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192 lines (181 loc) · 8.25 KB
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#include <iostream>
#include <iomanip>
#include "dbmsLib.h"
using namespace std;
int menu()
{
cout << "================= МАКЕТ СУБД ===================\n";
cout << "\t1 - Чтение таблицы из файла\n";
cout << "\t2 - Печать таблицы\n";
cout << "\t3 - Запись таблицы в файл\n";
cout << "\t4 - Выдать книгу студенту\n";
cout << "\t5 - Выход\n";
int choice;
cout << "Выберите действие\n";
cin >> choice;
while (cin.fail())
{
cout << "Ошибка ввода. Повторите ввод\n";
cin.clear();
cin.ignore(10, '\n');
cin >> choice;
}
return choice;
}
//=================================================
int main()
{
system("chcp 1251>nul");
int StudentID = 0;
int BookID = 0;
int SubjectID = 0;
char buff[20];
char buff_subjectID[20];
char buff_bookID[20];
void *adress;
dbmsLib::Row row;
string name;
string group;
string tmp_date;
dbmsLib::DBTableTxt stud("Students.txt");
dbmsLib::DBTableTxt book("Books.txt");
dbmsLib::DBTableTxt abonements("Abonements.txt");
while (true)
{
row.clear();
switch (menu())
{
case 1:
stud.ReadDBTable("Students.txt");
cout << "Файл с информацией о студентах успешно прочитан" << endl;
book.ReadDBTable("Books.txt");
cout << "Файл с информацией о книгах успешно прочитан" << endl;
abonements.ReadDBTable("Abonements.txt");
cout << "Файл с информацией об абонементах успешно прочитан" << endl;
case 2:
stud.PrintTable(80);
book.PrintTable(80);
abonements.PrintTable(80);
break;
case 3:
stud.WriteDBTable("Students.txt");
book.WriteDBTable("Books.txt");
abonements.WriteDBTable("Abonements.txt");
cout << "Информация записана в файлы" << endl;
break;
case 4:
{
bool flag = false;
cout << "Введите ID студента" << endl;
cin >> StudentID;
_itoa_s(StudentID, buff, 20, 10);
for (size_t i = 0; i < stud.GetSize(); ++i)
{
if (dbmsLib::comparator(dbmsLib::Int32, (stud.GetRow(i)).find("StudentID")->second, dbmsLib::Equal,
dbmsLib::GetValue((char *)buff, (string) "StudentID", stud.GetHeader())))
{
}
}
if (flag)
{
flag = false;
cout << "Введите дату выдачи книги(дд.мм.гггг)" << endl;
cin >> tmp_date;
cout << "Введите ID книги" << endl;
cin >> BookID;
int quantity = 0;
int number = 0;
string tmp_num;
string bookIdTemp;
_itoa_s(BookID, buff_bookID, 20, 10);
for (size_t i = 0; i < book.GetSize(); i++)
{
flag = true;
if (dbmsLib::comparator(dbmsLib::Int32, (book.GetRow(i)).find("BookID")->second, dbmsLib::Equal,
dbmsLib::GetValue((char *)buff_bookID, (string) "BookID", book.GetHeader())))
{
tmp_num = book.valueToString(book.GetRow(i), "SubjectID");
SubjectID = atoi(tmp_num.c_str());
for (size_t j = 0; j < abonements.GetSize(); j++)
{
if (dbmsLib::comparator(dbmsLib::Int32, (abonements.GetRow(j)).find("StudentID")->second, dbmsLib::Equal,
dbmsLib::GetValue((char *)buff, (string) "StudentID", abonements.GetHeader())))
{
bookIdTemp = abonements.valueToString(abonements.GetRow(j), "BookID");
for (size_t k = 0; k < book.GetSize(); k++)
{
if (dbmsLib::comparator(dbmsLib::Int32, (book.GetRow(k)).find("BookID")->second, dbmsLib::Equal,
dbmsLib::GetValue((char *)bookIdTemp.c_str(), (string) "BookID", book.GetHeader())))
{
if (SubjectID == atoi(book.valueToString(book.GetRow(k), "SubjectID").c_str()))
{
if (dbmsLib::comparator(dbmsLib::Date, (abonements.GetRow(j)).find("InDate")->second, dbmsLib::Greater,
dbmsLib::GetValue((char *)tmp_date.c_str(), (string) "InDate", abonements.GetHeader())))
{
flag = false;
break;
}
}
}
}
}
if (!flag)
{
break;
}
}
if (flag)
{
tmp_num = book.valueToString(book.GetRow(i), "Quantity");
quantity = atoi(tmp_num.c_str());
tmp_num = book.valueToString(book.GetRow(i), "Number");
number = atoi(tmp_num.c_str());
tmp_num = book.valueToString(book.GetRow(i), "BookID");
BookID = atoi(tmp_num.c_str());
if (quantity > number)
{
++number;
_itoa_s(number, buff, 20, 10);
(book.GetRow(i)).find("Number")->second = dbmsLib::GetValue((char *)buff,
(string) "Number", book.GetHeader());
_itoa_s(StudentID, buff, 20, 10);
adress = dbmsLib::GetValue((char *)buff, (string) "StudentID", abonements.GetHeader());
row[(string) "StudentID"] = adress;
_itoa_s(BookID, buff, 20, 10);
adress = dbmsLib::GetValue((char *)buff, (string) "BookID", abonements.GetHeader());
row[(string) "BookID"] = adress;
adress = dbmsLib::GetValue((char *)tmp_date.c_str(), (string) "OutDate", abonements.GetHeader());
row[(string) "OutDate"] = adress;
dbmsLib::DBDate indate(tmp_date);
indate += 14;
adress = dbmsLib::GetValue((char *)(DateToStr(indate)).c_str(), (string) "InDate", abonements.GetHeader());
row[(string) "InDate"] = adress;
abonements.AddRow(row, abonements.GetSize());
}
else
{
cout << "Данной книги сейчас нет" << endl;
}
}
break;
}
}
if (!flag)
{
cout << "У студента уже есть книга по этому предмету" << endl;
}
}
else
{
cout << "Такого студента нет" << endl;
}
}
break;
case 5:
return 0;
default:
break;
}
}
return 0;
}