void CTraderSpi::OnRspQryTradingAccount(CThostFtdcTradingAccountField *pTradingAccount, CThostFtdcRspInfoField *pRspInfo, int nRequestID, bool bIsLast) { cerr << "--->>> " << "OnRspQryTradingAccount" << endl; cerr << "--->>> " << pTradingAccount->AccountID << endl; if (bIsLast && !IsErrorRspInfo(pRspInfo)) { ///请求查询投资者持仓 ReqQryInvestorPosition(); } } 怎么调用账户数据? 我在交易样例中增加一句输出就出错 cerr << "--->>> " << pTradingAccount->AccountID << endl;