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    2kaud's Avatar
    2kaud is offline Super Moderator Power Poster
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    Re: use of algorithms in function cause ERROR: no instance of overloaded function

    As a first baby step, move from c-array to std::array and then to std::vector:

    with std:;array:

    Code:
    #include <iostream>
    #include <algorithm>
    #include <array>
    
    constexpr size_t ELEMENTS { 8 };
    
    using Arr = std::array<int, ELEMENTS>;
    
    void show(const Arr& arr) {
    	for (const auto& c : arr)
    		std::cout << c;
    
    	std::cout << '\n';
    }
    
    void bool_element_option_03(const Arr& arr_value, Arr& arr_copy_value) {
    	//std::copy(std::begin(arr_value), std::end(arr_value), std::begin(arr_copy_value));
            arr_copy_value = arr_value;
    	std::sort(std::rbegin(arr_copy_value), std::rend(arr_copy_value));
    
    	std::cout << "\nReverse sorted:\n";
    	show(arr_copy_value);
    }
    
    int main() {
    	const Arr arr_value { 1, 2, 9, 4, 5, 6, 7, 8 };
    	Arr arr_copy_value;
    
    	std::cout << "\nOriginal order:\n";
    	show(arr_value);
    	bool_element_option_03(arr_value, arr_copy_value);
    }
    and then with std::vector:

    Code:
    #include <iostream>
    #include <algorithm>
    #include <vector>
    #include <iterator>
    
    using Arr = std::vector<int>;
    
    void show(const Arr& arr) {
    	for (const auto& c : arr)
    		std::cout << c;
    
    	std::cout << '\n';
    }
    
    void bool_element_option_03(const Arr& arr_value, Arr& arr_copy_value) {
    	//std::copy(std::begin(arr_value), std::end(arr_value), std::back_insert_iterator<Arr>(arr_copy_value));
            arr_copy_value = arr_value;
    	std::sort(std::rbegin(arr_copy_value), std::rend(arr_copy_value));
    
    	std::cout << "\nReverse sorted:\n";
    	show(arr_copy_value);
    }
    
    int main() {
    	const Arr arr_value { 1, 2, 9, 4, 5, 6, 7, 8 };
    	Arr arr_copy_value;
    
    	std::cout << "\nOriginal order:\n";
    	show(arr_value);
    	bool_element_option_03(arr_value, arr_copy_value);
    }
    Note that with std::array and std::vector, you can do a direct assignment without using std:copy().
    Last edited by 2kaud; November 26th, 2022 at 11:24 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 https://creativecommons.org/publicdomain/zero/1.0/ 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 (17.6.5)

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