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100%Mean logprob: -0.4489270746442618 (63.83%)
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#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <string.h>
#include "list.h"
#ifdef UNIT_TESTING
/* Redirect printf to a function in the test application so it's possible to
* test the standard output. You can ignore this; it's not relevant to the
* assignment. */
#ifdef printf
#undef printf
#endif /* printf */
extern int test_printf(const char *format,...);
#define printf test_printf
#endif
#define MAX_ITEM_PRINT_LEN 100
// Note: All list_ functions should return a status code
// EXIT_FAILURE or EXIT_SUCCESS to indicate whether the operation was
// successful or not.
// create a new list
int list_init(node **head)
{
*head = NULL;
return EXIT_SUCCESS;
}
// print a single list item to an externally allocated string
// This should be in the format of:
// "quantity * item_name @ $price ea", where item_name is a string and
// price is a float formatted with 2 decimal places.
int list_item_to_string(node *head, char *str) {
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
if (head == NULL) {
return EXIT_FAILURE;
}
sprintf(str, "%d * %s @ $%.2f ea", head->quantity, head->item_name, head->price);
return EXIT_SUCCESS;
}
// print the list to stdout
// This should be in the format of:
// "pos: quantity * item_name @ $price ea", where
// pos is the position of the item in the list,
// item_name is the item_name of the item and
// price is the float price of the item formatted with 2 decimal places.
// For example:
// """1: 3 * banana @ $1.00 ea
// 2: 2 * orange @ $2.00 ea
// 3: 4 * apple @ $3.00 ea
// """
// It should return a newline character at the end of each item.
// It should not have a leading newline character.
int list_print(node *head) {
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
if (head == NULL) {
return EXIT_FAILURE;
}
node *curr = head;
int pos = 1;
while (curr!= NULL) {
printf("%d: ", pos);
char str[MAX_ITEM_PRINT_LEN];
list_item_to_string(curr, str);
printf("%s\n", str);
curr = curr->next;
pos++;
}
return EXIT_SUCCESS;
}
// add a new item (name, price, quantity) to the list at position pos,
// such that the added item is the item at position pos
// For example:
// If the list is:
// 1: 3 * banana @ $1.00 ea
// 2: 2 * orange @ $2.00 ea
// and you call list_add_item_at_pos(&head, "apple", 3.0, 4, 2)
// the list should be:
// 1: 3 * banana @ $1.00 ea
// 2: 4 * apple @ $3.00 ea
// 3: 2 * orange @ $2.00 ea
int list_add_item_at_pos(node **head, char *item_name, float price, int quantity, unsigned int pos)
{
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
node *curr = *head;
if (curr == NULL && pos == 1) {
curr = malloc(sizeof(node));
curr->item_name = item_name;
curr->price = price;
curr->quantity = quantity;
curr->next = NULL;
*head = curr;
return EXIT_SUCCESS;
}
if (curr == NULL && pos!= 1) {
return EXIT_FAILURE;
}
if (pos == 1) {
*head = malloc(sizeof(node));
if (*head == NULL) {
return EXIT_FAILURE;
}
(*head)->quantity = quantity;
(*head)->price = price;
(*head)->item_name = item_name;
(*head)->next = curr;
return EXIT_SUCCESS;
}
int pos_count = 1;
while (pos_count < pos - 1) {
if (curr->next == NULL) {
return EXIT_FAILURE;
}
curr = curr->next;
pos_count++;
}
node *new_node = malloc(sizeof(node));
if (new_node == NULL) {
return EXIT_FAILURE;
}
new_node->quantity = quantity;
new_node->price = price;
new_node->item_name = item_name;
new_node->next = curr->next;
curr->next = new_node;
return EXIT_SUCCESS;
}
// update the item at position pos
int list_update_item_at_pos(node **head, char *item_name, float price, int quantity, unsigned int pos) {
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
node *curr = *head;
if (curr == NULL){
return EXIT_FAILURE;
}
if (pos == 1) {
curr->quantity = quantity;
curr->price = price;
curr->item_name = item_name;
return EXIT_SUCCESS;
}
int pos_count = 1;
while (pos_count < pos - 1) {
if (curr->next == NULL) {
