C Programming PLZ give me a new answer thank you. Many of us have large digital

Question

C Programming PLZ give me a new answer thank you.

Many of us have large digital music collections that are not always very well organized. It would be nice to have a program that would manipulate our music collection based on attributes such as artist, album title, song title, genre, song length, number times played, and rating. For this assignment you will write a basic digital music manager (DMM) Your DMM program must have a text-based interface which allows the user to select from a main menu of options including: (1) load, (2) store, (3) display, (4) insert, (5) delete, (6) edit, (7) sort, (8) rate, (9) play, (10) shuffle, and 11) exit. For Part I of the assignment, you will only need to complete the main menu, 1) load, (2) store, (3) display, (6) edit, (8) rate, (9) play, and (11) exit features. The other features will be completed in the next part of the assignment What must the main menu contain? The main menu must display the following commands: (1) load (2) store (3) display (4) insert (5) delete (6) edit (7) sort (8) rate (9) play (10) shuffle (11) exit After a command is selected and completed, your program must display the main menu again. This procedure will continue until the "exit" command is selected what must “load" do? The "load" command must read all records from a file called musicPlayList.csv (you may find a sample file here) into a dynamic doubly linked list. The doubly linked list is considered the main playlist. As each record is read from the file, it must be inserted at the front of the list. Each record consists of the following attributes Artist a string Album title - a string Song title- a string Genre - a string Song length-a struct Duration type consisting of seconds and minutes, both integers

Explanation / Answer

//Copyable Code:

main.c

#include <stdio.h>
#include "list.h"
#include <ctype.h>
#include <stdlib.h>
#include <conio.h>
int main()
{
int choice;
FILE *fp;
char filename[256];
int num,rating;
node *list=NULL,*rec,*start;
char artist[MAX_LEN],album[MAX_LEN],song[MAX_LEN],genre[MAX_LEN];
duration d;
char ans;

do
{
//display menu and get user's choice
printf(" 1.Load 2.Store 3.Display 4.Insert 5.Delete");
printf(" 6.Edit 7.Sort 8.Rate 9.Play 10.Shuffle 11.Exit");
printf(" Enter your choice: ");
scanf("%d",&choice);

//depending on choice ask user for required inputs and call the functions
switch(choice)
{
case 1: /*load - get file name, load and close*/
printf(" Enter name of file to load: ");
getchar();
gets(filename);
fp=fopen(filename,"r");
list=load(fp);
fclose(fp);
break;
case 2:/*store - get file name , store and close*/
printf(" Enter name of file to store: ");
getchar();
gets(filename);
fp=fopen(filename,"w");
store(fp,list);
fclose(fp);
break;
case 3:/*display*/
printf(" The list of songs is ");
display(list);
break;
case 6:/*edit*/

printf(" Enter the artist name : ");
getchar();gets(artist);
start=list;
do
{
rec=find(artist,start); //find matching record from after the point where previous search ended
if(rec!=NULL)
{
displayRecord(rec); //show the record to user if it is the one
printf(" Is this the record you want to edit ? (y/n): ");
scanf("%c",&ans);
if(toupper(ans)=='Y') //if this is the record to be modified , get all new values
{
printf(" Enter new values for the record: ");
printf(" Artist: ");
getchar();gets(artist);
printf(" Album: ");
gets(album);
printf(" Song title: ");
gets(song);

printf(" Genre: ");
gets(genre);
printf(" Duration (min:sec) :");
scanf("%d:%d",&d.minutes,&d.seconds);
printf(" Rating: ");
scanf("%d",&rating);
edit(rec,artist,album,song,genre,d,rating);
printf(" Record edited successfully.");
break;
}
else
start=start->next;
}
}while(rec!=NULL);

if(rec==NULL)
{
printf(" No more records for the artist %s",artist);
}
break;
case 8:/*rate- display all records and ask which record user wants to rate*/
display(list);
printf(" Which record number do you want to rate ? ");
scanf("%d",&num);
printf(" Enter rating (1-5): ");
scanf("%d",&rating);
rate(num,rating,list);
break;
case 9:/*play - display list and ask the song number to start playing*/
display(list);
printf(" Enter the song number you want to start playing : ");
scanf("%d",&num);
play(num,list);
break;
case 11:/*exit*/
exit(0);
default:
;

}
}while(choice!=11);
}

list.h

#define MAX_LEN 100 /*the maximum size of all string data*/
#include <stdio.h>
/*represents the duration of song */
typedef struct time_details
{
int seconds;
int minutes;
}duration;

/*each node in the doubly linked list*/
typedef struct list_node
{
char *artist;
char *album;
char *song;
char *genre;
duration length; // the song length
int times; //times played
int rating; //rating 1-5

struct list_node *next;
struct list_node *prev;
}node;

