Legend: 0%
100%Mean logprob: -0.5677072230424025 (56.68%)
Legend: 0%100%
#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,
if (head!= NULL){
sprintf(str, "%d * %s @ $%.2f ea", head->quantity, head->item_name, head->price);
}
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
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,
node* cur;
cur = head;
int i = 0;
while (cur!= NULL){
i++;
printf("%d: %d * %s @ $%.2f ea\n",i,cur->quantity,cur->item_name,cur->price);
cur = cur->next;
}
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
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,
node* cur = *head;
node* prev = NULL;
for (int i=1; i<pos; i++){
prev = cur;
cur = cur->next;
}
node* new_node = malloc(sizeof(node));
if (pos==1){
new_node->next = *head;
*head = new_node;
new_node->price = price;
new_node->quantity = quantity;
new_node->item_name = item_name;
return EXIT_SUCCESS;
}
new_node->next = prev->next;
prev->next = new_node;
new_node->price = price;
new_node->quantity = quantity;
new_node->item_name = item_name;
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
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,
node* cur = *head;
for (int i=1; i<pos; i++){
cur = cur->next;
}
cur->price = price;
cur->quantity = quantity;
cur->item_name = item_name;
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
return EXIT_SUCCESS;
}
// remove the item at position pos
int list_remove_item_at_pos(node **head, int pos)
{
// TODO: Implement this function,
node *cur = *head;
node *prev, *temp;
if (pos==1){
temp = *head;
*head = temp->next;
temp = NULL;
return EXIT_SUCCESS;
}
for (int i=1; i<pos; i++){
prev = cur;
cur = cur->next;
}
prev->next = cur->next;
cur = NULL;
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
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,
int mind, maxd;
if (pos1<=pos2){mind = pos1; maxd = pos2;}
else {mind = pos2; maxd = pos1;}
node* min = *head;
node* max = *head;
node* temp = *head;
int i=1;
while (temp!= NULL){
if(i==mind){
max = temp;
for (int j=i; j<maxd; j++){
max = max->next;}
temp = min;
min->next = max->next;
max->next = temp->next;
}
i++;
temp = temp->next;
}
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
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,
int max = -10000;
int max_ind;
node* cur;
cur->next = head;
int i = 0;
while (1){
if (cur == NULL){
break;
}
if (cur->price >= max){
max = cur->price;
max_ind = i;
}
i++;
cur = cur->next;
}
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
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,
node* cur;
cur = head;
int cost = 0;
while (1){
if (cur == NULL){
break;
}
cost += cur->price * cur->quantity;
cur = cur->next;
}
*total = cost;
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
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,
node* cur;
cur = head;
FILE *file;
file = fopen(filename, "w");
while(cur!= NULL){
fprintf(file, "%d,%s,%.2f", cur->quantity, cur->item_name, cur->price);
cur = cur->next;
}
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
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,
node* cur;
cur = *head;
while(cur!= NULL){
cur = cur->next;
}
FILE *file;
file = fopen(filename, "w");
while(cur!= NULL){
fscanf(file, "%d,%s,%f", &cur->quantity, cur->item_name, &cur->price);
cur = cur->next;
}
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
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,
node* cur = *head;
node* prev = cur;
const char* item_list[10000];
int flag=0;
int i=0;
while (1){
if(cur == NULL){
break;
}
else{
item_list[i] = cur->item_name;
}
for (int j=0; j<i; j++){
if (cur->item_name == item_list[j]){
flag=1;
}
}
if(flag){
//prev unchanged
cur = cur->next;
i++;
}
else{
prev = cur;
cur = cur->next;
i++;
}
}
node* fut = cur->next;
// return EXIT_SUCCESS or EXIT_FAILURE when appropriate
return EXIT_FAILURE;
}