Quickly fill up ram in c++

hungry.cpp

#include <iostream>
#include <string>
#include <unistd.h>
// This program will fill your memory by creating a very large string
using std::cout;
void print_info(std::string s)
{
  cout << "Capacity: " << s.capacity() << '\n'; // Let's not use std::endl unless we want a new buffer only for that :)
  cout << "Size: " << s.size() << '\n';
  cout << "Max size: " << s.max_size() << '\n';

}
int main()
{
    std::string s = "start"; // s of type string
    print_info(s);
    cout << "Ok now (in 5 seconds) let's start the fun\n";
    sleep(5);
    for (int i = 0; i < 100; i++)
    {
      s+=s;
      cout << "Capacity: " << s.capacity() << '\n'; // outputs the buffers (memory blocks) the string s is currently occuping
      cout << "Length: " << s.length() << '\n'; // Outputs string length
    }
    return 0; // finish program
}
// Thanks to Cisco with their free C++ course "Programming essentials in C++" chapter (4.4.1.5)