Adding onto an output file?

Question

Is it possible to use a function prototype to add onto your output file for fstream? Say for example:
#include <iostream>
#include <fstream>
using namespace std;
void output();
int main()
{
ofstream output(“test.txt”);
output << “Hello”;
output();
return 0;
}

void output()
{
output << “world”;
}

How do I allow it edit the file using function prototypes? Should I refer with ofstream variable? My function has to be like this where it outpus from main and a file. Help please

Answer 1

write prototype of the function like this:
void output(ofstream &output);

and call in main:
output(output);

so it works as you want.

Answer 2

The way that works is if you used ofstream outfile (“filename.txt”, ios::app). This will allow u to open the same file in different functions