def str_add(str1, str2):
  return int(str1) + int(str2)

cython: language_level=3
cdef public int str_add(const char* str1,const char* str2):
  return int(str1) + int(str2)

#include <Python.h>
#include <Windows.h>
#include "run.h"
extern "C"
{
	__declspec(dllexport) int __stdcall _str_add(const char * a, const char * b) //聲明導出函數(shù)，類，對象等供外面使用
	{
		return str_add(a, b);
	}
}

BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
{
	switch (fdwReason)
	{
	case DLL_PROCESS_ATTACH:
		Py_SetPath(L"D:/chengxuanzhuang/anaconda/envs/python3.6/Lib"); //這個要根據(jù)自己電腦python安裝的位置來
		Py_Initialize();
		//dll初始化的時候調用，這是python3的寫法，python2改成，initrun()。參見生成的run.h
		PyInit_run();
		break;
	case DLL_PROCESS_DETACH:
		Py_Finalize();
		break;
	}
	return TRUE;
}

#include <Windows.h>
#include <iostream>
#include <tchar.h>
using namespace std;
int main()
{
	typedef int(*pAdd)(const char * a, const char * b);
	HINSTANCE hDLL = LoadLibrary(_T("python_to_DLL.dll"));
	cout << "hDLL:" << hDLL << endl;
	if (hDLL)
	{
		// 獲取DLL中需要調用的函數(shù)的地址
		pAdd pFun = (pAdd)GetProcAddress(hDLL, "_str_add");
		cout << "pFun:" << pFun << endl;
		const char* stra = "12";
		const char* strb = "22";
		if (pFun)
		{
			int i = pFun(stra, strb);
			cout << "i = " << i << endl;
		}
	}
	// 調用dll測試
	//將字符變成int然后相加
	system("pause");
	return 0;
}