dll导出函数

#include<stdio.h>
//引用库的时候必须包含两个文件

#include"../exportDll2/exportDll2.h"//1.头文件

int main()
{
	int result;
	result = Add(1, 2);
	printf("%d", result);
	return 0;
}

 报错：

 

 修改：

#include<stdio.h>
//引用库的时候必须包含两个文件

#include"../exportDll2/exportDll2.h"//1.引用头文件，函数声明
#pragma comment(lib,"../Debug/EXPORTDLL2.lib")//2.引用库文件，引用静态库的方式， 函数实现
int main()
{
	int result;
	result = Add(1, 2);
	printf("%d", result);
	return 0;
}

 源文件：

exportDll2.h

// The following ifdef block is the standard way of creating macros which make exporting
// from a DLL simpler. All files within this DLL are compiled with the EXPORTDLL2_EXPORTS
// symbol defined on the command line. This symbol should not be defined on any project
// that uses this DLL. This way any other project whose source files include this file see
// EXPORTDLL2_API functions as being imported from a DLL, whereas this DLL sees symbols
// defined with this macro as being exported.
#ifdef EXPORTDLL2_EXPORTS
#define EXPORTDLL2_API __declspec(dllexport)
#else
#define EXPORTDLL2_API __declspec(dllimport)
#endif



EXPORTDLL2_API int fnexportDll2(void);
EXPORTDLL2_API int Add(int a, int b);

 eportDll2.cpp

// exportDll2.cpp : Defines the exported functions for the DLL.
//

#include "pch.h"
#include "framework.h"
#include "exportDll2.h"



// This is an example of an exported function.
EXPORTDLL2_API int fnexportDll2(void)
{
    return 0;
}

EXPORTDLL2_API int Add(int a, int b)
{
	return a+b;
}

 创建具有导出项的dll文件时，在Debug中会生成两个文件，一个是dll文件，一个是lib文件

 

 系统自动将库文件名改为大写