Updated the final file and source and zip

This commit is contained in:
2020-08-03 19:01:26 +07:00
parent caee955384
commit 3b0d1b5ed7
6 changed files with 288 additions and 0 deletions

6
final/README.md Normal file
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### Guide
#### Compile
```shell
gcc q1.c -o q1
./q1
```

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final/q1.c Normal file
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#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#define BUFFER_SIZE 128
#define MAX_NO_OF_UNITS 4
#define NAME_SIZE 20
const char *FILE_STUDENT_DATA_PATH = "./students.txt";
struct person_tag
{
char name[20];
char id[10];
};
struct course_tag
{
char course_name[20];
int no_of_units;
int marks[MAX_NO_OF_UNITS];
float avg;
};
struct student_tag
{
struct person_tag student_info;
struct course_tag course_info;
struct student_tag *next;
} * head;
// typedef for declared to use as data type
typedef struct person_tag PERSON;
typedef struct course_tag COURSE;
typedef struct student_tag STUDENT;
// file function
void read_file();
// util functions
int menu();
void print_welcome();
void print_student(STUDENT *student);
void release(STUDENT *data);
int find_min_in_array(int *array);
STUDENT *search_student_by_name_or_id(char search_key[NAME_SIZE]);
STUDENT *find_maximum_avg();
STUDENT *add_last_student(STUDENT *nodes, STUDENT *element);
// core functions
void display_students();
void search_student();
void find_maximum();
void find_failed();
void update_file();
void quite();
// Linked list functions
void add_student(char student_name[20], char student_id[10], char course_name[20], int no_of_units, int marks[MAX_NO_OF_UNITS]);
int count_elements(STUDENT *elements);
int count();
int main(void)
{
// variable use for menu selected
int selected;
print_welcome();
// init the read data from the file
read_file();
while (1)
{
selected = menu();
switch (selected)
{
case 1:
display_students();
break;
case 2:
search_student();
break;
case 3:
find_maximum();
break;
case 4:
find_failed();
break;
case 5:
update_file();
break;
case 6:
quite();
break;
default:
printf("cannot find your option!");
break;
}
}
}
void print_welcome()
{
printf("Welcome!\n");
}
void display_students()
{
read_file();
STUDENT *student = head;
if (student == NULL)
{
printf("\nNo student!\n");
return;
}
print_student(student);
}
void print_student(STUDENT *student)
{
int records_count = 0;
printf("\n================ Student Details ================\n");
while (student != NULL)
{
printf("\n");
printf("Student Name: %s\n", student->student_info.name);
printf("Student ID: %s\n", student->student_info.id);
printf("Course Name: %s\n", student->course_info.course_name);
printf("No of units: %d\n", student->course_info.no_of_units);
printf("Marks: [ ");
for (int i = 0; i < student->course_info.no_of_units; i++)
{
printf("%d ", student->course_info.marks[i]);
}
printf("]\n");
printf("Avg: %.2f\n", student->course_info.avg);
student = student->next;
records_count++;
}
// output the records count
printf("\nRecords: %d has been loaded successfully!\n", records_count);
// clean up the memory
// after output the data
// because we don;t need it anymore after output
release(student);
}
int menu()
{
printf("\n(1) Display students details\n");
printf("(2) Search for a students mark\n");
printf("(3) Find the details of student with the largest average\n");
printf("(4) Find the details of failed students\n");
printf("(5) Add new student to the record\n");
printf("(6) Quit program\n");
int choosen;
