C++调用动态库两种方式和Python调用C++动态库

# cat.h
#pragma once
extern "C" _declspec(dllexport) int sum(int a, int b);

# cat.cpp
#include "pch.h"
#include "cat.h"
extern "C" _declspec(dllexport) int sum(int a, int b) {
return a + b;
}

#include 
#include "../../CATDLL/CATDLL/cat.h"
using namespace std;
#pragma comment(lib, "CATDLL.lib")
int main() {
cout << sum(1, 2) << endl;
return 0;
}

#include 
#include 
using namespace std;
typedef int (*PSUM)(int, int);
int main() {
HMODULE hMoudle = LoadLibrary(TEXT("CATDLL.dll"));
PSUM psum = (PSUM)GetProcAddress(hMoudle, "sum");
cout << psum(4, 5) << endl;
FreeLibrary(hMoudle);
return 0;
}

import os
from ctypes import *
os.chdir("D:Cat课件CAT_codingC++项目开发MFC进阶和动态库注入辅助PYTEST")
dll = cdll.LoadLibrary("CATDLL.dll")
ret = dll.sum(1, 2)
print(ret)