what is the problem in my file handling program? - c++

Question

I have written the following code
switch (number) {
case 1:
int accountnumber[20];
char firstname[20], lastname[20], balance[20];
cout << "please enter the account number of the user " << endl;
cin.getline(accountnumber, 20);
cout << "please enter the first name of the user " << endl;
cin.getline(firstname, 20);
cout << "please enter the last name of the user " << endl;
cin.getline(lastname, 20);
cout << "please enter the balance of the user " << endl;
cin.getline(balance, 20);
ofstream myfile(" data.txt");
myfile << accountnumber;
myfile.close();
int accountnumber1[20];
ifstrean.obj("data.txt");
obj.getline(accountnumber1, 20);
cout << "data is" << accountnumber1;
obj.close();
}
It is showing the following errors
no matching function for call to 'std::basic_istream<char>::getline(int[20], int) '
expected unqualified-id before'.' token
What are the mistakes that I am doing?

Answer 1

The problem is "accountnumber[20]" on line 4 is an integer array and you pass it to cin.getline on line 10, when it expects a char array instead. Since you're using a char array for numeric values such as balance, you might wanna consider making your account number into a char array as well.
int accountnumber[20];
char firstname[20],
lastname[20], balance[20];
becomes
char accountnumber[20], firstname[20], lastname[20], balance[20];
The formatting on your code is also really unconventional, you might want to stick to something more common for making it easier for anyone to read it.