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  1. #16
    2kaud's Avatar
    2kaud is offline Super Moderator Power Poster
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    Dec 2012

    Re: use of algorithms in function cause ERROR: no instance of overloaded function

    I don't understand what you're trying to do in bool_element_option_03() above. You seem to be trying to access a 2-d array as a 1-d array??

    If yes, then something like:

     void bool_element_option_03(const int(&arr_value)[ELEMENTS], int(&arr_copy_value)[ELEMENTS], int(&arr_elements)[ELEMENTS][SLOTS]) {
    	std::copy(std::begin(arr_value), std::end(arr_value), std::begin(arr_copy_value));
    	std::sort(std::rbegin(arr_copy_value), std::rend(arr_copy_value));
    	const auto it { (int*)&arr_elements };
    	for (size_t i {}, ie { ELEMENTS * SLOTS }; i < ie; ++i)
    		std::cout << it[i] << ' ';
    	    // std::cout << *(it + i) << ' ';
    	std::cout << '\n';
    	std::cout << "\nReverse sorted:\n";

    const auto* it { (int*)&arr_elements };
    	for (size_t i {}, ie { ELEMENTS * SLOTS }; i < ie; ++i, ++it)
    		std::cout << *it << ' ';
    but this is 'c' like code and not considered 'good' C++ code.

    Also note that this memory 'hack' for treating a 2d-array as a 1-d isn't valid for std::vector and std::array.
    Last edited by 2kaud; November 29th, 2022 at 06:32 AM.
    All advice is offered in good faith only. All my code is tested (unless stated explicitly otherwise) with the latest version of Microsoft Visual Studio (using the supported features of the latest standard) and is offered as examples only - not as production quality. I cannot offer advice regarding any other c/c++ compiler/IDE or incompatibilities with VS. You are ultimately responsible for the effects of your programs and the integrity of the machines they run on. Anything I post, code snippets, advice, etc is licensed as Public Domain and can be used without reference or acknowledgement. Also note that I only provide advice and guidance via the forums - and not via private messages!

    C++23 Compiler: Microsoft VS2022 (17.5.3)

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