRENT/SAVING (C/S): ";
	cin >> type;

	cout << "Enter initial amount to deposit: ";
	cin >> deposit;

	cout << "\nAccount created....\n";
}

void account::dep(int x) {
	deposit += x;
}

void account::show_account() {
	cout << "\nAccount no:  " << accno;
	cout << "\nHolder name:  " << name;
	cout << "\nbalance:  " << deposit;
}

int account::repacno() {
	return accno;
}

void write_account();
void display_sp(int);
void display_all();

int main() {
	int choice{};

	do {
		cout << "\n\n MAIN MENU\n";
		cout << "\n1) create account";
		/*cout<<"\n2) deposit\n";*/
		cout << "\n2) Enquiry";
		cout << "\n3) Show all accounts";
		cout << "\n4) EXIT>>";
		cout << "\nEnter options: ";
		cin >> choice;

		switch (choice) {
		case 1:
			write_account();
			break;

			/*case 2: cout<<"\nEnter acc. no.\n";
			  cin>>num;
			  deposit_money(num );
			  break;
			  */

		case 2:
		{
			int num{};

			cout << "\nEnter acc. no: ";
			cin >> num;

			display_sp(num);
		}
			break;

			case 3:
				display_all();
				break;

		case 4:
			cout << "\nthanks\n";
			break;

		default:
			cout << "\nInvalid option\n";
			break;
		}

	} while (choice != 4);
}

//****************
void display_all() {
	ifstream file("account.dat", ios::binary);

	if (!file)
		cout << "File could not be opened\n";
	else
		for (account ac; file.read((char*)&ac, sizeof(account)); ) {
			ac.show_account();
			cout << '\n';
		}
}

//****************
void write_account() {
	ofstream file("account.dat", ios::binary | ios::app);

	if (!file)
		cout << "Cannot open account file\n";
	else {
		account ac;

		ac.create_account();
		if (!file.write((char*)&ac, sizeof(account)))
			cout << "Error occurred at writing time!\n";
	}
}

//***************
void display_sp(int n) {
	ifstream file("account.dat", ios::binary);

	if (!file) {
		cout << "File could not be opened\n";
		return;
	}

	bool flag{};

	for (account ac; !flag && file.read((char*)&ac, sizeof(account)); )
		if (ac.repacno() == n) {
			cout << "\nBALANCE DETAILS\n";
			ac.show_account();
			flag = true;
			break;
		}

	if (!flag)
		cout << "Account number does not exist\n";
}

 MAIN MENU

1) create account
2) Enquiry
3) Show all accounts
4) EXIT>>
Enter options: 1

Enter Account No: 123
Account Holder Name: qwe oiu
Choose type of account: CURRENT/SAVING (C/S): c
Enter initial amount to deposit: 100

Account created....


 MAIN MENU

1) create account
2) Enquiry
3) Show all accounts
4) EXIT>>
Enter options: 1

Enter Account No: 234
Account Holder Name: poi uyt
Choose type of account: CURRENT/SAVING (C/S): s
Enter initial amount to deposit: 200

Account created....


 MAIN MENU

1) create account
2) Enquiry
3) Show all accounts
4) EXIT>>
Enter options: 3

Account no:  123
Holder name:  qwe oiu
balance:  100

Account no:  234
Holder name:  poi uyt
balance:  200


 MAIN MENU

1) create account
2) Enquiry
3) Show all accounts
4) EXIT>>
Enter options: 2

Enter acc. no: 123

BALANCE DETAILS

Account no:  123
Holder name:  qwe oiu
balance:  100

 MAIN MENU

1) create account
2) Enquiry
3) Show all accounts
4) EXIT>>
Enter options: 345

Invalid option


 MAIN MENU

1) create account
2) Enquiry
3) Show all accounts
4) EXIT>>
Enter options: 2

Enter acc. no: 345
Account number does not exist


 MAIN MENU

1) create account
2) Enquiry
3) Show all accounts
4) EXIT>>
Enter options: 4

thanks