CHttpFile乱码问题

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代码:

#include "iostream"
#define _AFXDLL
#define UNICODE
#define _UNICODE
#include "string"
#include "afx.h"
#include "afxinet.h"
using namespace std;

string Unicode2Ansi(wchar_t* wstr) {
    int len = WideCharToMultiByte(CP_ACP,WC_COMPOSITECHECK,wstr,-1,NULL,0,NULL,NULL);
    char* tmps = new char[len];
    WideCharToMultiByte(CP_ACP,WC_COMPOSITECHECK,wstr,-1,tmps,len,NULL,NULL);
    string ss = tmps;
    delete [] tmps;
    return ss;
}

int main() {
    CInternetSession sess(_TEXT(""));
    CHttpFile* file = (CHttpFile*)sess.OpenURL(_TEXT("http://www.baidu.com"));
    CString str;
    while (file->ReadString(str)) {
   
        cout << Unicode2Ansi(str.GetBuffer()) << endl;
    }
    file->Close();
    cin.get();
    return 0;
}