#include <stdio.h>
#include <malloc.h>

struct list {
    char *name;
    char *type;
    int occurance;
    struct list *prev;
    struct list *link;
};

struct list *start=NULL,*ptr,*newnode;

void main() {
    int choice = 0;
    char name1[10], type1[10];
    int occ;

    do {
        printf("Enter name:");
        scanf("%s", name1);
        printf("Enter type:");
        scanf("%s", type1);
        printf("Enter occurance:");
        scanf("%d", &occ);
        newnode = (struct list *)malloc(sizeof(struct list));
        newnode->link = NULL;
        newnode->prev = NULL;
        newnode->name = name1;
        newnode->type = type1;
        newnode->occurance = occ;
        if(newnode == NULL) {
            printf("Memory could not be allocated!");
            // exit(0);
        }
        if(start == NULL) {
            start = newnode;
            ptr = start;
            printf("start is: %s", start->name);
        }
        else if(start->link == NULL) {
            start->link = newnode;
            newnode->prev = start;
            ptr = newnode;
        }
        else {
            ptr->link = newnode;
            newnode->prev = ptr;
            ptr = ptr->link;
        }
        printf("Enter 1 to continue: ");
        scanf("%d", &choice);
    } while(choice == 1);

    // display
    ptr = start;
    while(ptr != NULL) {
        printf("%s ", ptr->name);
        printf("%s ", ptr->type);
        printf("%d n", ptr->occurance);
        ptr = ptr->link;
    }
}

newnode->name=name1;
newnode->type=type1;

strcpy(newnode->name, name1);
strcpy(newnode->type, type1);

//allocate memory of node's name attribute with the same amount as name1 (+1 for null terminating character)
newnode->name = malloc(sizeof(char) * (strlen(name1)+1));
newnode->type= malloc(sizeof(char) * (strlen(type1)+1));

struct list {
    char *name;
    char *type;
    // other members
};

// after allocating memory for a new node

newnode->name = name1;  // name1 evaluates to a pointer to name1[0]
newnode->type = type1;  // type1 evaluates to a pointer to type1[0]

newnode->name = strdup(name1); // make a copy of name1 before it's overwritten
newnode->type = strdup(type1);  // make a copy of type1 before it's overwritten