void display(Node *head)
{
cout<<"\n";
for( ; head ; head=head->next)
cout<<"\t"<<head->name;
cout<<"\n";
}
when head reaches last node
condition head is true , then head will become head->next which is null ,
and it will try to print the name field from of a null value which is error
On Wed, Aug 18, 2010 at 10:53 PM, Raj Jagvanshi <[email protected]>wrote:
> wats d problem in my display()
>
>
>
>
> #include<iostream>
> #include<malloc.h>
> #include <string.h>
>
> using namespace std;
> struct node
> {
> char *name;
> struct node *next;
> };
> typedef struct node Node;
>
> void createList(Node **head )
> {
> char str[20];
> char *p;
> cout<<"Enter a String: " ;
> gets (str) ;
> p = str;
> if((strlen(p))<2)
> return;
> Node *temp=*head;
> Node *newnode=(Node*)malloc(sizeof(Node));
> newnode->name=p;
> newnode->next=NULL;
> if(!temp)
> *head = newnode;
> else
> {
> while(temp->next)
> temp = temp->next;
> temp->next = newnode;
> }
> createList(head);
> }
> void display(Node *head)
> {
> cout<<"\n";
> for( ; head ; head=head->next)
> cout<<"\t"<<head->name;
> cout<<"\n";
> }
> int main()
> {
> Node *head=NULL;
> while(1)
> {
> cout<<"\n\t\tMENU\n";
> cout<<"0 : To exit.\n";
> cout<<"1 : To create a linear link list.\n";
> cout<<"2 : To display the list.\n";
> char choice;
> choice = getchar();
> getchar();
> if(choice=='0')
> break;
> switch(choice)
> {
> case '1':
> createList(&head );
> break;
> case '2':
> display(head);
> break;
> default:
> cout<<"Enter valid choice.";
> }
> }
> system("pause");
> return 0;
> }
>
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