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#include <stdlib.h>
struct node { int data;
struct node *next;
};
struct node *head = NULL;
struct node *current = NULL;
//insert link at the first location
void insert(int data) {
// Allocate memory for new node;
struct node *link = (struct node*) malloc(sizeof(struct node));
link->data = data; link->next = NULL;
// If head is empty, create new list
if(head==NULL) {
head = link;
head->next = link;
return;
}
current = head;
// move to the end of the list
while(current->next != head)
current = current->next;
// Insert link at the end of the list
current->next = link;
// Link the last node back to head
link->next = head;
}
//display the list
void printList() {
struct node *ptr = head;
printf("n[head] =>");
//start from the beginning
while(ptr->next != head) {
printf(" %d =>",ptr->data);
ptr = ptr->next;
}
printf(" %d =>",ptr->data);
printf(" [head]n");
}
int main() {
insert(10);
insert(20);
insert(30);
insert(1);
insert(40);
insert(56);
printList();
system("pause");
return 0;
}
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