60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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struct Node
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{
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int data;
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struct Node *next;
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};
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typedef struct Node node;
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int main()
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{ /* creating an empty list
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by setting the pointers to NULL simply
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no new nodes are created at this part
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nodes are created when "needed" */
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node *first = NULL;
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node *last = NULL;
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node *itr;
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int n;
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printf("Enter number of elements: ");
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scanf("%d", &n);
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printf("Enter elements: ");
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for(int i = 0; i < n; ++i) {
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node *new = (node*) malloc(sizeof(node));
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new->next = NULL;
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scanf("%d", &new->data);
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if (first == NULL) { // list was empty
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first = new;
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last = new;
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} else
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last->next= new; // add new to the end
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last = new;
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}
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// printing
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printf("The following numbers are listed:\n");
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for (itr = first; itr != NULL; itr = itr->next)
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printf("%d ", itr->data);
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printf("\n");
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// freeing the memory
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printf("Clearing...");
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itr = first;
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while (itr != NULL) {
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first = itr->next;
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free(itr);
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itr = first;
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}
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last = NULL; // just in case
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printf("%p - %p \n", first, last);
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return 0;
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} |