| Line 236: | Line 236: | ||
Person person1 = Person_create(argv[1], argv[2], age, gender); | Person person1 = Person_create(argv[1], argv[2], age, gender); | ||
| − | + | Pereon person2 = Person_copy(person1); //deep copy | |
| − | + | //Person person2 = person1 ;//shallow copy | |
Person_print(person1); | Person_print(person1); | ||
Revision as of 09:46, 4 April 2012
John Ribeiro - Professor Lu 8:30 - 9:20 - Lesson 22
Node * List_serach ( NOde * led, int v ) {
while ( ( led != NULL ) && ( ( led->value ) != v ) )
{
led = led -> next;
}
return led;
}
/* Remember to check if the pointer is equal to NULL. This makes sure that the list exists in the first place. */
Node * List_InsertFront ( Node * head, int v ) {
Node * n = Node_construct(v); n->next = head; return n;
}
Node * List_insertEnd ( Node * head, int v ) {
Node * n = Node_construct(v);
if ( head == NULL )
{
return n;
}
/* If the list is empty create only one node */
Node * p = head;
while ( ( p->next) != NULL )
{
p = p -> next;
}
p->next = n;
return head;
}
Node * List_delete ( Node * head, int v ) {
if ( head == NULL )
{
return NULL;
}
Node * p = head;
while ( ( q != NULL ) && ( ( q->value) != v ) )
{
p = q;
q = q->next;
}
if ( q != NULL )
{
p->next = q->next;
free ( q );
}
return head;
}
- Exam 2 -> 8 - 10 PM this Thursday **
EE 206/207 open book and open note Will cover: 1) File 2) Structure 3) Linked List 4) Recursion
Possibly more questions and 1.5 times longer than exam 1
In main:
Node * head = NULL; head = List_insert ( head, 2 );
Node * p; p = List_search ( head, 6 );
if ( p != NULL ) {
/* The value is found */
}
4/3/2012 Lecture 22_Kailu Song
Node *List_search(Node *t, int v) { while((t != NULL) && (t->value) != v) { t = t->next; } return t; }
Node *List_insertFront(Node *head, int v) { Node *n = Node_construct(v); n->next = head; return n; }
Node *List_insertEnd(Node *t, int v) { Node *n = Node_construct(v); if (t == NULL) { return n; } Node *p = t; while ((p->next) != NULL) { p = p-> next; } return t; }
Node *List_delete(Node *head, int v) { if (head == NULL) { return NULL; } Node *p = head; if ((head ->value) == v) { p = head -> next; free(head); return p; } }
Node *q = p-> next;/*p is not NULL */ while ((q != NULL)&&(q ->value) != v) { p = q; q = q->next; } if (q != NULL) { p->next = q -> next; free(q); } return head; }
main:
Node *head = NULL;(initialize)
head = list_insertFront/End (head, 2);
head = list_delete(head,9);
4/4/2012 Huayi Guo Lecture 22 Professor Niklas Elmqvist
/*
exam
Q1: file I/O;
Q2: structure;
Q3: linked list;
Q4: recursion;
BE SURE TO LOOK AT YOUR ASSIGNMENTS AND EXERCISES
shallow vs deep copy
DEEP COPY is when you are copying not only of the pointer but also the contents that the pointer
is pointing to.
Example:
*/
typedef enum{ MALE, FEMALE }Gender;
struct Person{
char * first;
char * last;
Gender gender;
}Person;
Person Person_create(char * first, char * last, int age, Gender gender)
{
Person person;
person.first = strdup(first); person.last = strdup(last); person.age = age; person.gender = gender; return person;
}
void Person_destroy(Person person)
{
//you need to free the thing that created by strdup!!
free(person.first);
free(person.last);
}
Person_copy(Person person)
{
return Person_create(preson.first, person.last,
person.age, person.gender);
}
Person_addSuffix(Person person, char *middler)
{
char * tmp = malloc(strlen(person->last)_ strlen())
}
Person_print(Person person)
{
printf("first: %s, last %s, age: %d, gender: %s\n", person.first, person. last, person.age,
(person.gender == MALE ? "male":"female"));
}
int main(int argc, char: argv[])
{
if(argc != 5){
return EXIT_FAILURE; }
int age = strtol(argv[3], NULL, 10); Gender gender = (strcmp(argv[4],"male")==0) ? MALE: FEMALE Person person1 = Person_create(argv[1], argv[2], age, gender);
Pereon person2 = Person_copy(person1); //deep copy
//Person person2 = person1 ;//shallow copy
Person_print(person1);
Person_print(person2);
Person_destroy(person1); // Since person2 is deep copy you need to free it // If you do shallow copy then you DONT need to free it, //otherwise it's a segmentation fault Person_destroy(person2);
return EXIT_SUCCESS;
}
/*
- /
