5.3. 박인서 ¶
- 큐
#include <stdio.h>
#include <stdlib.h>
typedef struct node{
int val;
struct node* next;
}node;
void push(node *, int);
int pop(node *);
int main()
{
node head;
head.next=NULL;
push(&head,1);
push(&head,2);
push(&head,3);
push(&head,4);
printf("%d ",pop(&head));
printf("%d ",pop(&head));
printf("%d ",pop(&head));
printf("%d ",pop(&head));
return 0;
}
void push(node * target, int val)
{
node * newnode=(node *)malloc(sizeof(node));
node * temp=target->next;
newnode->val=val;
target->next=newnode;
newnode->next=temp;
}
int pop(node * target)
{
int res;
node * kill=(node *)malloc(sizeof(node));
if(target==NULL) abort();
else if(target->next->next!=NULL) res=pop(target->next);
else
{
res=target->next->val;
kill=target->next;
target->next=NULL;
free(kill);
}
return res;
}
5.5.1. 큐 ¶
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
int v;
struct node* next;
}node;
node* push(node*, int);
int pop(node*);
void freeAll(node*);
void main(){
node head;
head.next = NULL;
node* last = &head;
last = push(last, 1);
last = push(last, 2);
last = push(last, 3);
last = push(last, 4);
printf("%d\n",pop(&head));
printf("%d\n", pop(&head));
printf("---freeAll----\n");
freeAll(&head);
printf("\n");
}
node* push(node* lt, int val){
node* tmp = (node*)malloc(sizeof(node));
tmp->next = NULL;
tmp->v = val;
lt->next = tmp;
lt = lt->next;
return lt;
}
int pop(node* hd){
if (hd->next != NULL) abort;
node* tmp = (node*)malloc(sizeof(node));
int val;
tmp = hd->next;
val = tmp->v;
hd->next = tmp->next;
free(tmp);
return val;
}
void freeAll(node* hd){
node* ntp;
while (hd->next != NULL){
ntp = hd->next;
printf("%d ", ntp->v);
ntp = ntp->next;
free(hd->next);
hd->next = ntp;
}
}
