Thread: Linked list question modfiying element contents

a sample code of writting/reading data into the list

Code:

#include<stdio.h>
#include<string.h>

struct node
{
    char name[25];
    struct node *link;
};

struct node * getnode()
{
    return malloc(sizeof(struct node));
}

void clear_buffer(void)
{
    int ch;
    
    while((ch=getchar())!='\n' && ch!=EOF);
}
struct node* insertnode(struct node *h)
{
    struct node *p;
    int data;
    char temp[25];
    
    if(h==NULL)
    {
        h=getnode();
        h->link=NULL;
        p=h;
    }
    else
    {    
        p=getnode();
        p->link=h;
    }
    printf("Enter the name\n?");
    clear_buffer();   
    fgets(temp,sizeof(temp),stdin);   // fgets(p->name,sizeof(p->name),stdin) (better way of doing)
    strcpy(p->name,temp);   
    h=p;
  return h;
}

displaynodes(struct node *h)
{
    while(h!=NULL)
    {
        printf("%s\n",h->name);
        h=h->link;
    }
}

int main()
{
    struct node *h;
    int choice,i,search,del;
  h=NULL;
    
    printf("1. Insert an element\n");
    printf("2. Display elements\n");
    printf("3. Exit \n");
    
     printf("\nEnter your choice\n");
     scanf("%d",&choice);
     
     while(choice!=3)
     {
         switch(choice)
         {
             case 1:
             {
                 h=insertnode(h);
                 break;
             }
             case 2:
             {
                 displaynodes(h);
                 clear_buffer();
                 getchar();
                 break;
             }
             default:
                     printf("Error: Invalid input\n");
                     clear_buffer();
                     getchar();
         }
         printf("\n1. Insert an element\n");
         printf("2. Display elements\n");
         printf("3. Exit \n");
    
         printf("\nEnter your choice\n");
         scanf("%d",&choice);
     }
}
    
/*myouput
1. Insert an element
2. Display elements
3. Exit

Enter your choice
1
Enter the name
?john

1. Insert an element
2. Display elements
3. Exit

Enter your choice
1
Enter the name
?alan

1. Insert an element
2. Display elements
3. Exit

Enter your choice
1
Enter the name
?brian

1. Insert an element
2. Display elements
3. Exit

Enter your choice
2
brian

alan

john

*/

ssharish2005