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| #include <iostream>
#include <string>
#include "Windows.h"
using namespace std;
struct Students {
int number;
string student;
double math;
double physic;
double IT;
double score;
};
struct secondlist {
Students p;
secondlist* next;
secondlist* prev;
};
secondlist* head;
void AddList(int position, int number, string student, int math, int physic,int IT, double score)
{
secondlist* node = new secondlist;
node->p.number = number;
node->p.student = student;
node->p.math = math;
node->p.physic = physic;
node->p.IT = IT;
node->p.score = score;
if (head == NULL)
{
node->next = node;
node->prev = node;
head = node;
}
else
{
secondlist* p = head;
for (int i = position; i > 1; i--) p = p->next;
p->prev->next = node;
node->prev = p->prev;
node->next = p;
p->prev = node;
}
cout << "\nЭлемент добавлен!\n";
}
void calcEL()
{
int calc_e = 0;
if (head == NULL) cout << "\nСписок пустой!\n";
else
{
secondlist* a = head;
do
{
a = a->next;
calc_e++;
} while (a != head); cout << endl;
cout << "Элементов в списке: " << calc_e << endl;
}
}
void print2(int n)
{
secondlist* print = head->next;
cout << "==================================" << endl;
cout << "| №№ | СТУДЕНТ |МT|ФЗ|IT|РЕЙТИНГ|" << endl;
cout << "|====|==========|==|==|==|=======|" << endl;
for (int i = 0; i < n; i++) {
cout << "|" << print->p.number << "|" << "\t";
cout << print->p.student << "\t";
cout << "|" << print->p.math << "|";
cout << print->p.physic;
cout << "|" << print->p.IT;
cout << "|" << print->p.score << "|" << endl;
print = print->next;
}
cout << "==================================" << endl;
cout << "|\t№№ - номер зачетной |\n|\tMT - математика |\n|\tФЗ - физика |\n|\tІТ - информатика |" << endl;
cout << "==================================" << endl;
}
void DeleteList(int position)
{
if (head == NULL) { cout << "\nСписок пустой!\n"; }
if (head == head->next)
{
delete head;
head = NULL;
}
else
{
secondlist* a = head;
for (int i = position; i > 1; i--) a = a->next;
if (a == head) head = a->next;
a->prev->next = a->next;
a->next->prev = a->prev;
delete a;
}
cout << "\nЭлемент удален!\n";
}
int main()
{
int value, n,position = 1, calc = 0, x;
int number, math, physic, IT;
double score;
string student;
SetConsoleCP(1251);
SetConsoleOutputCP(1251);
cout << "Начальное кол-во элементов: ";
cin >> n;
for (int i = 0; i < n && i < position; i++) {
position++;
cout << "№ зачетной: "; cin >> number; cout << "Фамилия "; cin >> student; cout << "Математика: "; cin >> math; cout << "Физика: "; cin >> physic; cout << "IT: "; cin >> IT;
score = (math + physic + IT) / 3.0;
AddList(position, number, student, math, physic, IT, score);
}
print2(n);
do
{
cout << "1. Добавить элемент" << endl;
cout << "2. Удаление элемента" << endl;
cout << "3. Просмотр списка" << endl;
cout << "4. Подсчитать кол-во элементов в списке" << endl;
cout << "0. Выйти" << endl;
cout << "\nНомер операции: "; cin >> x;
switch (x)
{
case 1:
cout << "№ зачетной: "; cin >> number; cout << "Фамилия "; cin >> student; cout << "Математика: "; cin >> math; cout << "Физика: "; cin >> physic; cout << "IT: "; cin >> IT;
score = (math + physic + IT) / 3.0;
n++;
AddList(position, number, student, math, physic, IT, score);
print2(n);
break;
case 2:
cout << "Удаление с позиции №: "; cin >> position;
DeleteList(position); n--; print2(n); break;
case 3: print2(n);; break;
case 4: calcEL(); break;
}
} while (x != 0);
} |
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