Transform help

This is a discussion on Transform help within the C++ Programming forums, part of the General Programming Boards category; I am doing lab for homework, I have the code seemingly correct except when I compile I get an error: ...

  1. #1
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    Transform help

    I am doing lab for homework, I have the code seemingly correct except when I compile I get an error:

    hangman.cpp no matching function for call to `transform(__gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, <unknown type>)'

    Headers etc..
    Code:
    #include <iostream>
    #include <algorithm>
    #include <string>
    
    using namespace std;
    using std::transform;
    int main ()
    {
        // declare variables
        string origWord   = "";
        string letter     = "";
        char dashReplaced = 'F';
        char gameOver     = 'F';
        int numIncorrect = 0;
        string guessWord = "-----";
    transform itself. I can post more parts if this does not show enough.

    Code:
     transform(origWord.begin(), origWord.end(), origWord.begin(), toupper);
    Not sure why it is doing this, this is the only error (there are 2 transforms and both get same error)

  2. #2
    a_capitalist_story
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    Does it work with the global ::toupper?

  3. #3
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    using std::toupper? No same error.

  4. #4
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    Code:
     transform(origWord.begin(), origWord.end(), origWord.begin(), tolower);
    I tried this way too, to double check. Same error.

  5. #5
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    It doesn't like toupper, because it's ambiguous. Try:

    Code:
    transform(origWord.begin(), origWord.end(), origWord.begin(), (int(*)(int)) toupper) );
    Source: http://www.devx.com/getHelpOn/Article/9702/1954
    Last edited by syzygy; 04-27-2010 at 05:26 PM.

  6. #6
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    Crap that works perfect. Wonder why the book was wrong? Or could it be that I left something else out?
    Thanks for your help.

  7. #7
    Registered User hk_mp5kpdw's Avatar
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    Maybe:
    Code:
    #include <cctype>
    ... might help to include the header that actually contains the prototype for that function.
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

  8. #8
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    Nope, I changed it back and added the cctype header and got the same error. I thought it (toupper) was covered under <iostream>? Tranform is supposed to be <algorithm>

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