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| class Data {
public:
int key;
char value;
Data(int key, char value) {
this->key = key;
this->value = value;
}
~Data() {}
};
//ячейка
class Item {
public:
Data *data;
Item *next;
Item(Data *data, Item *next) {
this->data = data;
this->next = (next!=NULL?next:NULL);
}
~Item() {}
};
//список
class List {
public:
Item *head;
int count;
List() {
head = NULL;
count = 0;
}
~List() {
if (head != NULL)
{
Item *current = head;
for (int i = 0; i < count&¤t->next!=NULL; i++)
{
Item *temp=current;
current = current->next;
temp->next = NULL;
delete temp;
}
}
}
Item* look(int key) {
Item *temp;
temp = head;
while (temp != NULL)
{
if (temp->data->key == key)
{
return temp;
}
temp = temp->next;
}
}
void print(Item *head) {
if (head != NULL)
{
std::cout << head->data->value << ", ";
print(head->next);
}
/*for (int i = 0; i < count; i++)
{
std::cout << current->data->value << ", ";
current = current->next;
}*/
std::cout << std::endl;
}
bool add(int i, Data *data) {
Item *temp = new Item(data, NULL);
if (i > count)
{
return false;
}
else
{
if (head == NULL)
{
head = new Item(data, NULL);
count++;
return true;
}
else
{
Item *current = head;
for (int n = 0; n < i && current->next!=NULL; n++)
current = current->next;
if (i == 0)
{
temp->next = head;
head = temp;
count++;
}
else
{
if (current->next != NULL)
{
temp->next = current->next;
current->next = temp;
}
else
{
temp->next = NULL;
current->next = temp;
}
count++;
}
}
return true;
}
}
bool del(int key)
{
if (head == NULL)
{
return false;
}
else
{
Item *temp, *current;
temp = NULL;
current = head;
while (current->next != NULL)
{
current = current->next;
if (current->data->key == key)
{
if (current == head)
{
head = head->next;
delete (current);
current = head;
return true;
}
else
{
temp = head;
while (temp->next != current)
{
temp = temp->next;
}
temp->next = current->next;
delete (current);
current = temp;
return true;
}
}
}
}
}
};
void userTest() {
List myList;
int command = 1, temp=0;
Data *inp=new Data (NULL,NULL);
while (command != 0)
{
std::cout << "input 1, if you want print\n";
std::cout << "input 2, if you want serach\n";
std::cout << "input 3, if you want add\n";
std::cout << "input 4, if you want delete\n";
std::cout << "input 0, if you want finish\n";
std::cin >> command;
switch (command) {
case 1: {
myList.print(myList.head);
break;
}
case 2: {
std::cout << "input the numeric key: ";
std::cin >> temp;
std::cout<<myList.look(temp)->data->value<<"\n";
break;
}
case 3: {
bool flag = false;
while (!flag)
{
std::cout << "Input index <= " << myList.count<<": ";
std::cin >> temp;
if (temp > myList.count)
{
std::cout << "Index error!\n";
}
else
{
flag = true;
}
}
std::cout << "Input KEY: ";
std::cin>>inp->key;
std::cout << "Input VALUE: ";
std::cin >> inp->value;
myList.add(temp, inp);
break;
}
case 4:
{
std::cout << "input the numeric key: ";
std::cin >> temp;
myList.del(temp);
break;
}
}
}
} |
(