printf("\nEnter your option: ");
scanf("%d", &choosen);
return choosen;
}
void add_student(char student_name[20], char student_id[10], char course_name[20], int no_of_units, int marks[MAX_NO_OF_UNITS])
{
STUDENT *temp, *iterator;
temp = (struct student_tag *)malloc(sizeof(struct student_tag));
PERSON info;
memcpy(info.name, student_name, 20);
memcpy(info.id, student_id, 10);
COURSE course;
memcpy(course.course_name, course_name, 20);
course.no_of_units = no_of_units;
// memcpy(course.marks, marks);
float sum = 0;
for (int i = 0; i < no_of_units; i++)
{
course.marks[i] = marks[i];
sum += marks[i];
}
course.avg = sum / no_of_units;
temp->student_info = info;
temp->course_info = course;
// reference in head
iterator = head;
if (head == NULL)
{
head = temp;
head->next = NULL;
}
else
{
while (iterator->next != NULL)
{
iterator = iterator->next;
}
temp->next = NULL;
iterator->next = temp;
}
}
int count_elements(STUDENT *elements)
{
int n = 1;
STUDENT *temp;
temp = elements;
if (head == NULL)
{
return 0;
}
while (temp->next != NULL)
{
n++;
temp = temp->next;
}
return n;
}
int count()
{
return count_elements(head);
}
void search_student()
{
char search_key[NAME_SIZE];
printf("Enter student name or id to search: ");
scanf("%s", &search_key);
STUDENT *found_student = search_student_by_name_or_id(search_key);
if (found_student == NULL)
{
printf("\nNo student found!\n");
return;
}
print_student(found_student);
}
STUDENT *search_student_by_name_or_id(char search_key[NAME_SIZE])
{
// refresh data from file first
read_file();
STUDENT *temp = head;
while (temp != NULL)
{
if (strcmp(temp->student_info.name, search_key) == 0 || strcmp(temp->student_info.id, search_key) == 0)
{
printf("\nSearch found with key: %s\n", search_key);
// set the temp next to null
// and free up the memory
temp->next = NULL;
free(temp->next);
// return the current temp
// that found in current search
return temp;
}
temp = temp->next;
}
return NULL;
}
STUDENT *find_maximum_avg()
{
// refresh data from file first
read_file();
STUDENT *temp = head, *max;
max = temp->next;
while (temp != NULL)
{
if (max == NULL)
{
return temp;
}
if (max->course_info.avg < temp->course_info.avg)
{
max = temp;
}
temp = temp->next;
}
// release the max next record
// set max next element to NULL
// because we use only one record
release(max->next);
max->next = NULL;
return max;
}
int find_min_in_array(int *array)
{
if (array == NULL)
{
return -1;
}
int min = array[0];
size_t size = sizeof(array) / sizeof(array[0]);
for (int i = 1; i < size; i++)
{
if (array[i] < min)
{
min = array[i];
}
}
return min;
}
STUDENT *add_last_student(STUDENT *nodes, STUDENT *element)
{
STUDENT *temp = nodes, *node;
node = (struct student_tag *)malloc(sizeof(struct student_tag));
node->student_info = element->student_info;
node->course_info = element->course_info;
node->next = NULL;
if (nodes == NULL)
{
nodes = node;
return nodes;
}
// store current as tempo
// ref for nodes
temp = nodes;
while (temp->next != NULL)
{
temp = temp->next;
}
temp->next = node;
return nodes;
}
// ISSUE: can't find all failed students
// It's just return one record back
STUDENT *find_failed_mark(int upper_mark)
{
// refresh data from file first
read_file();
printf("Count elements: %d\n", count());
STUDENT *temp = head, *failed_students = NULL;
int count = count_elements(temp);
printf("Temp count elements: %d", count);
int run_count = 0;
while (temp != NULL)
{
run_count++;
int min = find_min_in_array(temp->course_info.marks);
if (min < upper_mark)
{
printf("\nRun min: %d\n", min);
