Linking error in httpclient.

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[sullen pewter]

// httpclient.hpp
#ifndef HTTPCLIENT_HPP
#define HTTPCLIENT_HPP

#include <boost/asio.hpp>
#include <iostream>
#include <fstream>
#include <vector>
#include <string>

using boost::asio::ip::tcp;
using boost::system::error_code;

namespace pancakes
{

    class httpclient
    {
        boost::asio::io_context& io_;        // I/O context for networking
        tcp::resolver resolver_;                // required for the endpoints
        tcp::socket socket_;                    // socket
        std::ofstream file_;                    // file output stream
        std::vector<char> buffer_;        // buffer for file output stream
        std::size_t buffer_size_;            // buffer size
        bool header_done_{ false };        // checks if the GET request reached its final header
        std::string request_;                    // request for http GET method
        std::string host_;                        // host for http GET method
        std::string header_accum_;        // accumulation for headers.

    public:
        httpclient(boost::asio::io_context& io, std::size_t buffer_size = 1024);
        void get(const std::string& host, const std::string& path, const std::string& filename);

    private:
        void connect(tcp::resolver::results_type endpoints);
        void request();
        void response();
    };
}

#endif

so far i been getting this linking error ```cpp
Severity Code Description Project File Line Suppression State Details
Error LNK2019 unresolved external symbol "public: void __cdecl pancakes::httpclient::get(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?get@httpclient@pancakes@@QEAAXAEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@00@Z) referenced in function main Download C:\Users\Pancakes\Documents\C++\Project-V\ASIO\Download\main.obj 1