#include <iostream>

#include <string>

#include <tchar.h>

#include <Windows.h>

using namespace std;

//Converting&nbsp;a&nbsp;WChar&nbsp;string&nbsp;to&nbsp;a&nbsp;Ansi&nbsp;string

char *w2c(char *pcstr,const wchar_t *pwstr, size_t len)

{

    int nlength=wcslen(pwstr);

    //获取转换后的长度

    int nbytes = WideCharToMultiByte( , , pwstr, nlength, NULL,,NULL, NULL );

    if(nbytes>len)   nbytes=len;

    // 通过以上得到的结果，转换unicode 字符为ascii 字符

    WideCharToMultiByte( ,, pwstr, nlength,   pcstr, nbytes, NULL,   NULL );

    return pcstr ;

}

int main(){

    setlocale(LC_ALL,"chs");

    char* cc = "this is a char 测试";

    wchar_t* wcc = L"this is a wchar 测试";

    string str("this is a string 测试 ");

    wstring wstr = L"this is a wstring 测试";

    //string to char

    const char* char_test = str.c_str();

    //cout<<"char_test:"<<char_test<<endl;

    //char to string

    string ss = cc;

    //cout<<"ss is :"<<ss<<endl;

    //wstring to wchar

    const wchar_t* wchar_test = wstr.c_str();

    //wcout<<wchar_test<<endl;

    //wchar to wstring

    wstring wss = wcc;

    wcout<<wcc<<endl;

    //char to wchar_t

    wchar_t *wc = new wchar_t[str.size()+];

    //swprintf(wc,L"%S",cc);

    //wcout<<cc<<endl;

    delete []wc;

    // wchar_t to char

    char *pcstr = (char *)malloc(sizeof(char)*( * wcslen(wcc)+));

    memset(pcstr ,  ,  * wcslen(wcc)+ );

    w2c(pcstr,wcc, * wcslen(wcc)+) ;

    free(pcstr);

    system("pause");

    return ;

}