#include <iostream.h>
#include <conio.h>
#include <stdio.h>
#include <list>
struct Item
{
char itsName[10];
int itsPrice;
int itsCount;
Item* itsNext;
Item* itsPrev;
};
struct List
{
Item* itsFirst;
Item* itsLast;
};
void menu();
void AddItem(List&);
void DeleteItem(List&);
void PrintList(List&);
void CreateList (List*&);
List* theList = 0;
int main()
{
List* itsFirst=0;
List* itsLast=0;
menu();
getche();
return 0;
}
void menu()
{
bool quit = false;
while (true)
{
int choice;
printf(" ******* MENU *********** \n\n\n" );
printf("(1) vvedite spisok \n" );
printf( "(2) prosmotr \n");
printf("(3) dobavlenie \n");
printf("(4) udalenie \n");
printf("(5) vyhod \n" );
scanf(" ",choice);
switch (choice)
{
case(1):
if (!theList)
{
CreateList (theList);
theList->itsFirst = 0;
theList->itsLast = 0;
printf("the List has been created succesfully...");
}
else
printf("the List is already created..." );
break;
case(2):
if (theList)
PrintList(*theList);
else
printf("the List is not created...");
break;
case(3):
if (theList)
AddItem(*theList);
else
printf("the List is not created...");
break;
case 4:
if (theList)
DeleteItem(*theList);
else
printf("the List is not created...");
break;
case(5):
quit = true;
}
if (quit == true)
break;
}
}
void AddItem(List& theList)
{
printf("*** dobavit' novuy tovar ***");
printf("vvedite nazvanie: ");
Item* newItem = new Item;
gets(newItem->itsName);
printf("vvedite cenu: ");
scanf(" ",newItem->itsPrice);
printf("vvedite kolichestvo: ");
scanf(" ",newItem->itsCount);
if (theList.itsLast)
{
theList.itsLast->itsNext = newItem;
newItem->itsPrev = theList.itsLast;
}
else
{
theList.itsFirst = newItem;
newItem->itsPrev = 0;
}
theList.itsLast = newItem;
newItem->itsNext = 0;
printf("*** item was added successfully ***");
}
void CreateList ( List*& pList)
{
pList = new List;
printf( "*** vvedite tovar ***");
printf("vvedite nazvanie: ");
Item* newItem = new Item;
scanf(" ", newItem->itsName);
printf( "vvedite cenu: " );
printf(" ", newItem->itsPrice);
printf("vvedite kolichestvo: ");
scanf( " ",newItem->itsCount);
}
void PrintList(List& theList)
{
printf("*** list content ***");
Item* curItem = theList.itsFirst;
while (curItem)
{
printf(curItem->itsName , " " ,curItem->itsPrice , "$ " ,curItem->itsCount ," ones." );
curItem = curItem->itsNext;
}
printf("*** end ***" );
}
void DeleteItem(List& theList)
{
Item* curItem = theList.itsFirst;
int Pos;
printf("Enter the position of deleted item: ");
scanf(" ",Pos);
printf(" ",Pos);
for (int i=0; i<Pos ; i++)
{
if (curItem)
curItem = curItem->itsNext;
}
if (curItem && (Pos >= 0))
{
if (curItem->itsPrev)
{
curItem->itsPrev->itsNext = curItem->itsNext;
}
else
{
theList.itsFirst = curItem->itsNext;
}
if (curItem->itsNext)
{
curItem->itsNext->itsPrev = curItem->itsPrev;
}
else
{
theList.itsLast = curItem->itsPrev;
}
delete curItem;
printf("Item № ", Pos ," has been deleted successfully..." );
}
else
printf("Item № ", Pos , " not found..." );
} |