Overwriting text file in C++

Question

I have created a banking program in C++ and every time a user creates account their details are to be stored into a text file. I have created the code that does this, but when I create the first account it will store the information, and when I create the second it overwrites it, which is not what I want to to do yet.

Here is the code I am using:

ofstream myfile; 
myfile.open("test.txt"); //open myfile.txt
myfile << setw(10) << "=Account Number=" << setw(20) << "=Customer Name=" << setw(20) << "=Balance=" << endl;
myfile << "=========================================================================================";
myfile << setw(10) << Account_no << setw(20) << name << setw(20) << address << setw(20) << intialAmount; //send values
myfile.close();//close file

How can I get it to move to a new line after the first customer has been created?

Answer 1

Constructor of ofstream takes a mode option ( see here ). So open it like :

ofstream myfile("test.txt",std::ofstream::app);

Answer 2

To build upon Kiroxas's code, this one first checks if there's already a customer:

#include <iostream>
#include <fstream>
#include <iomanip>

using namespace std;

int main()
{
    ifstream fil("test.txt");

    string f((istreambuf_iterator<char>(fil)), istreambuf_iterator<char>()); 
    //read into string

    fil.close();

    if (f.length() < 1) // if no previous customer in file
    {

    ofstream myfile;

    myfile.open("test.txt");

    myfile << setw(10) << "=Account Number=" << setw(20) << "=Customer Name=" 
    << setw(20) << "=Balance=" << endl; 

    myfile << "============================================" 
           << "============================================="; 

    myfile << setw(10) << Account_no << setw(20) 
           << name << setw(20) << address 
           << setw(20) << intialAmount; //send values to start of file

    myfile.close(); //close file

    }

    else //if file contains previous customer
    {
        ofstream myfile;

        myfile.open("test.txt", ios::app); 
        //ios::app tells it to write to the end of the file

        myfile << setw(10) << "=Account Number=" << setw(20) 
               << "=Customer Name=" 
               << setw(20) << "=Balance=" 
               << endl;

        myfile << setw(10) << Account_no << setw(20) 
               << name << setw(20) << address 
               << setw(20) << intialAmount; //send values 
    }
}

NOTE:

One

ios::app has the same function as std::ofstream::app , it's just shorter!

Two

Do not expect it to compile because I have not declared your account info variables ( Account_no and et cetera). Until you declare them, it won't compile...