std::string to char*

This is a discussion on std::string to char* within the C++ Programming forums, part of the General Programming Boards category; I'm pretty noobish when it comes to the string class - I used to use char* all the time until ...

  1. #1
    Supermassive black hole cboard_member's Avatar
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    std::string to char*

    I'm pretty noobish when it comes to the string class - I used to use char* all the time until otherwise informed. So how would I convert a string to char*? Although best avoided, would this method *work*:

    Code:
    string str; 
    char* other_str;
     
    cin >> str;
    other_str = new char[str.size() + 1]; // would this work?
    strncpy (other_str, reinterpret_cast<char*> (str), str.size());
     
    delete [] other_str;
     
    // etc...
    I just tapped that out off the top of my head so it's probably either wrong or very noob-esque.

    I would like to know how to do this in case I need to, for example, read user input into a string instance, then pass it to an fopen call (or whatever takes a char*).
    Last edited by cboard_member; 07-15-2005 at 05:40 AM.
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  2. #2
    C++ Witch laserlight's Avatar
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    strcpy() str.c_str()?
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  3. #3
    Supermassive black hole cboard_member's Avatar
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    c_str()? I'll look it up in MSDN. Thanks
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  4. #4
    Registered User major_small's Avatar
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    don't use msdn... use http://www.cppreference.com (they only have standard things... MSDN is sometimes hard to understand, and has alot of non-standard, windows-only things)
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  5. #5
    Supermassive black hole cboard_member's Avatar
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    Lol you were right, MSDN's answer to it was about 4 lines long and almost illegible.
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