C language implements song information management system

This paper shares the specific code of C language song information management system for your reference, the specific content is as follows

System function: the system works by menu, song information includes: song name, singer, lyricist, composition, album, publication date, publishing company. Try to design 1 hall song management system, so that it can provide the following functions: song information input, modify, insert, delete functions; Song sorting browse function; Query by song name, query by singer and other functions.

The complete implementation code is as follows:

#include "stdio.h" 
#include "stdlib.h" 
#include "string.h" 
// Song information includes: song title, singer, lyrics, composition, album, publication date, publishing company  
typedef struct music 
{ 
  char name[20];  // Da da da  
  char singer[20]; // The singer  
  char authors[20]; // The lyrics  
  char compose[30]; // Composition,  
  char album[20];  // Their album  
  char time[15];  // Publication date  
  char company[30]; // Publishing company  
  struct music *next; 
}music; 
music *head=NULL; 
int length;  // The length of the list  
void create() 
{ 
  music *p1,*p2; 
  length=0; 
  p1=(music *)malloc(sizeof(music)); 
  strcpy(p1->name,"-1"); 
  if(head==NULL) 
    head=p1; 
  printf(" Please enter the name of the song, the artist, the lyrics, the composition, the album, the publication date, the publishing company: /n"); 
  while(1) // As the title 0 Time to quit  
  { 
    p2=(music *)malloc(sizeof(music)); 
    // Enter song information  
    scanf("%s %s %s %s %s %s %s",p2->name,p2->singer,p2->authors,p2->compose,p2->album,p2->time,p2->company); 
    if(strcmp(p2->name,"0")==0) 
    { 
      printf(" Linked list creation complete! /n"); 
      break; 
    } 
    length++; // The length of the list  
    p1->next=p2; 
    p2->next=NULL; 
    p1=p1->next; 
  } 
  return ; 
} 
void ModifymusicInfo() 
{ 
  music *p=head->next; 
  char name[20]; 
  printf(" Please enter the song name of the song you want to modify: "); 
  getchar(); 
  scanf("%s",name); 
  while(p!=NULL) 
  { 
    if(strcmp(p->name,name)==0) 
    { 
      printf(" Before modification, the song title is %s The song's message is as follows: /n",name); 
      printf(" The title of the song, the singer, the lyrics, the composition, the album, the publication date, the publishing company: /n"); 
      printf("%s %s %s %s %s %s %s/n",p->name,p->singer,p->authors,p->compose,p->album,p->time,p->company); 
      printf(" Please enter the new album of the song: "); 
      getchar(); 
      scanf("%s",p->album); 
      printf(" Please enter the song of the new publishing company: "); 
      getchar(); 
      scanf("%s",p->company); 
      printf(" After modification, the song title is %s The song's message is as follows: /n",name); 
      printf(" The title of the song, the singer, the lyrics, the composition, the album, the publication date, the publishing company: /n"); 
      printf("%s %s %s %s %s %s %s/n",p->name,p->singer,p->authors,p->compose,p->album,p->time,p->company); 
      return ; 
    } 
    p=p->next; 
  } 
  if(p==NULL) 
  { 
    printf(" The song does not exist! /n"); 
    return ; 
  } 
} 
 
void display() 
{ 
  music *p=head->next; 
  printf(" All the songs in the list are listed below :/n"); 
  printf(" The title of the song, the singer, the lyrics, the composition, the album, the publication date, the publishing company: /n"); 
  while(p!=NULL) 
  { 
    printf("%s %s %s %s %s %s %s/n",p->name,p->singer,p->authors,p->compose,p->album,p->time,p->company); 
    p=p->next; 
  } 
  return ; 
} 
void search() 
{ 
  int num,x,flag; 
  char name[20]; 
  music *p=head->next; 
  printf(" Please select the method of inquiry: /n"); 
  printf("1 , by song name /t 2 , search by singer /n"); 
  scanf("%d",&x); 
  if(x==1) 
  { 
    printf(" The song you need to find is called: "); 
    getchar(); 
    scanf("%s",name); 
    while(p!=NULL) 
    { 
 
