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100%Mean logprob: -0.514365654731523 (59.79%)
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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
// create a string representation of the node head.
// Since only a single item is being printed, the string should be
// formatted exactly as shown in the sample output for list_item_to_string
if (head == NULL) {
str = "";
return EXIT_FAILURE;
}
int quantity = head->quantity;
char item_name[MAX_ITEM_PRINT_LEN];
strncpy(item_name, head->item_name, MAX_ITEM_PRINT_LEN);
float price = head->price;
sprintf(str, "%d * %s @ $%.2f ea", quantity, item_name, 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
// print all nodes in the list based on string returned by list_item_to_string
// print the node at the head of the list
char tmp[MAX_ITEM_PRINT_LEN];
node *tmp_node = head;
while (tmp_node!= NULL) {
list_item_to_string(tmp_node, tmp);
tmp_node = tmp_node->next;
}
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
// create a new node with the item
node *new_node = malloc(sizeof(node));
new_node->item_name = item_name;
new_node->quantity = quantity;
new_node->price = price;
// add the node to the list at position given by pos
node *tmp_node;
tmp_node = *head;
unsigned int i = 1;
while(tmp_node!= NULL && i < pos) {
tmp_node = tmp_node->next;
i++;
}
if(tmp_node == NULL) {
new_node->next = NULL;
} else {
new_node->next = tmp_node->next;
tmp_node->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
// update the node at the given position.
node *tmp_node;
tmp_node = *head;
unsigned int i = 1;
while(tmp_node!= NULL && i < pos) {
tmp_node = tmp_node->next;
i++;
}
if(tmp_node == NULL) {
return EXIT_FAILURE;
} else {
tmp_node->item_name = item_name;
tmp_node->price = price;
tmp_node->quantity = quantity;
return EXIT_SUCCESS;
}
return EXIT_FAILURE;
}
// 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
// remove the node at postion pos.
node *tmp_node;
tmp_node = *head;
unsigned int i = 1;
while(tmp_node!= NULL && i < pos) {
tmp_node = tmp_node->next;
i++;
}
if(tmp_node == NULL) {
return EXIT_FAILURE;
} else {
tmp_node->next->next = tmp_node->next;
tmp_node->next->next = tmp_node->next;
free(tmp_node);
return EXIT_SUCCESS;
}
return EXIT_FAILURE;
}
// 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
// swap the nodes at positions pos1 and pos2.
node *tmp_node1;
tmp_node1 = *head;
unsigned int i = 1;
while(tmp_node1!= NULL && i < pos1) {
tmp_node1 = tmp_node1->next;
i++;
}
if(tmp_node1 == NULL) {
return EXIT_FAILURE;
} else {
node *tmp_node2;
tmp_node2 = *head;
i = 1;
while(tmp_node2!= NULL && i < pos2) {
tmp_node2 = tmp_node2->next;
i++;
}
if(tmp_node2 == NULL) {
return EXIT_FAILURE;
} else {
node *tmp_node3;
tmp_node3 = tmp_node1->next;
tmp_node1->next = tmp_node2;
tmp_node3->next = tmp_node1;
tmp_node2->next = tmp_node3;
}
}
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
return EXIT_FAILURE;
}
// 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
return EXIT_FAILURE;
}
// 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
return EXIT_FAILURE;
}
// 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
return EXIT_FAILURE;
}
// 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
return EXIT_FAILURE;
}