C++封装成DLL并调用的实现

#include "pch.h"
#include<iostream>
class FHello :public IInterface
{
public:
	FHello();
	virtual void Init();
	virtual void Destroy();
	virtual char* GetName();

private:
	char name[1024];

};

FHello::FHello()
{
	memset(name, 0, 1024);
	strcpy(name, "hello");
}

void FHello::Init()
{
	printf("FHello::Init\n");
}

void FHello::Destroy()
{
	printf("FHello::Destroy\n");
}

char* FHello::GetName()
{
	return name;
}

IInterface* IInterface::CreateInterface()
{
	return new FHello();
}

#ifndef PCH_H
#define PCH_H
#define _CRT_SECURE_NO_WARNINGS

#define FENGZHUANGCPP_API __declspec(dllexport) //导出

//动态链接库
class FENGZHUANGCPP_API IInterface
{
public:
	static IInterface* CreateInterface();
	virtual void Init() = 0;
	virtual void Destroy() = 0;
	virtual char *GetName() = 0;
};

#endif //PCH_H

#include "dlllib/pch.h"
#include <iostream>
using namespace std;
#pragma comment(lib,"dLLL.lib")
//动态库在运行时，会把代码链接到目标
//静态库在编译期，会把代码链接到目标

int main()
{
    IInterface* IF = IInterface::CreateInterface();
    cout << IF->GetName() << endl;
    IF->Init();
    IF->Destroy();
    return 0;
}