Overloaded operator "<<"

This is a discussion on Overloaded operator "<<" within the C++ Programming forums, part of the General Programming Boards category; Code: #include <fstream> using std ofstream; . . . ofstream &operator<<(ofstream& stream, const Date& d){ stream << d.getMonth() << '|' ...

  1. #1
    unleashed alphaoide's Avatar
    Join Date
    Sep 2003
    Posts
    696

    Overloaded operator "<<"

    Code:
    #include <fstream>
    using std ofstream;
    .
    .
    .
    ofstream &operator<<(ofstream& stream, const Date& d){
    	stream << d.getMonth() << '|'  //error found here
    	            << d.getDay() << '|'
    	            << d.getYear() << '|';
    
    	return stream;
    }
    The codes above gave me this error.
    e:\jdocument\csci\231\no1\date.cpp(132) : error C2666: '<<' : 13 overloads have similar conversions
    What's weird is when I change all "ofstream" to "ostream" and change to appropriate "include" and "using", it compiles fine.
    So, any idea..???

  2. #2
    lyx
    lyx is offline
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    Sep 2003
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    228
    Which compiler do you use?
    And how is defined the Date class?

    Because, if I try to compile the code below:
    Code:
    #include <fstream>
    using std::ofstream;
    
    struct Date {
        int getMonth() const;
        int getDay() const;
        int getYear() const;
    };
    
    ofstream &operator <<(ofstream& stream, const Date& d)
    {
    	stream << d.getMonth() << '|'  //error found here
    	            << d.getDay() << '|'
    	            << d.getYear() << '|';
    
    	return stream;
    }
    I don't get any error when compiling. But, if I try to use MSVC6, it displays many errors but there are in the STL headers so it's not your fault anyway...

  3. #3
    unleashed alphaoide's Avatar
    Join Date
    Sep 2003
    Posts
    696
    I suspect that the error has got something to do with other parts of my codes, so I guess I have to figure this out myself. Thanks anyway

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