Re: Best way to print a currency with an ostream?

On 11/24/2010 5:53 PM, red floyd wrote:


With typos corrected:

#include <ostream>
#include <iomanip>
class currency {
    public:
      // note that I'm using 'E' for the Euro symbol
      currency(int val, const char * type = "E")
        : val_(val), type_(type) { }
      friend std::ostream& operator<<(
           std::ostream&, const currency &);
    private:
      int val_;
      const char* type_;
};

std::ostream& operator<<(std::ostream& os,
                          const currency& curr)
{
     os << curr.type_
        << (curr.val_ / 100)
        << '.'
        << std::setw(2)
        << std::setfill('0')
        << (curr.val_ % 100);
     return os;
}

#include <iostream>

int main()
{
     // 1.08 Euros
     std::cout << currency(108) << std::endl;

     // 1.08 US dollars
     std::cout << currency(108,"$") << std::endl;

     // 1.08 Australian dollars
     std::cout << currency(108,"A$") << std::endl;

     return 0;
}