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C dataset 轉(zhuǎn)換 json

C dataset 轉(zhuǎn)換 json 可以說是一種將數(shù)據(jù)從一種形式轉(zhuǎn)換為另一種形式的過程。C dataset是一種分層數(shù)據(jù)結(jié)構(gòu),其中每個(gè)層都包含一個(gè)表格,表格由列和行組成。這種結(jié)構(gòu)通常在C++中使用。Json是一種適用于各種編程語言的輕量級(jí)數(shù)據(jù)交換格式,它易于閱讀和編寫,并且易于解析和生成。有許多庫和API可以幫助將C dataset轉(zhuǎn)換為json。

//C++源代碼
#include <iostream>
#include <string>
#include <sstream>
#include <map>
#include <vector>
using namespace std;
string convertToString(double value)
{
ostringstream out;
out << value;
return out.str();
}
vector<map<string, string>> convertDataToVector(CDataSet data)
{
vector<map<string, string>> dataVector;
for (int i = 0; i < data.TableCount(); i++)
{
CTable *table = data.Table(i);
map<string, string> tableMap;
for (int j = 0; j < table->ColCount(); j++)
{
CColumn *column = table->Col(j);
for (int k = 0; k < column->RowCount(); k++)
{
string columnName = column->Name();
string rowName = column->RowName(k);
double value = column->Data(k);
string newValue = convertToString(value);
tableMap[columnName + ":" + rowName] = newValue;
}
}
dataVector.push_back(tableMap);
}
return dataVector;
}
void writeVectorToJson(ostream &out, const vector<map<string, string>> &data)
{
out << "[";
for (int i = 0; i < data.size(); i++)
{
if (i > 0) out << ", ";
out << "{";
for (auto it = data.at(i).cbegin(); it != data.at(i).cend(); ++it)
{
if (it != data.at(i).cbegin()) out << ", ";
out << "\"" << it->first << "\"" << ": " << it->second;
}
out << "}";
}
out << "]";
}
int main()
{
CDataSet data;
data.ReadFromFile("data.bin");
vector<map<string, string>> dataVector = convertDataToVector(data);
ostringstream out;
writeVectorToJson(out, dataVector);
cout << out.str() << endl;
return 0;
}

本文介紹了將C dataset轉(zhuǎn)換為json的基礎(chǔ)過程。我們首先將數(shù)據(jù)轉(zhuǎn)換為vector<map<string, string>>,其中vector包含一些map對(duì)象,每個(gè)map對(duì)象代表一個(gè)表,而由string鍵和string值組成的鍵值對(duì)則代表列名和行名。然后我們寫一個(gè)函數(shù)來將數(shù)據(jù)向json格式轉(zhuǎn)換,最后我們將輸出json數(shù)據(jù)。