Overloaded operator[] question

This is a discussion on Overloaded operator[] question within the C++ Programming forums, part of the General Programming Boards category; I have a simple question but could find the answer in a thread... I have a myString class and overloaded ...

  1. #1
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    Overloaded operator[] question

    I have a simple question but could find the answer in a thread...

    I have a myString class and overloaded the operator[] with
    Code:
    char& operator[](unsigned int index);
    const char& operator[](unsigned int index) const;
    (Actually it's the same as in the vector class: http://www.cppreference.com/cppvecto...operators.html)

    In my main Routine I have the following:
    Code:
    myString test("hello");
    test[0]='c';
    printf("%c\n", test[0]);
    My question is, why in both cases only the first overloaded function is called... Is there a way to separate assignment and return-value?

    Greetings, Dee

  2. #2
    Frequently Quite Prolix dwks's Avatar
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    printf is C. My guess is that it takes a char, not a const char. Try writing your own function:
    Code:
    void function(const char c) {
        cout << c;  // or printf
    }
    Can you even do that?
    dwk

    Seek and ye shall find. quaere et invenies.

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  3. #3
    Frequently Quite Prolix dwks's Avatar
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    Wait, I have it. Use a const object and see if the second operator[] is called.
    dwk

    Seek and ye shall find. quaere et invenies.

    "Simplicity does not precede complexity, but follows it." -- Alan Perlis
    "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra
    "The only real mistake is the one from which we learn nothing." -- John Powell


    Other boards: DaniWeb, TPS
    Unofficial Wiki FAQ: cpwiki.sf.net

    My website: http://dwks.theprogrammingsite.com/
    Projects: codeform, xuni, atlantis, nort, etc.

  4. #4
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    Thanks for your answer... Yes, that was my problem. I misinterpreted the way opf the second function! It will work when I use a const object...

    Greetings, Dee

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