windows中文操作系统下，vs的c++项目默认编码是GB2312
python默认是utf-8编码
最好在c++程序顶上加：
#pragma execution_character_set("GB2312")
c++中的字符串一定就是gbk编码
传入python前要做编码转换
准备一个gbk转utf8的函数，如下（网上的）：
string GbkToUtf8(const char* src_str)
{
int len = MultiByteToWideChar(CP_ACP, 0, src_str, -1, NULL, 0);
wchar_t* wstr = new wchar_t[len + 1];
memset(wstr, 0, len + 1);
MultiByteToWideChar(CP_ACP, 0, src_str, -1, wstr, len);
len = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL);
char* str = new char[len + 1];
memset(str, 0, len + 1);
WideCharToMultiByte(CP_UTF8, 0, wstr, -1, str, len, NULL, NULL);
string strTemp = str;
if (wstr) delete[] wstr;
if (str) delete[] str;
return strTemp;
}
示例性代码：
#pragma execution_character_set("GB2312")
#include <stdlib.h>
#include <Windows.h>
#include <iostream>
#include <Python.h>
#include <string>
#include <atlstr.h>
using namespace System;
using namespace System::Runtime::InteropServices;
using namespace System::Collections::Generic;
using namespace System::Diagnostics;
using namespace System::Threading;
using namespace std;
int main()
{
const char* name = "东方红1号";
Py_Initialize();//初始化python
PyRun_SimpleString("import sys");
PyRun_SimpleString("sys.path.append('./')");
PyObject* pModule = PyImport_ImportModule("hello");
PyObject* pFunc1 = PyObject_GetAttrString(pModule, "sayhello");
PyObject* pArgs = PyTuple_New(1);
PyObject* pV1 = Py_BuildValue("s", GbkToUtf8(name).c_str());
PyTuple_SetItem(pArgs, 0, pV1);
PyObject* result = PyObject_CallObject(pFunc1, pArgs);
Py_Finalize();
return 0;