extern "C" _declspec(dllexport) int Plus(int x, int y);

extern "C" _declspec(dllexport) int Sub(int x, int y);

extern "C" _declspec(dllexport) int Mul(int x, int y);

extern "C" _declspec(dllexport) int Div(int x, int y);

int Plus(int x, int y)

{

    return x + y;

}

int Sub(int x, int y)

{

    return x - y;

}

int Mul(int x, int y)

{

    return x * y;

}

int Div(int x, int y)

{

    return x / y;

}

// def文件里面
EXPORTS

Plus @

Sub @

Mul @ NONAME   // (此种方式只导出序号)

Div @

// CPP文件里面
int Plus(int x, int y)

{

    return x + y;

}

int Sub(int x, int y)

{

    return x - y;

}

int Mul(int x, int y)

{

    return x * y;

}

int Div(int x, int y)

{

    return x / y;

}

// 先把TestDll.lib 和 TestDll.dll放在main.cpp 同一目录下
#include <stdio.h>

#pragma comment(lib, "TestDll.lib")

extern "C" _declspec(dllimport) int Plus(int x, int y);

extern "C" _declspec(dllimport) int Sub(int x, int y);

extern "C" _declspec(dllimport) int Mul(int x, int y);

extern "C" _declspec(dllimport) int Div(int x, int y);

int main()

{

    int d = Plus(, );

    printf("%d", d);

    getchar();

    return ;

}

#include <stdio.h>

#include <windows.h>

int main()

{

    // 定义函数指针

    typedef int(*lpPlus)(int, int);

    typedef int(*lpSub)(int, int);

    typedef int(*lpMul)(int, int);

    typedef int(*lpDiv)(int, int);

    // 获取模块句柄

    HMODULE hMoudle = LoadLibrary(L"TestDll.dll");

    // 获取函数地址

    lpPlus MyPlus = (lpPlus)GetProcAddress(hMoudle, "Plus");

    lpSub MySub = (lpSub)GetProcAddress(hMoudle, "Sub");

    lpMul MyMul = (lpMul)GetProcAddress(hMoudle, "Mul");

    lpDiv Mydiv = (lpDiv)GetProcAddress(hMoudle, "Div");

    // 调用

    int d = MyPlus(, );

    printf("%d", d);

    getchar();

    return ;

}