Linked List Need Help Urgent
Need urgent HELP for the coding below. Wonder why all records added cannot be displayed, after entering the record when trying to list them out, the list still appeared to be EMPTY.
Code:
#include<stdio.h>
#include<conio.h>
#include<malloc.h>
struct album
{
int rec;
int AlbumNo;
char AlbumName[50];
char ArtistName[50];
int Year;
int TotalTrack;
char TrackName[50][50], TrackDuration[50][50];
int trackTimeM[60];
int trackTimeS[60];
struct album *next;
};
typedef struct album node;
void AddAlbum();
void AddAlbum2(node *p);
void ListAlbum();
void ListAlbum2(node *p);
void ModifyAlbum();
void ModifyAlbum2(node *p);
void RemoveAlbum();
int Compare(node *p,int);
void main()
{
int exit=1,option=0;
node *head;
head = NULL;
do
{
printf("\n===================================\n");
printf("\nWelcome to the Music Storage System\n");
printf("\n===================================\n\n\n");
printf("1-- Add New Album Record\n");
printf("2-- Display All Album Records\n");
printf("3-- Modify Album Records\n");
printf("4-- Remove Existing Album Records\n");
printf("5-- Exit\n\n");
printf("Please select your option\n\n");
scanf("%d",&option);
switch(option)
{
case 1 :AddAlbum();
case 2 :ListAlbum();
case 3 :ModifyAlbum();
case 4 :RemoveAlbum();
case 5 :
{
exit=0;
break;
}
default :
{
printf("\n\aPlease enter option between 1 - 5.\n");
break;
main();
}
}
}while(exit==1);
getch();
}
void AddAlbum()
{
int artist;
node *head;
head = NULL;
do
{
printf("\nEnter the Type of Album:\n");
printf("1-- Single Artist\n");
printf("2-- Multiple Artists\n\n");
scanf("\n%d",&artist); fflush(stdin);
switch (artist)
{
case 1: {
if(head==NULL)
{
head=(node *)malloc(sizeof (node));
AddAlbum2(head);
head->next=NULL;
}
else
{
node *temp;
temp=head;
while(temp->next!=NULL)
{
temp=temp->next;
}
temp->next=(node *)malloc(sizeof (node));
AddAlbum2(temp->next);
temp->next->next=NULL;
}
break; }
case 2: printf("\n\aThis system only supports albums created for single artists.\n");AddAlbum();
}
}while (artist !=2);
}
void AddAlbum2(node *p)
{
static int rec = 0;
p->AlbumNo = ++ rec;
printf("\n\nEnter album's name : \t");
gets(p->AlbumName);fflush(stdin);
printf("Enter artist's name : \t");
gets(p->ArtistName);fflush(stdin);
printf("Enter album's released year : \t");
scanf("%d",&p->Year);fflush(stdin);
while (p->Year <1900 || p->Year > 2004)
{
printf("Enter album's released year : ");
scanf("%d",&p->Year);fflush(stdin);
}
while ( p->TotalTrack < 1 || p->TotalTrack > 20)
{
printf("Enter total number of tracks in the album : \t");
scanf("%d",&p->TotalTrack);fflush(stdin);
}
for ( int x=0; x<p->TotalTrack; x++ )
{
printf("Enter track title : \t");
gets(p->TrackName[x]);fflush(stdin);
printf("Enter track duration (mm:ss): \t");
gets(p->TrackDuration[x]);fflush(stdin);
}
main();
}
void ListAlbum()
{
int list=0;
node *head,*temp;
head = NULL;
list = 0;
temp=head;
while(temp != NULL)
{
list = 1;
ListAlbum2(temp);
temp=temp->next;
}
if (list == 0)
{printf("\n\aThere is no record existing record.\n");}
main();
}
void ListAlbum2(node *p)
{
int x;
printf("\nRecord Number: \t%d ",p->AlbumNo);
printf("\nAlbum Name: \t%s ",p->AlbumName);
printf("\nArtist Name: \t%s ",p->ArtistName);
printf("\nTotal %d tracks recorded in year %d.",p->TotalTrack, p->Year);
for (x=0;x<p->TotalTrack;x++)
{
printf( "\nTrack %d : %s \t\tDuration: %s\n\n", x+1, &p->TrackName[x], p->TrackDuration[x]);
}
}
void ModifyAlbum()
{
int num,modify=0;
node *head,*temp;
head = NULL;
modify = 0;
temp=head;
printf("\nPlease enter the record number: ");
scanf("%d",&num);fflush(stdin);
while(temp != NULL)
{
if(Compare(temp,num))
{
modify = 1;
ModifyAlbum2(temp);
}
temp=temp->next;
}
if (modify == 0)
{printf("\n\aThere is no record existing record.\n");}
main();
}
void ModifyAlbum2(node *p)
{
int x,add,edit,option;
printf("\n1-- Edit album's name");
printf("\n2-- Edit artist's name");
printf("\n3-- Edit album released year");
printf("\n4-- Add additional track/s to album");
printf("\n\nPlease select your option : ");
scanf("%s",&option);fflush(stdin);
switch (option)
{
case 1 :
{
printf("\nEnter album's name : \t");
gets(p->AlbumName);fflush(stdin);
printf("\nAlbum's name changed.");
break;
}
case 2 :
{
printf("\nEnter artist's name : \t");
gets(p->ArtistName);fflush(stdin);
printf("\nArtist's name changed");
break;
}
case 3 :
{
while (p->Year <1900 || p->Year > 2004)
{
printf("Enter album's released year : \t");
scanf("%d",&p->Year);fflush(stdin);
}
printf("\nAlbum's released year changed.");
break;
}
case 4 :
{
while ( (p->TotalTrack + add) < 18)
{
printf("Enter the total number of ADDITIONAL track/s : \t");
scanf("%d",&add);fflush(stdin);
}
p->TotalTrack = p->TotalTrack + add;
for ( x=1 ; x<=add; x++ )
{
printf("\nEnter track title : \t");
gets(p->TrackName[p->TotalTrack+x]);fflush(stdin);
printf("Enter track duration (mm:ss): \t\n");
gets(p->TrackDuration[p->TotalTrack+x]);fflush(stdin);
}
printf("\nThe addtional tracks is/are successfully added.");
break;
}
default :
{
printf("\n\aPlease enter option between 1 - 5.\n");
break;
}
}
}
void RemoveAlbum()
{
int num,remove=0;
node *head,*temp,*current,*previous;
head = NULL;
remove = 0;
temp=head;
printf("\nPlease enter the record number : ");
scanf("%d",&num);fflush(stdin);
if(Compare(head,num))
{
remove=1;
temp=head;
head=head->next;
free(temp);
}
else
{
previous=head;
current = head->next;
while (current !=NULL && current->AlbumNo != num)
{
previous = current;
current = current->next;
}
if (current != NULL)
{
remove=1;
temp = current;
previous->next = current->next;
free(temp);
}
}
if (remove == 0)
{printf("\n\aThere is no existing record.");}
else
{printf("\n\aRecord removed.");}
main();
}
int Compare(node *p,int got)
{
if(p->AlbumNo==got)
{return 1;}
else
{return 0;}
}
