Link List Problem,
- by david
OK i have a problem with a Link List program i'm trying to Do,
the link List is working fine.
Here is my code
#include <iostream>
using namespace std;
struct record
{
string word;
struct record * link;
};
typedef struct record node;
node * insert_Node( node * head, node * previous, string key );
node * search( node *head, string key, int *found);
void displayList(node *head);
node * delete_node( node *head, node * previous, string key);
int main()
{
node * previous, * head = NULL;
int found = 0;
string node1Data,newNodeData, nextData,lastData;
//set up first node
cout <<"Depature"<<endl;
cin >>node1Data;
previous = search( head, node1Data, &found);
cout <<"Previous" <<previous<<endl;
head = insert_Node(head, previous, node1Data);
cout <<"Depature inserted"<<endl;
//insert node between first node and head
cout <<"Destination"<<endl;
cin >>newNodeData;
previous = search( head, newNodeData, &found);
cout <<"Previous" <<previous<<endl;
head = insert_Node(head, previous, newNodeData);
cout <<"Destinationinserted"<<endl;
//insert node between second node and head
cout <<"Cost"<<endl;
cin >>newNodeData;
previous = search( head, newNodeData, &found);
cout <<"Previous" <<previous<<endl;
head = insert_Node(head, previous, newNodeData);
cout <<"Cost inserted"<<endl;
cout <<"Number of Seats Required"<<endl;
//place node between new node and first node
cin >>nextData;
previous = search( head, nextData, &found);
cout <<"Previous" <<previous<<endl;
head = insert_Node(head, previous, nextData);
cout <<"Number of Seats Required inserted"<<endl;
//insert node between first node and head
cout <<"Name"<<endl;
cin >>newNodeData;
previous = search( head, newNodeData, &found);
cout <<"Previous" <<previous<<endl;
head = insert_Node(head, previous, newNodeData);
cout <<"Name inserted"<<endl;
//insert node between node and head
cout <<"Address "<<endl;
cin >>newNodeData;
previous = search( head, newNodeData, &found);
cout <<"Previous" <<previous<<endl;
head = insert_Node(head, previous, newNodeData);
cout <<"Address inserted"<<endl;
//place node as very last node
cin >>lastData;
previous = search( head, lastData, &found);
cout <<"Previous" <<previous<<endl;
head = insert_Node(head, previous, lastData);
cout <<"C"<<endl;
displayList(head);
char Ans = 'y';
//Delete nodes
do
{
cout <<"Enter Keyword to be delete"<<endl;
cin >>nextData;
previous = search( head, nextData, &found);
if (found == 1)
head = delete_node( head, previous,nextData);
displayList(head);
cout <<"Do you want to Delete more y /n "<<endl;
cin >> Ans;
}
while( Ans =='y');
int choice, i=0, counter=0;
int fclass[10];
int coach[10];
printf("Welcome to the booking program");
printf("\n-----------------");
do{
printf("\n Please pick one of the following option:");
printf("\n 1) Reserve a first class seat on Flight 101.");
printf("\n 2) Reserve a coach seat on Flight 101.");
printf("\n 3) Quit ");
printf("\n ---------------------------------------------------------------------");
printf("\nYour choice?");
scanf("%d",&choice);
switch(choice)
{
case 1:
i++;
if (i <10){
printf("Here is your seat: %d " , fclass[i]);
}
else if (i = 10)
{
printf("Sorry there is no more seats on First Class. Please wait for the next flight");
}
break;
case 2:
if (i <10){
printf("Here is your Seat Coach: %d " , coach[i]);
}
else if ( i = 10)
{
printf("Sorry their is no more Seats on Coach. Please wait for the next flight");
}
break;
case 3:
printf("Thank you and goodbye\n");
//exit(0);
}
} while (choice != 3);
}
/*******************************************************
search function to return previous position of node
******************************************************/
node * search( node *head, string key, int *found)
{
node * previous, * current;
current = head; previous = current;
*found = 0;//not found
//if (current->word < key) move through links until the next link
//matches or current_word > key
while( current !=NULL)
{
//compare exactly
if (key ==current->word )
{
*found = 1;
break;
}
//if key is less than word
else if ( key < current->word )
break;
else
{
//previous stays one link behind current
previous = current;
current = previous -> link;
}
}
return previous;
}
/********************************************************
display function as used with createList
******************************************************/
void displayList(node *head)
{
node * current;
//current now contains the address held of the 1st node similar //to head
current = head;
cout << "\n\n";
if( current ==NULL)
cout << "Empty List\n\n";
else
{
/*Keep going displaying the contents of the list and
set current to the address of the next node.
When set to null, there are no more nodes
*/
while(current !=NULL)
{
cout << current->word<<endl;
current = current ->link;
}
}
}
/************************************************************
insert node used to position node
(i) empty list head = NULL
(ii) to position node before the first node key < head->word
(iii) every other position including the end of the list
This is done using the following steps
(a) Pass in all the details to create the node either details or a whole record
(b) Pass the details over to fill the node
(C) Use the if statement to add the node to the list
**********************************************************/
node * insert_Node( node * head, node * previous, string key )
{
node * new_node, * temp;
new_node = new node; //create the node
new_node ->word = key;
new_node -> link = NULL;
if (head == NULL || key < head->word ) //empty list
{
//give address of head to temp
temp = head;
//head now points to the new_node
head = new_node;
//new_node now points to what head was pointing at
new_node -> link = temp;
}
else
{
//pass address held in link to temp
temp = previous-> link;
//put address of new node to link of previous
previous -> link = new_node;
//pass address of temp to link of new node
new_node -> link = temp;
}
return head;
}
node * delete_node( node *head, node * previous, string key)
{
/* this function will delete a node but will not return its
contents */
node * temp;
if(key == head->word) //delete node at head of list
{
temp = head;
//point head at the next node
head = head -> link;
}
else
{
//holds the address of the node after the one
// to be deleted
temp = previous-> link;
/*assign the previous to the address of the
present node to be deleted which holds
the address of the next node */
previous-> link = previous-> link-> link;
}
delete temp;
return head;
}//end delete
The problem i have is when i Enter in the Number 2 in the Node(Seats) i like to get a Counter Taken 2 off of 50, some thing like what i have here
enter code here
int choice, i=0, counter=0;
int fclass[10];
int coach[10];
printf("Welcome to the booking program");
printf("\n-----------------");
do{
printf("\n Please pick one of the following option:");
printf("\n 1) Reserve a first class seat on Flight 101.");
printf("\n 2) Reserve a coach seat on Flight 101.");
printf("\n 3) Quit ");
printf("\n ---------------------------------------------------------------------");
printf("\nYour choice?");
scanf("%d",&choice);
switch(choice)
{
case 1:
i++;
if (i <10){
printf("Here is your seat: %d " , fclass[i]);
}
else if (i = 10)
{
printf("Sorry there is no more seats on First Class. Please wait for the next flight");
}
break;
case 2:
if (i <10){
printf("Here is your Seat Coach: %d " , coach[i]);
}
else if ( i = 10)
{
printf("Sorry their is no more Seats on Coach. Please wait for the next flight");
}
break;
case 3:
printf("Thank you and goodbye\n");
//exit(0);
}
} while (choice != 3);
How can i get what the User enters into number of Seats into this function
