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vendor-info
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Modified structs to typedef, documented all functions

This commit is contained in:
Win 2024-09-18 14:41:05 +07:00
parent a119eac168
commit a6f62cf778
3 changed files with 104 additions and 77 deletions
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vendorInfo
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163
vendorInfo.c
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@ -1,8 +1,8 @@
/*
* vendorInfo.c
*
* Program that
*
* SEN-102 Intro to Programming - Pre-Assessment
* Program that simulates a market containing vendors.
*
* Created by Win (Thanawin Pattanaphol), 28th August 2024
*/
@ -16,7 +16,7 @@
#define MAX_FILENAME_LENGTH 4096
/* STRUCTURES */
struct vendor
typedef struct vendor
{
char vendor_name[20];
char merchandise[15];
@ -24,47 +24,50 @@ struct vendor
int item_price_baht;
int revenue;
int duplicate;
} vendors[MAX_VENDORS];
} vendor;
struct search_r
// Return type for search function
typedef struct search_r
{
int status;
int item_id;
};
} search_r;
struct purchase_r
// Return type for purchase function
typedef struct purchase_r
{
int status;
char vendor_name[20];
int price_owe_baht;
};
} purchase_r;
vendor vendors[MAX_VENDORS];
/* FUNCTION DECLARATION */
void reset_output();
int read_input(char str[], size_t n);
int getstr(char str[], size_t n);
char *strnlower(char *s, size_t n);
struct search_r search
search_r search
(
char query[],
struct vendor vendors[MAX_VENDORS],
vendor vendors[MAX_VENDORS],
int total_vendors
);
struct purchase_r purchase
purchase_r purchase
(
int item_id,
int amount,
struct vendor vendors[MAX_VENDORS]
vendor vendors[MAX_VENDORS]
);
int check_vendors(struct vendor vendors[MAX_VENDORS], int total_vendors);
int check_vendors(vendor vendors[MAX_VENDORS], int total_vendors);
int main()
{
char file_name[MAX_FILENAME_LENGTH];
printf("Enter name of input file: ");
read_input(file_name, MAX_FILENAME_LENGTH);
getstr(file_name, MAX_FILENAME_LENGTH);
FILE *fp;
if ((fp = fopen(file_name, "r")) == NULL)
@ -73,15 +76,16 @@ int main()
exit(EXIT_FAILURE);
}
// calculate file size
// Calculate the file size
fseek(fp, 0, SEEK_END);
unsigned long file_size = ftell(fp);
fseek(fp, 0, SEEK_SET);
// read file to buffer
// Dynamically allocate buffer for file content
char *file_buffer = (char *) malloc(file_size);
int index = 0;
// Reading the file with fgets and formatting them using strtok
while ((fgets(file_buffer, 50, fp) != NULL) && (index <= MAX_VENDORS - 1))
{
char *token = strtok(file_buffer, " ");
@ -102,12 +106,20 @@ int main()
int total_vendors = index;
printf("\n>>> Read %d vendors from file %s\n", total_vendors, file_name);
// print out each vendor's info
// Print out each vendor's info - excluding duplicates.
for (int i = 0; i <= (total_vendors - 1); i++)
{
/*
This is similar to a linear search algorithm
i = the current item
j = the item next to i
i is being compared to j:
- if i == j then mark both i and j as duplicates
- if not, move on to the next two items
*/
for (int j = i + 1; j < total_vendors; j++)
{
if ((strcmp(vendors[i].merchandise, vendors[j].merchandise)) == 0)
{
vendors[i].duplicate = 1;
@ -139,8 +151,7 @@ int main()
}
else
{
printf("\033[0;31mDuplicate record detected!\n");
reset_output();
printf("\e[31m%s\e[m\n", "Duplicate record detected!");
}
}
@ -148,7 +159,6 @@ int main()
while (1)
{
// CHECK IF ALL MERCHANDISE ARE EMPTY
if(check_vendors(vendors, total_vendors) == 0)
{
break;
@ -156,9 +166,12 @@ int main()
char user_query[100];
printf("What do you want to buy? (DONE to end) ");
read_input(user_query, 100);
getstr(user_query, 100);
if (strcmp(user_query, "DONE") == 0)
if (
(strcmp(user_query, "DONE") == 0) ||
(strcmp(user_query, "done") == 0)
)
{
break;
}
@ -179,12 +192,15 @@ int main()
char input[10];
printf("How many do you want to buy? ");
read_input(input, 10);
getstr(input, 10);
// If a character of a string was sent, the return value would always be 0
// If a negative number was sent, the return value will always be negative.
