Thread: Help with Money-owed Bank

So I've worked on my first big program in a DOS Screen, it's where you input a command and it'll return the function defined with it (duh) It's not working for some reason though.

Code for main.cpp

Code:

#include <fstream>
#include <stdlib.h>
#include <iostream>

using namespace std;

//Storing code: "int args, char *argv[]"
int main()
{
    int input;
    float moneyvar;
    char naming_interger;
    float new_money;
    float math;
    int input2;
    
    cout<< "Welcome to the Payback Bank!\nType new to create an account.\nType get to see a file.\nType change to add or subtract money owed.\nType clear to clear all owed money from an account.";
    cin>> input;
    cin.ignore();
    switch ( input )
    {
           case 'NEW':
                cout<< "Who owes you money? Please type the name:\n";
                cin>> naming_interger;
                ofstream new_account(naming_interger".dat");
                cout<< "The person who owes you money is "<< naming_interger<< "\nHow much are you owed?";
                cin>> new_money;
                cin.ignore();
                cout<< "Writing money to file...";
                new_account << new_money;
                cout<< "Done! The process was successful!\n";
                cout<< "The person "<< naming_interger<< " owes you "<< new_money<< "\n";
                new_account.close();
                system("PAUSE");
                return 0;
                break;
           case 'GET':
                cout<< "Who's account would you like to view?\n";
                cin>> naming_interger;
                cin.ignore();
                ifstream read_account(naming_interger".dat");
                if (read_account.fail())
                {
                    cout<< "There was an error, perhaps the file doesn't exist?\n";
                    system("PAUSE");
                }
                cout<< naming_interger<< " owes you "<< read_account<< "\n";
                read_account.close;
                system("PAUSE");
                break;
           case 'CHANGE':
                cout<< "Who's account are you changing?";
                cin>> naming_interger;
                cin.ignore();
                ifstream change_account(naming_interger".dat");
                change_account>> moneyvar;
                if (read_account.fail())
                {
                    cout<< "There was an error, perhaps the file doesn't exist?\n"<<;
                    system("PAUSE");
                }
                cout<< "You loaded "<< naming_interger<< "'s account.\nHe/She owes you"<< moneyvar<< "\nHow much do you want to add? (HINT: Place a - to subtract)\n";
                cin>> math;
                cin.ignore();
                cout<< "Adding money to account, please wait...\n";
                moneyvar = moneyvar + math;
                ofstream update_account(naming_interger".dat");
                moneyvar>> update_account;
                update_account.close;
                cout<< "The account update was succesful!\n";
                system("PAUSE");
                break;
           case 'CLEAR':
                cout<< "Who paid back your money?\n";
                cin>> naming_interger;
                cin.ignore();
                ifstream clear_account(naming_interger".dat");
                clear_account>> moneyvar;
                {
                    cout<< "There was an error, perhaps the file doesn't exist?\n"<<;
                    system("PAUSE");
                }
                cout<< "You loaded "<< naming_interger<< "'s account.\n";
                cout<< "Clear this account's data? (y/n)This does NOT erase the account.\n";
                cin>>input2;
                if (input == y)
                {
                          cout<< "Erasing owed money data.";
                          moneyvar = 0;
                          ofstream clearing_account(naming_interger".dat");
                          clearing_account.close
                          cout<< "The account's owed money was cleared successfully!\n";
                          system("PAUSE");
                }
                else
                {
                    return 0;
                }
                break;
           default:
                   {
                          cout<< "Failure to read command.\n";
                          system("PAUSE");
                          break;
                   }
           }
    }
}

ofstream new_account(naming_interger".dat"); is where it mainly fails to compile, I am using Dev-C++ 4.9.9.2.
My guess is that you can't store a variable into a file's name, but I want to, can I get some help here?
What this program's plot is is it loads and saved accounts on how much money somone owes you.