Write a C program to create linear linked list interactively and print out the list and total number of items in the list.

Write a C program to create linear linked list interactively and print out the list and total number of items in the list.

1:  #include<stdio.h>  
2:  #include<conio.h>  
3:  #include<process.h>  
4:  #include<stdlib.h>  
5:  struct node  
6:  {  
7:        int info;  
8:        struct node *next;  
9:  }*head,*last,*temp,*n;  
10:  void menu();  // to select the choise  
11:  void create(); // insert at last  
12:  void display(); // to print the link list  
13:  int i;  
14:  void main()  
15:  {  
16:        i=0;  
17:        clrscr();  
18:        menu();  
19:        getch();  
20:  }  
21:  void menu()  
22:  {  
23:        int ch;  
24:        printf("1. Create\n");  
25:        printf("2. Display\n");  
26:        printf("3. Exit\n");  
27:        printf("Enter choise : ");  
28:        scanf("%d",&ch);  
29:        switch(ch)  
30:        {  
31:              case 1 : create();  
32:              case 2 : display();  
33:              case 3 : printf("You have choose to exit\n");  
34:                     getch();  exit(0);  
35:              default : printf("Invalid choise\n"); menu();  
36:        }  
37:  }  
38:  void create()  
39:  {  
40:        n= new node;  
41:        printf("Enter the information : ");  
42:        scanf("%d",&n->info);  
43:        if(i==0)  
44:        {  
45:              head=n;  
46:              i++;  
47:        }  
48:        else  
49:        {  
50:              last->next=n;  
51:              i++;  
52:        }  
53:        last=n;  
54:        last->next=NULL;  
55:        menu();  
56:  }  
57:  void display()  
58:  {  
59:        if(head==NULL)  
60:        {  
61:              printf("No information in list\n");  
62:              menu();  
63:        }  
64:        temp=head;  
65:        while(temp!=NULL)  
66:        {  
67:              printf("%d->",temp->info);  
68:              temp=temp->next;  
69:        }  
70:        printf("\n");  
71:        printf("Total number of elements in the link list are : %d\n",i);  
72:        menu();  
73:  }  
74:  Output:  
75:  1. Create  
76:  2. Display  
77:  3. Exit  
78:  Enter choise : 1  
79:  Enter the information : 12  
80:  1. Create  
81:  2. Display  
82:  3. Exit  
83:  Enter choise : 1  
84:  Enter the information : 23  
85:  1. Create  
86:  2. Display  
87:  3. Exit  
88:  Enter choise : 1  
89:  Enter the information : 45  
90:  1. Create  
91:  2. Display  
92:  3. Exit  
93:  Enter choise : 2  
94:  12->23->45->  
95:  Total number of elements in the link list are : 3  
96:  1. Create  
97:  2. Display  
98:  3. Exit  
99:  Enter choise : 3  
100:  You have choose to exit