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)。