C++ 获取系统版本

float getSysVersion(){

  float f_ret;

  typedef void(__stdcall*NTPROC)(DWORD*, DWORD*, DWORD*);
  DWORD dwMajor, dwMinor, dwBuildNumber;
  NTPROC proc = (NTPROC)GetProcAddress(
    LoadLibrary("ntdll.dll"),
    "RtlGetNtVersionNumbers"
  ); proc(&dwMajor, &dwMinor, &dwBuildNumber); 

  // win 10
  if (dwMajor == 10 && dwMinor == 0){
    f_ret = dwMajor + dwMinor*0.1;
    return f_ret;
  }

  // win 8.1
  if (dwMajor == 6 && dwMinor == 3){
    f_ret = dwMajor + dwMinor*0.1;
    return f_ret;
  }

  // win 8.1 以下
  SYSTEM_INFO info;
  GetSystemInfo(&info);
  OSVERSIONINFOEX os;
  os.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
  #pragma
  if(GetVersionEx((OSVERSIONINFO *)&os)){
    f_ret = os.dwMajorVersion + os.dwMinorVersion*0.1;
  }
  
  return f_ret;
}

效果图：

获取 ReleaseId

string get_systemReleaseId(){
    
    string releaseId = "";
    HKEY hKey_return = NULL;
    char keyValue[256];
    DWORD keySzType;
    DWORD keySize;

    if(ERROR_SUCCESS != RegOpenKeyEx(HKEY_LOCAL_MACHINE,"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\",0,KEY_READ,&hKey_return)){
        cout << "RegOpenKeyEx failed." << endl;
        goto end;
    }
    
    if(ERROR_SUCCESS != RegQueryValueEx(hKey_return,"ReleaseId",0,&keySzType,(LPBYTE)&keyValue,&keySize)){
        cout << "RegQueryValueEx failed." << endl;
        goto end;
    }
    
    releaseId = keyValue;
    
end:
    return releaseId;
}