//add a node to front of head
node *add_node(node *head,node *p);
node * create_node(char *artist,char *album,char *song,char *genre,duration d,int times,int rating);

void store(FILE *fp,node *head);
node *load(FILE *fp);

void display(node *head);
void displayRecord(node *rec);

void rate(int recordNo,int rating,node *head);
void edit(node *rec,char *artist,char *album,char *song,char *genre,duration d,int rating);
void play(int recordNo,node *head);

/*helper functions*/
node* find(char *artist,node *start);
char * copyspecial(char *s1,char *s2);

list.c

#include "list.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

/*add a node to front of head and returns the new head*/
node *add_node(node *head,node *p)
{
if(head==NULL)
return p;
else
{
p->next=head;
head->prev=p;
return p;
}
}

/*create a node with specified value*/
node * create_node(char *artist,char *album,char *song,char *genre,duration d,int times,int rating)
{
node *p = (node *)malloc(sizeof(node));

p->artist=(char *)malloc(strlen(artist)+1); //allocate how much ever is needed for the string
strcpy(p->artist,artist);

p->album=(char *)malloc(strlen(album)+1);
strcpy(p->album,album);

p->song=(char *)malloc(strlen(song)+1);
strcpy(p->song,song);

p->genre=(char *)malloc(strlen(genre)+1);
strcpy(p->genre,genre);

p->length.minutes=d.minutes;
p->length.seconds=d.seconds;

p->times=times;
p->rating=rating;

p->next=p->prev=NULL;
return p;
}

/* stores each record in the following format
* artist,album,songtitle,genre,m:s,times,rating
*/
void store(FILE *fp,node *head)
{
node *p=head;
while(p!=NULL)
{
fprintf(fp,"%s,%s,%s,%s,%d:%d,%d,%d ",p->artist,p->album,p->song,p->genre,p->length.minutes,p->length.seconds,p->times,p->rating);
p=p->next;
}
}

/*
* reads from file assuming each record format is
* artist,album,songtitle,genre,m:s,times,rating
*/
node *load(FILE *fp)
{
node *head=NULL,*p;
char artist[MAX_LEN],album[MAX_LEN],song[MAX_LEN],genre[MAX_LEN];
duration d;
int times,rating;
if(fp==NULL)
return NULL;
printf(" Loading file...");

while(!feof(fp))
{
fscanf(fp,"%[^,],%[^,],%[^,],%[^,],%d:%d,%d,%d ",artist,album,song,genre,&d.minutes,&d.seconds,&times,&rating);
p=create_node(artist,album,song,genre,d,times,rating);
head=add_node(head,p);
}
printf(" Finished loading");
return head;
}

/*displays all the records starting from head to end of list*/
void display(node *head)
{
node *p=head;
int i=1;
while(p!=NULL)
{
printf(" Record %d",i);
displayRecord(p);
p=p->next;
i++;
}
}

/*displays the values in a single record rec*/
void displayRecord(node *rec)
{
printf(" Artist: %s",rec->artist);
printf(" Album: %s",rec->album);
printf(" Song: %s",rec->song);
printf(" Genre: %s",rec->genre);
printf(" Length: %d:%d",rec->length.minutes,rec->length.seconds);
printf(" Times: %d",rec->times);
printf(" Rating: %d ",rec->rating);

}
/*modifies the rating for the record number specified . if recordno is out of range , no records are modified but a message is shown*/
void rate(int recordNo,int rating,node *head)
{
int i=1;
node *p=head;
while(p!=NULL && i<recordNo)
{
p=p->next;
i++;
}
if(i!=recordNo) // not valid record number
{
printf(" Record number out of range");
}
else
{
p->rating=rating;
}
}

/*starts displaying message "playinga ..." from song number specified in recordno till end of list. If recordno is out range, error message is shown*/
void play(int recordNo,node *head)
{
int i=1;
node *p=head;
while(p!=NULL && i<recordNo)
{
p=p->next;
i++;
}
if(i!=recordNo) // not valid record number
{
printf(" Record number out of range");
}
else
{
do
{

printf(" Now playing %s ",p->song);
for(i=0;i<3000;i++) //just to pause for sometime
; //do nothing

p->times=p->times+1; //increase the number of times the record was played.
p=p->next;
}while(p!=NULL);
}
}

/*finds a matching record with given artist name ,beginning teh search at specified start node. If none is found NULL is returned*/
node* find(char *artist,node *start)
{
node *p=start;

while(p!=NULL)
{
if(strcmpi(p->artist,artist)==0) //do case insensitve name comparsion
{
break;
}
else
{
p=p->next;
}
}
return p;
}

/*this function is used to allocate memory for strings. In the records when an edit happens and we need to set new name, if space is not enough for new name
* allocate bigger size memory and free the old memory. Returns the memory location to be used - old one if no new memory was created. Otherwise new memory location
* is returned. The new value from s2 is copied.
*/
char * copyspecial(char *s1,char *s2)
{
if(strlen(s1)<strlen(s1))
{
free(s1);
s1=(char *)malloc(strlen(s2)+1);

