ostream flag : output manipulator « Development « C++ Tutorial

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2. Development
3. output manipulator

#include <iostream>
#include <iomanip>
using namespace std;

ostream &ra(ostream &stream)
{
  stream << "-------------- ";
  return stream;
}

// Left Arrow
ostream &la(ostream &stream)
{
  stream << "*************";
  return stream;
}

int main()
{
  cout << ra << 1233.23 << "\n";
  cout << ra << 567.66 << la;

  return 0;
}

-------------- 1233.23
-------------- 567.66*************"