sprintf with dynamic string

This is a discussion on sprintf with dynamic string within the C++ Programming forums, part of the General Programming Boards category; Originally Posted by Ducky Now if i have to reassign the c++ String to a C-string i came back where ...

  1. #16
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by Ducky
    Now if i have to reassign the c++ String to a C-string i came back where i started and
    i just might as well start out with a C string.

    Because the whole point of C++ strings was to not allocate and free memory.
    You could use the &str[0] trick to get a pointer, though that will only be properly well defined in the next version of C++. Alternatively, you could copy the std::string to a std::vector<char>, and then use the &x[0] trick to get a pointer (which you assign to the pointer that should be modified).
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
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  2. #17
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    There you go with the solution!

    I hope this trick doesnt have any undefined behaviour, seeing that its not yet properly defined.

    Thank you Laserlight!
    Compiler MSVC++ 2013 with Code::Blocks.

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