plz tell me why it is not doing proper traversal?

#include <stdio.h>
#include <stdlib.h>
struct node
{
int info;
struct node *next;
};
typedef struct node node;

void main()
{
    node *start,*temp;
    char k; int item;
    start=(node *)malloc(sizeof(node));
    printf("enter the item\n");
    scanf("%d",&(start->info));

    temp=start;
 sos:   printf("do u want to  continue\n1.yes\n2.no\n");
    scanf("%d",&k);

     switch(k)
        {
            case 1:
        {


        (temp->next)=(node *)malloc(sizeof(node));
        printf("enter item\n");
        scanf("%d",&item);
        (temp->next)->info=item;
       
        temp=temp->next;
     
        goto sos;
        break;
        }
        case 2:
        {

temp->next==NULL;
            printf("thank u so much\n");
                printf("after traversal\n");
     temp=start;
printf("%d\n",temp);

    while(temp!=NULL)
    {
        printf("%d\n",temp->info);
        temp=temp->next;


            break;

        }
        }
    }
}
//