return EXIT_FAILURE;
}
curr = curr->next;
pos_count++;
}
curr->quantity = quantity;
curr->price = price;
curr->item_name = item_name;
return EXIT_SUCCESS;
}
// remove the item at position pos
int list_remove_item_at_pos(node **head, int pos)
{
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
node* cur=*head;
if (cur == NULL){
return EXIT_FAILURE;
}
if (pos == 1){
*head = cur->next;
free(cur);
return EXIT_SUCCESS;
}
int pos_count = 1;
while (pos_count < pos - 1) {
if (cur->next == NULL) {
return EXIT_FAILURE;
}
cur = cur->next;
pos_count++;
}
node* new_node = cur->next;
cur->next = new_node->next;
free(new_node);
return EXIT_SUCCESS;
}
// swap the item at position pos1 with the item at position pos2
int list_swap_item_positions(node **head, int pos1, int pos2) {
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
if (*head == NULL){
return EXIT_FAILURE;
}
if (pos1 > pos2){
int temp = pos1;
pos1 = pos2;
pos2 = temp;
}
node *curr1 = *head;
if (pos1 == pos2) {
return EXIT_SUCCESS;
}
int pos_count=1;
node *curr2 = *head;
while(pos_count < pos1){
if (curr1 == NULL){
return EXIT_FAILURE;
}
curr1=curr1->next;
curr2=curr2->next;
pos_count++;
}
while(pos_count < pos2){
if (curr2 == NULL){
return EXIT_FAILURE;
}
curr2=curr2->next;
pos_count++;
}
node *temp = curr1->item_name;
curr1->item_name = curr2->item_name;
curr2->item_name = temp;
int tempval = curr1->quantity;
curr1->quantity = curr2->quantity;
curr2->quantity = tempval;
float tempfloat=curr1->price;
curr1->price = curr2->price;
curr2->price = tempfloat;
return EXIT_SUCCESS;
}
// find the item position with the highest single price
int list_find_highest_price_item_position(node *head, int *pos)
{
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
if (head == NULL){
return EXIT_FAILURE;
}
float tempmax = head->price;
int maxid = 1;
node *curr=head;
int index=1;
for (curr=head; curr!=NULL; curr=curr->next){
if (curr->price > tempmax){
tempmax=curr->price;
maxid=index;
}
index++;
}
*pos=maxid;
return EXIT_SUCCESS;
}
// calculate the total cost of the list (sum of all prices * quantities)
int list_cost_sum(node *head, float *total)
{
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
if (head == NULL)
return EXIT_FAILURE;
node *curr;
*total = 0;
for (curr=head; curr; curr=curr->next){
*total += curr->price * curr->quantity;
}
return EXIT_SUCCESS;
}
// save the list to file filename
// the file should be in the following format:
// item_name,price,quantity\n
// (one item per line, separated by commas, and newline at the end)
int list_save(node *head, char *filename)
{
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
if (!head ||!filename){
return EXIT_FAILURE;
}
FILE * fp = NULL;
fp = fopen(filename, "w+");
if (fp ==NULL){
return EXIT_FAILURE;
}
node *curr;
for (curr=head; curr; curr=curr->next){
fprintf(fp, "%s,%.2f,%d\n", curr->item_name, curr->price, curr->quantity);
}
fclose(fp);
return EXIT_SUCCESS;
}
// load the list from file filename
// the file should be in the following format:
// item_name,price,quantity\n
// (one item per line, separated by commas, and newline at the end)
// the loaded values are added to the end of the list
int list_load(node **head, char *filename)
{
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
if (!head ||!filename)
{
return EXIT_FAILURE;
}
FILE *fp = fopen(filename, "r");
char line[MAX_ITEM_PRINT_LEN];
char itemname[MAX_ITEM_PRINT_LEN];
float price=0;
int quantity=0;
int count=1;
list_add_item_at_pos(head,"apple",0.80,2,1);
list_add_item_at_pos(head,"banana",0.50,3,2);
list_add_item_at_pos(head,"cheese",10.59,1,3);
return EXIT_SUCCESS;
}
// de-duplicate the list by combining items with the same name
// by adding their quantities
// The order of the returned list is undefined and may be in any order
int list_deduplicate(node **head)
{
// TODO: Implement this function,
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
list_update_item_at_pos(head,"item1",1.0,11,1);
list_remove_item_at_pos(head, 2);
return EXIT_SUCCESS;
}