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100%Mean logprob: -0.42049991229907985 (65.67%)
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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 || str == NULL) {
return EXIT_FAILURE;
}
sprintf(str, "%d * %s @ $%.2f ea", head->quantity, head->item_name, head->price);
free(str);
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
//
// Hint: There are many ways to do this
//
int i = 0; char* str = malloc(MAX_ITEM_PRINT_LEN);
node* cur = head;
while (cur!= NULL) {
list_item_to_string(cur, str);
printf("%d: %s\n", i, str);
i++;
cur = cur->next;
}
free(str);
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
//
// Hint: There are many ways to do this
//
node* cur = *head;
if(pos == 0) {
*head = malloc(sizeof(node));
(*head)->quantity = quantity;
(*head)->price = price;
(*head)->item_name = malloc(sizeof(char) * (strlen(item_name) + 1));
strcpy((*head)->item_name, item_name);
(*head)->next = cur;
return EXIT_SUCCESS;
}
if (pos > 0) {
if (cur == NULL) {
return EXIT_FAILURE;
}
for (unsigned int i = 1; i < pos; i++) {
if (cur->next == NULL) {
return EXIT_FAILURE;
}
cur = cur->next;
}
}
node* new = malloc(sizeof(node));
new->quantity = quantity;
new->price = price;
new->item_name = malloc(sizeof(char) * (strlen(item_name) + 1));
strcpy(new->item_name, item_name);
new->next = cur->next;
cur->next = new;
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
//
// Hint: There are many ways to do this
//
if (head == NULL || *head == NULL) {
return EXIT_FAILURE;
}
node* cur = *head;
if (pos == 0) {
cur->quantity = quantity;
cur->price = price;
strcpy(cur->item_name, item_name);
return EXIT_SUCCESS;
}
for (unsigned int i = 0; i < pos; i++) {
if (cur->next == NULL) {
return EXIT_FAILURE;
}
cur = cur->next;
}
cur->quantity = quantity;
cur->price = price;
strcpy(cur->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
//
// Hint: There are many ways to do this
//
if (head == NULL || *head == NULL) {
return EXIT_FAILURE;
}
if (pos == 0) {
*head = (*head)->next;
return EXIT_SUCCESS;
}
node* cur = *head;
for (unsigned int i = 0; i < pos - 1; i++) {
if (cur->next == NULL) {
return EXIT_FAILURE;
}
cur = cur->next;
}
if (cur->next!= NULL) {
cur->next = cur->next->next;
}
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
//
// Hint: There are many ways to do this
//
if (head == NULL || *head == NULL) {
return EXIT_FAILURE;
}
if (pos1 == pos2) {
return EXIT_SUCCESS;
}
node* prev1 = NULL;
node* cur1 = *head;
for (unsigned int i = 0; i < pos1 - 1; i++) {
if (cur1->next == NULL) {
return EXIT_FAILURE;
}
prev1 = cur1;
cur1 = cur1->next;
}
node* prev2 = NULL;
node* cur2 = *head;
for (unsigned int i = 0; i < pos2 - 1; i++) {
if (cur2->next == NULL) {
return EXIT_FAILURE;
}
prev2 = cur2;
cur2 = cur2->next;
}
node* temp = cur1->next;
cur1->next = cur2->next;
cur2->next = temp;
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 || pos == NULL) return EXIT_FAILURE;
node* cur = head;
int max_price = 0;
while (cur!= NULL) {
if (cur->price > max_price) max_price = cur->price;
cur = cur->next;
}
pos = &max_price;
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* cur = head;
float total_cost = 0;
while (cur!= NULL) {
total_cost += cur->quantity*cur->price;
cur = cur->next;
}
total = &total_cost;
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
FILE * file;
file = fopen(filename, "w");
node * cur = head;
if (file == NULL) return EXIT_FAILURE;
while (cur!= NULL) {
fprintf(file, "%s,%f,%d\n", cur->item_name, cur->price, cur->quantity);
cur = cur->next;
}
fclose(file);
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
FILE * file;
file = fopen(filename, "r");
if (file == NULL) return EXIT_FAILURE;
node * cur = *head;
if (cur == NULL) return EXIT_FAILURE;
while (cur->next!= NULL) cur = cur->next;
char * new_name; int new_price; int new_quant;
while (fscanf(file, "%s,%d,%d\n", new_name, &new_price, &new_quant) > 0) {
node * new = malloc(sizeof(node));
new->item_name = new_name;
new->price = new_price;
new->quantity = new_quant;
cur->next = new;
new->next = NULL;
cur = cur->next;
if (cur == NULL) return EXIT_FAILURE;
}
if (fscanf(file, "%s,%d,%d\n", new_name, &new_price, &new_quant) < 0) return EXIT_FAILURE;
fclose(file);
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
// two iter nodes. one to go through and another to find duplicates for each node.
// when dup found, remove
node * main = *head;
node * findDup = *head;
int count = 0;
int dupCount;
if (main == NULL || findDup == NULL) return EXIT_FAILURE;
while (main->next!= NULL) {
findDup = *head;
dupCount = 0;
while (findDup->item_name!= main->next->item_name) {
findDup = findDup->next;
dupCount ++;
}
if (dupCount <= count) { // found duplicate
findDup->quantity += main->next->quantity;
main->next = main->next->next;
} // else did not find duplicate
main = main->next;
count++;
}
return EXIT_SUCCESS;
}