Program for a sequential file organization, the input data is string of songs and the play function plays (actually displays) the desired song

Program for a sequential file organization, the input data is string of songs and the play function plays (actually displays) the desired song.

    /* Program for a sequential file organization, the input data is string of songs and the play function plays the desired song */

#include <stdio.h>

#include <conio.h>

#include<stdlib.h> /*standard library function header file*/

#include <string.h> /*add(), play (), display() are the functions */

void add();

void play();

void display();

struct tape /*tape is a structure with integer sno and character string*/

{

      int sno;

      char song[20];

};

struct tape t;

FILE *fp = NULL; /* file_pointer */

void main()

{

int ch;

char ans = 'y';

while (ans == 'y' || ans == 'Y')

{

      printf("MENU \n");

      printf(" 1 ADD SONG \n");

      printf(" 2 DISPLAY SONG \n");

      printf(" 3 PLAY SONG \n");

      printf(" 4 EXIT \n");

      printf("Enter your choice :");

      scanf("%d", &ch);

      switch (ch)

      {

      case 1:

            add(); /* function call */

            break;

      case 2:

            display(); /* function call */

            break;

      case 3:

            play(); /* function call */

            break;

      case 4:

            exit(0);

      break;

      default:

      exit(0);

} /* switch */

printf("\n \t continue to menu(y/n)...");

scanf("%c",&ans);

} /* while */

/* main */

void add()

{

char next = 'y';

fp=fopen("music.dat", "a");   /*fopen function creates a new file*/

if(fp== NULL)

{

      printf("file open error ");

      exit(0);

} /* if */

while (next == 'y' || next == 'Y')

{

      printf("Enter song No :\t");

      scanf("%d", &t. sno);

      printf("Enter song name:\t");

      gets (t.song);

      fwrite(&t, sizeof(t),1,fp);   /* fwrite function writes data to the file! */

      printf("Add more songs (y/n)....");

      scanf("%c", &next);

} /* while */

fclose(fp);

} /* add()* */

void display()

{

fp = fopen("music.dat", "r");

if(fp== NULL)

{

      printf("file open error");

      exit(0);

} /* if */

while (fread(&t, sizeof(t), 1,fp))

{

      printf("\n \t");

      printf("%d\t%s", &t.sno, t.song);

} /* while */

fclose(fp);

} /* display */

void play()

{

char name[20]; /* name is a character array */

int flag = 0;

printf("Enter song name to play :");

scanf("%s", name);

fp = fopen("music.dat", "r");

if(fp == NULL)

{

      printf("file open error");

      exit(0);

} /* if */

while (fread(&t, sizeof(t),1,fp))

{

if(strcmp(t.song, name)==0)

{

      flag = 1;

      break;

} /* if */

} /* while */

if(flag == 1)

{

      printf("\n playing song……\n");

      printf("song No.... %d\n", t.sno);

      printf("song name.... %s", t.song);

} /* if */

else

      printf("Not found");

fclose(fp); /* file close function closes a file*/

} /* play() */

OUTPUT

Menu

1 Add song

2 DISPLAY song

3 Play song

4 EXIT

Enter your choice :1

Enter song No: 1

Enter song name : o podu

Add more songs (y/n)....

      continue to menu(y/n)...y

Menu

1 Add song

2. DISPLAY song

3 Play song

4 EXIT

Enter your choice : 1

Enter song No : 2

Enter song name: raja

Add more songs (y/n)....

      continue to menu(y/n)...y

Menu

1 Add song

2 DISPLAY song

3 Play song

4 EXIT

Enter your choice choice :1

Enter song No : 3

Enter song name : kanne

Add more songs (y/n)....

      continue to menu(y/n)...

Menu

1 Add song

2 DISPLAY song

3 Play song

4 EXIT

Enter your choice : 3

Enter song name to play : raja

playing song.....

song No.... 2

song name.... raja

      continue to menu(y/n)... n