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void CMdSpi::SubscribeMarketData()
{
int iResult = pUserApi->SubscribeMarketData(ppInstrumentID, iInstrumentID);
cerr << "--->>> 发送行情订阅请求: " << ((iResult == 0) ? "成功" : "失败") << endl;
///////////yx//////////////////
CThostFtdcDepthMarketDataField dataField;
memset(&dataField, 0, sizeof(dataField));
OnRtnDepthMarketData(&dataField);
}