/* Author : Paul Caron, alias ChillPill on sololearn About : This program reads and writes entries to a text file. todo : edit the entries. improve search. add some multithread power maybe. taking arguments from command line. */ #include #include #include #include #include #include #define bar "==============================\n" #define file_name "database.txt" using namespace std; struct Schema{ vector column_names; vector column_max_chars; Schema(vector s, vector mc){ if(s.size()==mc.size()){ column_names = s; column_max_chars = mc; }else{ cout<<"invalid schema"; exit(1); } } }; enum Command{ search, edit, erase, add }; class DBmanager{ private: fstream fs; vector column_names; vector column_max_chars; int table_size; public: DBmanager(Schema schema){ for(auto n:schema.column_names) column_names.push_back(n); for(auto m:schema.column_max_chars) column_max_chars.push_back(m); table_size= column_names.size(); } ~DBmanager(){ fs.close(); } void init(){ fs.open(file_name,ios::app|ios::in|ios::out); if(fs.is_open()) cout<<"Success\n"; else cout<<"Failed\n"; } void append(string s){ fs.clear(); fs.seekp(0,ios::end); fs << s < params; params=parseArgs(args); int col_index; bool index_found=false; for(col_index=0;col_index v; while(getline(fs,line)){ v=parseArgs(line); if(v.at(col_index)==params.at(1)) cout< data; data = parseArgs(args); string entry; for(int i=0;i params; params=parseArgs(args); vector labels; vector values; for(int i=0;i lab_indexes; int col_index; int index_found=0; for(int i=0;i v; vector lines; while(getline(fs,line)){ v=parseArgs(line); int found=0; for(int i=0;i parseArgs(string args){ vector params; istringstream iss(args); istream_iterator eos;//end of stream istream_iterator it(iss);//iss iterator while(it!=eos)params.push_back(*it++); return params; } }; //argc and args to be used when running program with arguments on command line, on your own computer int main(int argc, char ** args) { vector cols={"firstname","lastname","birthday"}; vector maxchar={15,15,15}; Schema schema(cols,maxchar); DBmanager db(schema); cout<<"Connecting..."<

Database