failed_students = add_last_student(failed_students, temp);
}
temp = temp->next;
}
printf("\nRun count: %d", run_count);
return failed_students;
}
void find_maximum()
{
// refresh data from file first
read_file();
STUDENT *max_student = find_maximum_avg();
if (max_student == NULL)
{
printf("\nNo maximum student found!\n");
return;
}
printf("\nFind maximum avg was found with: %0.2f\n", max_student->course_info.avg);
print_student(max_student);
}
void find_failed()
{
int upper_mark = 50;
STUDENT *failed_students = find_failed_mark(upper_mark);
if (failed_students == NULL)
{
printf("\nNo failed student found!\n");
return;
}
printf("\nFind the failed students that at least one mark less than %d\n", upper_mark);
print_student(failed_students);
}
void update_file()
{
FILE *file;
file = fopen(FILE_STUDENT_DATA_PATH, "a");
char name[20];
char id[10];
char course_name[20];
int no_of_units;
int marks[MAX_NO_OF_UNITS];
printf("Enter student name: ");
scanf("%s", &name);
printf("Enter student id: ");
scanf("%s", &id);
printf("Enter course name: ");
scanf("%s", &course_name);
again:
printf("Enter no of units: ");
scanf("%d", &no_of_units);
if (no_of_units > MAX_NO_OF_UNITS && no_of_units <= 0)
{
printf("\nyou cannot input the units bigger than %d or less than 0\n", MAX_NO_OF_UNITS);
getchar();
goto again;
}
for (int i = 0; i < no_of_units; i++)
{
printf("Enter mark[%d]: ", i + 1);
scanf("%d", &marks[i]);
}
if (count() > 0)
{
fputs("\n", file);
}
fputs(name, file);
fputs("\n", file);
fputs(id, file);
fputs("\n", file);
fputs(course_name, file);
fputs("\n", file);
fprintf(file, "%d", no_of_units);
for (int i = 0; i < no_of_units; i++)
{
fputs("\n", file);
fprintf(file, "%d", marks[i]);
}
fclose(file);
printf("\nRecord saved successfully!\n");
// reload data into linked list again
// read_file();
// show back the all results
display_students();
}
void read_file()
{
// release nodes
// we need to clean up the memory
if (head != NULL)
{
STUDENT *temp;
while (head != NULL)
{
temp = head;
head = head->next;
free(temp);
}
}
FILE *file;
file = fopen(FILE_STUDENT_DATA_PATH, "r");
if (file == NULL)
{
printf("cannot read file: %s", FILE_STUDENT_DATA_PATH);
exit(EXIT_FAILURE);
}
char student_name[20];
char student_id[10];
char course_name[20];
int no_of_units;
int marks[4];
int i;
while (!feof(file))
{
char no[BUFFER_SIZE];
fgets(student_name, sizeof student_name, file);
fgets(student_id, sizeof student_id, file);
fgets(course_name, sizeof course_name, file);
fgets(no, sizeof no, file);
i = 0;
while (student_name[i] != '\n')
{
i++;
}
student_name[i] = '\0';
i = 0;
while (student_id[i] != '\n')
{
i++;
}
student_id[i] = '\0';
i = 0;
while (course_name[i] != '\n')
{
i++;
}
course_name[i] = '\0';
no_of_units = atoi(no);
for (int j = 0; j < no_of_units; j++)
{
char mark[BUFFER_SIZE];
fgets(mark, sizeof mark, file);
sscanf(mark, "%d", &marks[j]);
}
// add into linked list
add_student(student_name, student_id, course_name, no_of_units, marks);
}
fclose(file);
}
void quite()
{
printf("\nGoodbye!");
exit(EXIT_SUCCESS);
}
void release(STUDENT *data)
{
if (data == NULL)
{
return;
}
// free the nodes
// because it can be use in memory
// we need to clear it first
// before we re-initailize the new data
STUDENT *temp;
while (data != NULL)
{
temp = data;
data = data->next;
free(temp);
}
}

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#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#define STUDENT_ID_SIZE 10
#define CHAR_INT '0'
struct studentID
{
int value;
struct studentID *next;
};
typedef struct studentID STUDENTID;