if(atoi(input) > 0)
{
int item_amount = atoi(input);
struct purchase_r response = purchase(item.item_id, item_amount, vendors);
purchase_r response = purchase(item.item_id, item_amount, vendors);
if (response.status == 0)
{
@ -195,28 +211,33 @@ int main()
}
else
{
printf("\033[0;31mSorry -- %s does not have enough items available\n",
response.vendor_name
printf("\e[31m%s -- %s %s\e[m\n",
"Sorry",
response.vendor_name,
"does not have enough items available"
);
reset_output();
}
}
else
{
printf("\033[0;31mYou must enter a positive whole number for the number of items\n");
reset_output();
printf("\e[31m%s\e[m\n",
"You must enter a positive whole number for the number of items"
);
}
}
else if (item.status == 2)
{
printf("\033[0;31mThis item has duplicate records, please choose another item\n");
reset_output();
printf("\e[31m%s\e[m\n",
"This item has duplicate records, please choose another item"
);
}
else
{
printf("\033[0;31mNo vendor in this market sells %s\n", user_query);
reset_output();
printf("\e[31m%s %s\e[m\n",
"No vendor in this market sells",
user_query
);
}
}
}
@ -249,21 +270,15 @@ int main()
};
/*
Output color reset
*/
void reset_output()
{
printf("\033[0m");
};
getstr: Custom read input function
/*
read_input: Custom read input function
str = string itself
n = max amount of characters that the function is able to read into buffer
Parameters:
- str = string itself
- n = max amount of characters that the function is able to read into buffer
reads one character at a time into buffer and adds a null terminator when finish reading
Reads one character at a time into buffer and adds a null terminator when finish reading
*/
int read_input(char str[], size_t n)
int getstr(char str[], size_t n)
{
int ch, i = 0;
@ -286,6 +301,8 @@ int read_input(char str[], size_t n)
- s: String
- n: Length of string
Return values:
- (char *): Lowercased version of the string.
*/
char *strnlower(char *s, size_t n)
{
@ -299,17 +316,18 @@ char *strnlower(char *s, size_t n)
Search function
Parameters:
- query: search query
- vendors: the vendor table
- total_vendors: the amount of vendors
- (string) query: search query
- (vendor) vendors: the vendor table
- (int) total_vendors: the amount of vendors
Return values:
- i: Item Number
- 0: No results found
(search_r) response:
- status: 0 (Found item)
- status: 1 (No results)
- status: 2 (Found duplicate item)
*/
/* TO-DO IMPLEMENT RESPONSE STRUCT */
struct search_r search(char query[], struct vendor vendors[MAX_VENDORS], int total_vendors)
search_r search(char query[], vendor vendors[MAX_VENDORS], int total_vendors)
{
int i;
for (i = 0; i < total_vendors; i++)
@ -319,7 +337,7 @@ struct search_r search(char query[], struct vendor vendors[MAX_VENDORS], int tot
{
if (vendors[i].duplicate == 0)
{
struct search_r response;
search_r response;
response.status = 0;
response.item_id = i;
@ -328,7 +346,7 @@ struct search_r search(char query[], struct vendor vendors[MAX_VENDORS], int tot
}
else
{
struct search_r response;
search_r response;
response.status = 2;
return (response);
}
@ -337,7 +355,7 @@ struct search_r search(char query[], struct vendor vendors[MAX_VENDORS], int tot
if (i == total_vendors)
{
struct search_r response;
search_r response;
response.status = 1;
response.item_id = 0;
return (response);
@ -345,7 +363,7 @@ struct search_r search(char query[], struct vendor vendors[MAX_VENDORS], int tot
};
/*
Purchase function
purchase: Purchase function
Parameters:
- item_id: The item id that the user is purchasing
@ -353,16 +371,19 @@ struct search_r search(char query[], struct vendor vendors[MAX_VENDORS], int tot
- vendors: vendor table
Return values:
-
(purchase_r) response:
- status: 0 (Purchase successful)
- status: 1 (Vendor does not have enough items)
*/
struct purchase_r purchase(int item_id, int amount, struct vendor vendors[MAX_VENDORS])
purchase_r purchase(int item_id, int amount, vendor vendors[MAX_VENDORS])
{
if(amount <= vendors[item_id].inventory_count)
{
// Decrease vendor inventory
vendors[item_id].inventory_count = vendors[item_id].inventory_count - amount;
struct purchase_r response;
purchase_r response;
response.status = 0;
strcpy(response.vendor_name, vendors[item_id].vendor_name);
@ -370,11 +391,11 @@ struct purchase_r purchase(int item_id, int amount, struct vendor vendors[MAX_VE
vendors[item_id].revenue = vendors[item_id].item_price_baht * amount;
return (response);
return response;
}
else
{
struct purchase_r response;
purchase_r response;
response.status = 1;
strcpy(response.vendor_name, vendors[item_id].vendor_name);
@ -383,23 +404,29 @@ struct purchase_r purchase(int item_id, int amount, struct vendor vendors[MAX_VE
};
/*
Check function
check_vendors: Custom function to check if all vendors are empty.
Parameters:
- vendors[MAX_VENDORS]: (vendor) All of the vendors.
- total_vendors: (integer) Total vendors in market.
Return values:
- (int) 0: All vendors are empty.
- (int) 1: There are still items left.
*/
int check_vendors(struct vendor vendors[MAX_VENDORS], int total_vendors)
int check_vendors(vendor vendors[MAX_VENDORS], int total_vendors)
{
int i;
for (i = 0; i < total_vendors; i++)
{
// If there are any items left
// Condition: Vendors that are not empty (Check if not marked as duplicates)
if (vendors[i].inventory_count != 0 && vendors[i].duplicate == 0)
{
return 1;
}
}
// There aren't any
if (i == total_vendors)
{
return 0;

4
vendorsmall.data
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@ -1,4 +1,4 @@
Win phone 1 50
Win books 1 70
Win books 5 100
Peter books 1 70
Amy teeshirts 5 100
Deez computers 5 80