reads strings entered at the keyboard and writes them to disk

  
#include <iostream>
#include <fstream>
using namespace std;
   
int main(int argc, char *argv[])
{
  if(argc!=2) {
    cout << "Usage: output <filename>\n";
    return 1;
  }
   
  ofstream out(argv[1]); // output, normal file
   
  if(!out) {
    cout << "Cannot open output file.\n";
    return 1;
  }
   
  char str[80];
  cout << "Write strings to disk. Enter ! to stop.\n";
   
  do {
    cout << ": ";
    cin >> str;
    out << str << endl;
  } while (*str != '!');
   
  out.close();
  return 0;
}

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reads strings entered at the keyboard and writes them to disk : ofstream « File « C++

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