oh.cpp

#include <iostream>
#include <fstream>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>

using namespace std;

int main() {

struct termios oldt, newt;
char ch, command[20];
int oldf;

tcgetattr(STDIN_FILENO, &oldt);
newt=oldt;
newt.c_lflag &= ~(ICANON | ECHO);
tcsetattr(STDIN_FILENO, TCSANOW, &newt);
oldf = fcntl(STDIN_FILENO, F_GETFL, 0);
fcntl(STDIN_FILENO, F_SETFL, oldf | O_NONBLOCK);

cout << "The precess can takes hours to even days to complete. To proceed, press ENTER else press CTRL+C to exit.\n";

char cha = 0x0;

while (cha != 0x0A) {
 cha = getchar();
}

cout << "\nOpening file oh.txt for writing\n";
ofstream myfile;
myfile.open("oh.txt");

cout << "Writing to file\n";

 myfile << 'o';
 
// string c = "4294967295"; // 32-bit
string c = "18446744073709551615"; // 64-bit

for (uint64_t b = 0; 2^64-1; b++) {
 myfile << 'h';
 
 printf("\r");
 
 cout << b << "/" << c << " bytes written";
 
 if (getchar() == 'q') break;
}

cout << "\nDone! Closing stream\n";
myfile.close();

tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
fcntl(STDIN_FILENO, F_SETFL, &oldt);

return 0;

}