合约交易是指买卖双方对约定未来某个时间按指定价格接收一定数量的某种资产的协议进行交易。
合约交易的买卖对象是由交易所统一制定的标准化合约，交易所规定了其商品种类，交易时间，数量等标准化信息。The contract represents the rights and obligations of both the buyer and the seller.
To put it simply,we are now about to trade a certain amount of certain commodities at a certain time and place in TAL Education Group
Contract trading is a kind of financial derivatives,which is relative to the Spot market trading.Users can choose to buy long or sell short contracts in futures contract trading by judging the rise and fall of prices to gain gains from rising or falling prices.According to the different delivery methods,contracts can be divided into perpetual contracts and fixed-term contracts.The main difference between the two is that fixed-term contracts have fixed delivery dates,while perpetual contracts do not.
其中定期合约按照交割时间的不同分为三类：当周合约、次周合约和季度合约。
#include<fstream>
#include<iostream>
#include<string>
#include"flatbuffers/idl.h"
#include"flatbuffers/util.h"
int main(){
std::ifstream infile;
infile.open("mobilenet-v1-1.0.mnn",std::ios::binary|std::ios::in);
infile.seekg(0,std::ios::end);
int length=infile.tellg();
infile.seekg(0,std::ios::beg);
char*buffer_pointer=new char[length];
infile.read(buffer_pointer,length);
infile.close();
std::string BasicOptimizer_text;
std::string CaffeOp_text;
std::string GpuLibrary_text;
std::string MNN_text;
std::string Tensor_text;
std::string TensorflowOp_text;
std::string TFQuantizeOp_text;
std::string Type_text;
std::string UserDefine_text;
flatbuffers::LoadFile("BasicOptimizer.fbs",false,&BasicOptimizer_text);
flatbuffers::LoadFile("CaffeOp.fbs",false,&CaffeOp_text);
flatbuffers::LoadFile("GpuLibrary.fbs",false,&GpuLibrary_text);
flatbuffers::LoadFile("MNN.fbs",false,&MNN_text);
flatbuffers::LoadFile("Tensor.fbs",false,&Tensor_text);
flatbuffers::LoadFile("TensorflowOp.fbs",false,&TensorflowOp_text);
flatbuffers::LoadFile("TFQuantizeOp.fbs",false,&TFQuantizeOp_text);
flatbuffers::LoadFile("Type.fbs",false,&Type_text);
flatbuffers::LoadFile("UserDefine.fbs",false,&UserDefine_text);
flatbuffers::Parser parser;
parser.Parse(Type_text.c_str(),nullptr,"Type.fbs")&&
parser.Parse(Tensor_text.c_str(),nullptr,"Tensor.fbs")&&
parser.Parse(UserDefine_text.c_str(),nullptr,"UserDefine.fbs")&&
parser.Parse(CaffeOp_text.c_str(),nullptr,"CaffeOp.fbs")&&
parser.Parse(TensorflowOp_text.c_str(),nullptr,"TensorflowOp.fbs")&&
parser.Parse(GpuLibrary_text.c_str(),nullptr,"GpuLibrary.fbs")&&
parser.Parse(TFQuantizeOp_text.c_str(),nullptr,"TFQuantizeOp.fbs")&&
parser.Parse(MNN_text.c_str(),nullptr,"MNN.fbs")&&
parser.Parse(BasicOptimizer_text.c_str(),nullptr,"BasicOptimizer.fbs");
std::string output_text;
flatbuffers::GenerateText(parser,buffer_pointer,&output_text);
std::ofstream os;
os.open("mobilenet-v1.txt");
os<<output_text;
os.close();
}