}
strcpy(s1,s2);
return s1;

}

/*edits the values in the rec to specified values*/
void edit(node *rec,char *artist,char *album,char *song,char *genre,duration d,int rating)
{
rec->artist=copyspecial(rec->artist,artist);
rec->album=copyspecial(rec->album,album);
rec->song=copyspecial(rec->song,song);
rec->genre=copyspecial(rec->genre,genre);
rec->length.minutes=d.minutes;
rec->length.seconds=d.seconds;
rec->rating=rating;
}

sample input music.csv

Michael Jackson,Thriller,Thriller,Pop,3:40,2,5
Jennifer Lopez,albu1,song1,Hip Hop,2:50,1,4

//Sample output

1.Load
2.Store
3.Display
4.Insert
5.Delete
6.Edit
7.Sort
8.Rate
9.Play
10.Shuffle
11.Exit
Enter your choice: 1

Enter name of file to load: c:/test/music.csv

Loading file...
Finished loading
1.Load
2.Store
3.Display
4.Insert
5.Delete
6.Edit
7.Sort
8.Rate
9.Play
10.Shuffle
11.Exit
Enter your choice: 3

The list of songs is

Record 1
Artist: Jennifer Lopez
Album: albu1
Song: song1
Genre: Hip Hop
Length: 2:50
Times: 1
Rating: 4

Record 2
Artist: Michael Jackson
Album: Thriller
Song: Thriller
Genre: Pop
Length: 3:40
Times: 2
Rating: 5

1.Load
2.Store
3.Display
4.Insert
5.Delete
6.Edit
7.Sort
8.Rate
9.Play
10.Shuffle
11.Exit
Enter your choice: 9

Record 1
Artist: Jennifer Lopez
Album: albu1
Song: song1
Genre: Hip Hop
Length: 2:50
Times: 1
Rating: 4

Record 2
Artist: Michael Jackson
Album: Thriller
Song: Thriller
Genre: Pop
Length: 3:40
Times: 2
Rating: 5

Enter the song number you want to start playing : 1

Now playing song1
Now playing Thriller
1.Load
2.Store
3.Display
4.Insert
5.Delete
6.Edit
7.Sort
8.Rate
9.Play
10.Shuffle
11.Exit
Enter your choice: 6

Enter the artist name : Jenni

No more records for the artist Jenni
1.Load
2.Store
3.Display
4.Insert
5.Delete
6.Edit
7.Sort
8.Rate
9.Play
10.Shuffle
11.Exit
Enter your choice: 3

The list of songs is

Record 1
Artist: Jennifer Lopez
Album: albu1
Song: song1
Genre: Hip Hop
Length: 2:50
Times: 2
Rating: 4

Record 2
Artist: Michael Jackson
Album: Thriller
Song: Thriller
Genre: Pop
Length: 3:40
Times: 3
Rating: 5

1.Load
2.Store
3.Display
4.Insert
5.Delete
6.Edit
7.Sort
8.Rate
9.Play
10.Shuffle
11.Exit
Enter your choice: 6

Enter the artist name : jennifer lopez

Artist: Jennifer Lopez
Album: albu1
Song: song1
Genre: Hip Hop
Length: 2:50
Times: 2
Rating: 4

Is this the record you want to edit ? (y/n): y

Enter new values for the record:
Artist: jenni

Album: my album

Song title: my title

Genre: my gener

Duration (min:sec) :4:50

Rating: 3

Record edited successfully.
1.Load
2.Store
3.Display
4.Insert
5.Delete
6.Edit
7.Sort
8.Rate
9.Play
10.Shuffle
11.Exit
Enter your choice: 8

Record 1
Artist: jenni
Album: my album
Song: my title
Genre: my gener
Length: 4:50
Times: 2
Rating: 3

Record 2
Artist: Michael Jackson
Album: Thriller
Song: Thriller
Genre: Pop
Length: 3:40
Times: 3
Rating: 5

Which record number do you want to rate ? 1

Enter rating (1-5): 2

1.Load
2.Store
3.Display
4.Insert
5.Delete
6.Edit
7.Sort
8.Rate
9.Play
10.Shuffle
11.Exit
Enter your choice: 9

Record 1
Artist: jenni
Album: my album
Song: my title
Genre: my gener
Length: 4:50
Times: 2
Rating: 2

Record 2
Artist: Michael Jackson
Album: Thriller
Song: Thriller
Genre: Pop
Length: 3:40
Times: 3
Rating: 5

Enter the song number you want to start playing : 1

Now playing my title
Now playing Thriller
1.Load
2.Store
3.Display
4.Insert
5.Delete
6.Edit
7.Sort
8.Rate
9.Play
10.Shuffle
11.Exit
Enter your choice: 11

Feel free to reach out if you have any doubts.
Rate if the answer was helpful.
Thanks

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