C++ Tutorial/Development/cout justification

#include <iostream>
using namespace std;
int main()
{
  // Use default width.
  cout << "Default format.\n";
  cout << "|";
  cout << 123.45 << "|" << "\n\n";
  // Use default right justification
  cout << "Right-justify in a field width of 12.\n";
  cout << "|";
  cout.width(12);
  cout << 123.45 << "|" << "\n\n";
  return 0;
}

#include <iostream>
using namespace std;
int main()
{
  // Use default width.
  cout << "Default format.\n";
  cout << "|";
  cout << 123.45 << "|" << "\n\n";
  // Switch to left justification.
  cout << "Left-justify in a field width of 12.\n";
  cout.setf(ios::left, ios::adjustfield);
  cout << "|";
  cout.width(12);
  cout << 123.45 << "|" << "\n\n";
  return 0;
}

#include <iostream>
using namespace std;
int main()
{
  // Use default width.
  cout << "Default format.\n";
  cout << "|";
  cout << 123.45 << "|" << "\n\n";
  // Now, use internal.
  cout << "Turning on internal justification.\n";
  cout.setf(ios::internal, ios::adjustfield);
  cout << "Internal justification in a field width of 12.\n";
  cout << "|";
  cout.width(12);
  cout << 123.45 << "|" << endl;
  return 0;
}

#include <iostream>
using namespace std;
int main()
{
  // Use default width.
  cout << "Default format.\n";
  cout << "|";
  cout << 123.45 << "|" << "\n\n";
  // Turn on showpos, use left-justification.
  cout << "Turning on showpos flag.\n";
  cout.setf(ios::showpos);
  cout << "Left-justify set in a field width of 12 again.\n";
  cout << "|";
  cout.width(12);
  cout << 123.45 << "|" << "\n\n";
  return 0;
}