Writing a string to the end of a file (C++)

Question

I have a program already formed that has a string that I want to stream to the end of an existing text file. All of what little I have is this: (C++)

 void main() {    std::string str = "I am here";    fileOUT << str; } 

I realize there is much to be added to this and I do apologize if it seems I am asking people to code for me, but I am completely lost because I have never done this type of programming before.

I have attempted different methods that I have come across the internet, but this is the closest thing that works and is somewhat familiar.

Answer 1

Open your file using std::ios::app

 #include <fstream>   std::ofstream out;   // std::ios::app is the open mode "append" meaning  // new data will be written to the end of the file.  out.open("myfile.txt", std::ios::app);   std::string str = "I am here.";  out << str; 

Answer 2

To append contents to the end of files, simply open a file with ofstream (which stands for out file stream) in app mode (which stands for append).

#include <fstream> using namespace std;  int main() {     ofstream fileOUT("filename.txt", ios::app); // open filename.txt in append mode      fileOUT << "some stuff" << endl; // append "some stuff" to the end of the file      fileOUT.close(); // close the file     return 0; }