      if(strcmp(p->name,name)==0) 
      { 
        printf(" As the title %s The song's message is as follows: /n",name); 
        printf(" The title of the song, the singer, the lyrics, the composition, the album, the publication date, the publishing company: /n"); 
        printf("%s %s %s %s %s %s %s/n",p->name,p->singer,p->authors,p->compose,p->album,p->time,p->company); 
        return ; 
      }   
      p=p->next; 
    } 
    if(p==NULL) 
      printf(" There is no record of this song! /n"); 
  } 
  else if(x==2) 
  { 
    flag=0; 
    printf(" The singer to be searched is: "); 
    getchar(); 
    scanf("%s",name); 
    p=head->next; 
    while(p!=NULL) 
    { 
      if(strcmp(p->singer,name)==0) 
      { 
        if(flag==0) 
        { 
          printf(" The singer is %s The song's message is as follows: /n",name); 
          printf(" The title of the song, the singer, the lyrics, the composition, the album, the publication date, the publishing company: /n"); 
          flag=1; 
        } 
        printf("%s %s %s %s %s %s %s/n",p->name,p->singer,p->authors,p->compose,p->album,p->time,p->company); 
      }   
      p=p->next; 
    } 
    if(p==NULL && flag==0) 
    { 
      printf(" There is no record of the singer! /n"); 
      return; 
    } 
  } 
  return ; 
} 
 
void insert() 
{ 
  int num,i; 
  music *p,*q; 
  p=head; 
 
  printf(" Please enter the position you want to insert : "); 
  scanf("%d",&num); 
  if(num>length) 
  { 
    printf(" The position to insert cannot be found /n"); 
    return ; 
  } 
  else 
  { 
    printf(" Please enter the name of the song, the artist, the lyrics, the composer, the album, the time of publication, the publishing company of the music you want to insert: /n"); 
    q=(music *)malloc(sizeof(music)); 
    // Enter song information  
    scanf("%s %s %s %s %s %s %s",q->name,q->singer,q->authors,q->compose,q->album,q->time,q->company); 
    while(p!=NULL) 
    { 
      if(strcmp(p->name,q->name)==0) 
      { 
        printf(" This song already exists, cannot insert! /n"); 
        return ; 
      } 
      p=p->next; 
    } 
    p=head; 
    for(i=0;i<num;i++) 
      p=p->next; 
    q->next=p->next; 
    p->next=q; 
    length++; 
    printf(" Insert successfully! /n"); 
    return ; 
  } 
}  
 
void Delete() 
{ 
  char name[20]; 
  music *p,*q; 
  q=head,p=head->next; 
  printf(" Please enter the name of the song you want to delete :/n"); 
  getchar(); 
  scanf("%s",name); 
 
  while(p!=NULL) 
  { 
    if(strcmp(p->name,name)==0) 
    { 
      q->next=p->next; 
      free(p); 
      length--; 
      printf(" Delete successful! /n"); 
      return ; 
    } 
    p=p->next; 
    q=q->next; 
  } 
  if(p==NULL) 
  { 
    printf(" Can't find the song to delete! /n"); 
    return ; 
  } 
} 
void menu() 
{ 
  printf("________________________________________________________________/n"); 
  printf("|        Songhall song management system                 |/n"); 
  printf("|        0 ,   Log out                   |/n"); 
  printf("|        1 ,   Input song information                 |/n"); 
  printf("|        2 ,   Display song information                 |/n"); 
  printf("|        3 ,   Find something in a linked list 1 song            |/n"); 
  printf("|        4 ,   Deletes the specified song in the linked list              |/n"); 
  printf("|        5 ,   Inserts at the specified location 1 A new node          |/n"); 
  printf("|        6 ,   Modify song information                 |/n"); 
  printf("________________________________________________________________/n"); 
  return ; 
} 
int main(void) 
{ 
  int a; 
  menu(); 
  while(1) 
  { 
    printf(" Please select the corresponding function: "); 
    scanf("%d",&a); 
    switch(a) 
    { 
    case 0: 
      return 0; 
    case 1: 
      create(); 
      menu(); 
      break; 
    case 2: 
      if(head) 
      { 
        display(); 
        menu(); 
      } 
      else 
      { 
        printf(" The list is empty, please create the list first! /n"); 
        menu(); 
      } 
      break; 
    case 3: 
      if(head) 
      { 
        search(); 
        menu(); 
      } 
      else 
      { 
        printf(" The list is empty, please create the list first! /n"); 
        menu(); 
      } 
      break; 
    case 4: 
      if(head) 
      { 
        Delete(); 
        menu(); 
      } 
      else 
      { 
        printf(" The list is empty, please create the list first! /n"); 
        menu(); 
      } 
      break; 
    case 5: 
      if(head) 
      { 
        insert(); 
        menu(); 
      } 
      else 
      { 
        printf(" The list is empty, please create the list first! /n"); 
        menu(); 
      } 
      break; 
    case 6: 
      if(head) 
      { 
        ModifymusicInfo(); 
        menu(); 
      } 
      else 
      { 
        printf(" The list is empty, please create the list first! /n"); 
        menu(); 
      } 
      break; 
    default: 
      break; 
    } 
  } 
  system("pause"); 
  return 0; 
}