MFC CString 转 char*

/// <summary>
/// CString 转 char*
/// </summary>
/// <param name="str">输入CString类型</param>
/// <returns>转换后的char*类型</returns>
char* CStringToCharArray(CString str)
{
    
    int n;
    n = WideCharToMultiByte(CP_OEMCP, 0, str, -1, NULL, 0, 0, FALSE);  //宽字节转多字节
    char* SendInt = new char[n];
    memset(SendInt, 0, n * sizeof(char));    //初始化pSend
    WideCharToMultiByte(CP_OEMCP, 0, str.GetBuffer(0), n, SendInt, n, 0, FALSE);
    str.ReleaseBuffer();    //释放缓存
    return SendInt;
}