c++：打开选择文件夹，记录选择的文件的名称

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//头文件是从项目文件拷贝的，看不需要的自己删除（多字节环境下）
#include <Windows.h>
#include <memory>
#include <iostream>
#include <numeric>
#include <list>
#include <cmath>

string Select_file();

int main()
{
string openfilename;

openfilename = Select_file();

return 0;
}
string Select_file()
{
#ifdef _UNICODE
TCHAR szBuffer[MAX_PATH] = { 0 };
OPENFILENAME ofn = { 0 };
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = NULL;
ofn.lpstrFilter = _T("All(*.*)\0*.*\0Text(*.txt)\0*.TXT\0\0");//要选择的文件后缀
//ofn.lpstrInitialDir = _T("D:\\Program Files");//默认的文件路径
ofn.lpstrFile = szBuffer;//存放文件的缓冲区
ofn.nMaxFile = sizeof(szBuffer) / sizeof(*szBuffer);
ofn.nFilterIndex = 0;
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_EXPLORER;//标志如果是多选要加上OFN_ALLOWMULTISELECT
//BOOL bSel = GetOpenFileName(&ofn);
if (GetOpenFileName(&ofn))
{
//wprintf(L"%s\n", ofn.lpstrFile); //ofn.lpstrFile 是地址

/*locale loc("chs"); //输出到控制台
wcout.imbue(loc);
wcout << ofn.lpstrFile << endl;
*/

char szcConv[200];
memset(szcConv, 0, 200 * sizeof(char));

size_t wLen = wcslen(ofn.lpstrFile) + 1; // 宽字符字符长度，+1表示包含字符串结束符
int aLen = WideCharToMultiByte(CP_ACP, 0, ofn.lpstrFile, wLen, NULL, 0, NULL, NULL);

LPSTR lpa = new char[aLen];
WideCharToMultiByte(CP_ACP, 0, ofn.lpstrFile, wLen, lpa, aLen, NULL, NULL);
strcpy_s(szcConv, 200, lpa);
delete[] lpa;
lpa = NULL;
//wcout << szcConv << endl;
//string FileName;
//FileName = szcConv;
//return szcConv;

}

#endif
#ifdef _MBCS

char szFileName[MAX_PATH] = { 0 };
OPENFILENAME openFileName = { 0 };
openFileName.lStructSize = sizeof(OPENFILENAME);
openFileName.nMaxFile = MAX_PATH; //这个必须设置，不设置的话不会出现打开文件对话框
openFileName.lpstrFilter = "(*.MV)\0*.mv\0(*.DLV)\0*.dlv\0All(*.*)\0*.*\0\0";
//此处参考
//https://www.shuzhiduo.com/A/VGzlVpvy5b/
//https://www.cnblogs.com/lkpp/p/OPENFILENAME-lpstrFilter.html
openFileName.lpstrFile = szFileName;
openFileName.nFilterIndex = 1;
openFileName.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
string FileName;
if (::GetOpenFileName(&openFileName))
{
//::MessageBoxA(NULL, openFileName.lpstrFile, "", MB_OK);
//cout << szFileName << endl;

FileName = szFileName;
//cout << FileName << endl;
return FileName;
}

#endif

}