封裝lib、dll

//MYDLL.h
class _declspec(dllexport) MyDll
{
public:
	MyDll();
	~MyDll();
	bool MyDllInit();
	int add(int a, int b);
};

//MYDLL.cpp
#include <iostream>
#include "MYDLL.h"

MyDll::MyDll()
{
	std::cout << "MyDll()" << std::endl;
}

MyDll::~MyDll()
{
	std::cout << "~MyDll()" << std::endl;
}

bool MyDll::MyDllInit()
{
	std::cout << "MyDllInit()" << std::endl;
	return true;
}

int MyDll::add(int a, int b)
{
	return a + b;
}

class _declspec(dllimport) MyDll
{
public:
	MyDll();
	~MyDll();
	bool MyDllInit();
	int add(int a, int b);
};

#include "MYPRO.h"
#include <iostream>

#pragma comment(lib,"..\\Debug\\MYDLL.lib")

MyDll mydll;

int main()
{
	mydll.MyDllInit();
	std::cout << mydll.add(3, 4) << std::endl;

	return 0;
}

https://www.cnblogs.com/chechen/p/8676226.html