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100%Mean logprob: -0.520543374957506 (59.42%)
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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; }
int i = snprintf(str, MAX_ITEM_PRINT_LEN, "%u * %s @ $%.2f ea", head->quantity, head->item_name, head->price);
return EXIT_SUCCESS;
//return EXIT_FAILURE;
}
// 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
char buffer[MAX_ITEM_PRINT_LEN];
if(head == NULL){ return EXIT_FAILURE; }
node *curr = head;
while(curr!= NULL){
list_item_to_string(curr, buffer);
printf("%s\n", buffer);
}
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 *nnode = malloc(sizeof(node));
nnode->item_name = item_name;
nnode->price = price;
nnode->quantity = quantity;
if(pos == 1){
nnode->next = *head;
}
else{
node *curr = *head;
for(unsigned int i = 2; i < pos; i++){
if (curr == NULL){
return EXIT_FAILURE; //list shorter than pos
}
curr = curr->next;
}
nnode->next = curr->next;
curr->next = nnode;
}
*head = nnode;
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;
for(unsigned int i = 1; i < pos; i++){
if(curr == NULL){
return EXIT_FAILURE;
}
curr = curr->next;
}
curr->item_name = item_name;
curr->price = price;
curr->quantity = quantity;
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
if(pos == 1){
node *temp = *head;
*head = temp->next;
free(temp);
return EXIT_SUCCESS;
}
else{
node *curr = *head;
for(int i = 2; i < pos; i++){
if( curr == NULL ){ return EXIT_FAILURE; }
curr = curr->next;
}
if(curr->next == NULL){ return EXIT_FAILURE; }
node *temp = curr->next;
curr->next = curr->next->next;
free(temp);
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
if(pos1 == pos2){return EXIT_SUCCESS;}
if(pos1 > pos2){int t = pos1; pos1=pos2; pos2=t;}
if(pos1 < 1){return EXIT_FAILURE;}
node *p1;
node *p2;
node *curr = *head;
for(int i = 1; i < pos2-1; i++){
if (curr == NULL){
return EXIT_FAILURE;
}
curr = curr->next;
}
p2 = curr;
if(pos1 == 1){
p2->next = *head;
*head = p2;
}
curr = *head;
for(int i = 2; i < pos1-1; i++){
if (curr == NULL){
return EXIT_FAILURE;
}
curr = curr->next;
}
p1 = curr;
//if(p2->next == NULL){return EXIT_FAILURE;}
if(pos2-pos1 == 1){
node *t = p2->next->next;
p1->next = p2->next;
p2->next->next = p2;
p2->next = t;
}
else{
node *t = p1->next;
p1->next = p2->next;
p2->next = t;
t = p1->next->next;
p1->next->next = p2->next->next;
p2->next->next = t;
}
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
//segfaults while commented and unable to debug
// if(head == NULL){
// return EXIT_FAILURE;
// }
// int ind = 1;
// int mpos = 1;
// float max = 0;
// node *d = head;
// while(d!= NULL){
// if(d->price > max){
// mpos = ind;
// max = d->price;
// }
// d = d->next;
// ind += 1;
// }
// return EXIT_SUCCESS;
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
float tot = 0;
node *curr = head;
while(curr!= NULL){
tot += curr->price;
curr = curr->next;
}
*total = tot;
return EXIT_SUCCESS;
}
// save the list to file filename
// the file should be in the following format:
// item_name,price,quantity\n a
// (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 *fptr = fopen(filename, "w");
char buf [100];
node *curr = head;
while(curr!= NULL){
int i = snprintf(buf, 100, "%s,%.2f,%d\n",head->item_name, head->price, head->quantity);
fputs(buf, fptr);
}
fclose(fptr);
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 *fptr = fopen(filename, "r");
char buf [100];
int pos = 1;
while(fgets(buf, 100, fptr)!= NULL){
char t[100];
strcpy(t,buf);
char *pt;
pt = strtok(t, ",");
char *name = pt;
pt = strtok(t, ",");
float price = atof(pt);
pt = strtok(t, ",\n");
int quantity = atoi(pt);
list_add_item_at_pos(head, name, price, quantity, pos);
pos ++;
}
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
node *curr = *head;
while(curr!= NULL){
node *c2 = curr;
while(c2->next!= NULL){
if(c2->next->item_name == curr->item_name && c2->next->price == curr->price){
curr->quantity += c2->next->quantity;
node *t = c2->next;
c2->next = c2->next->next;
}
c2 = c2->next;
}
curr = curr->next;
}
return EXIT_SUCCESS;
}