typedef STUDENTID *STUDENTIDPtr;
int main()
{
const char student_id[] = "1001245345";
// 1. creation nodes
size_t student_id_len = sizeof(student_id) / sizeof(student_id[0]) - 1;
STUDENTIDPtr student_ptr_1 = (STUDENTIDPtr)malloc(sizeof(STUDENTID));
STUDENTIDPtr student_ptr_2 = (STUDENTIDPtr)malloc(sizeof(STUDENTID));
STUDENTIDPtr student_ptr_3 = (STUDENTIDPtr)malloc(sizeof(STUDENTID));
STUDENTIDPtr student_ptr_4 = (STUDENTIDPtr)malloc(sizeof(STUDENTID));
STUDENTIDPtr student_ptr_5 = (STUDENTIDPtr)malloc(sizeof(STUDENTID));
student_ptr_1->next = student_ptr_2;
student_ptr_2->next = student_ptr_3;
student_ptr_3->next = student_ptr_4;
student_ptr_4->next = student_ptr_5;
student_ptr_5->next = NULL;
// 2. fill the node's values
STUDENTIDPtr temp = student_ptr_1;
int last_len = 5;
while (temp != NULL)
{
temp->value = student_id[student_id_len - last_len] - CHAR_INT;
temp = temp->next;
last_len--;
}
// 3. removes dup
STUDENTIDPtr temp1, temp2, duplicate;
temp1 = student_ptr_1;
while (temp1 != NULL && temp1->next != NULL)
{
temp2 = temp1;
while (temp2->next != NULL)
{
if (temp1->value == temp2->next->value)
{
duplicate = temp2->next;
temp2->next = temp2->next->next;
free(duplicate);
}
else
temp2 = temp2->next;
}
temp1 = temp1->next;
}
// output the result
while (student_ptr_1 != NULL)
{
printf("%d ", student_ptr_1->value);
student_ptr_1 = student_ptr_1->next;
}
printf("\n");
return EXIT_SUCCESS;
}

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#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "time.h"
#define DEPOT_SIZE 10
struct Bus
{
int BusID;
int RouteID;
time_t schedule;
} Depot[DEPOT_SIZE];
typedef enum
{
true,
false
} bool;
void createBuses();
void printBuses();
void scheduleBuses();
void alignupBuses();
void releaseBuses();
void emergency();
// utils variable
bool has_created = false;
bool has_scheduled = false;
bool has_aligned = false;
int top = -1;
// utils function
void clrscr();
void print_depot(struct Bus *depot);
time_t get_random_time();
void confirm_on_finish();
int quicksort_compare_func(const void *elem1, const void *elem2);
bool isEmpty();
int menu();
void remove_index_of_array(int index);
// Main Function
int main()
{
while (1)
{
int selection = menu();
clrscr();
printf("You Select : %d", selection);
printf("\n");
switch (selection)
{
case 1:
createBuses();
break;
case 2:
printBuses();
break;
case 3:
scheduleBuses();
break;
case 4:
alignupBuses();
break;
case 5:
releaseBuses();
break;
case 6:
emergency();
break;
default:
printf("You are enter incorrect option number");
}
confirm_on_finish();
};
return EXIT_SUCCESS;
}
int menu()
{
fflush(stdout);
clrscr();
printf("\nQuestion 3 ");
printf("\n=========================================");
printf("\n");
printf("\n1. Create Buses");
printf("\n2. Print Buses");
printf("\n3. Schedule Buses");
printf("\n4. Align up Buses");
printf("\n5. Release Buses");
printf("\n6. Emergency Buses");
int chosen;
printf("\n\nEnter Your Selection : ");
scanf("%d", &chosen);
return chosen;
}
void createBuses()
{
if (has_created == true)
{
printf("\nYou have created already...");
return;
}
printf("\n\nStart Create Buses...");
for (int i = 0; i < DEPOT_SIZE; i++)
{
top++;
Depot[i].BusID = i + 1;
Depot[i].RouteID = 1000 + (i + i);
printf("\n - Starting Create Bus %d", i + 1);
}
has_created = true;
printf("\nFinish Created Buses");
}
void printBuses()
{
if (has_created == false)
{
printf("\nPlease Create Buses First!");
return;
}
print_depot(Depot);
}
void scheduleBuses()
{
if (has_created == false)
{
printf("\nPlease Create Buses First!");
return;
}
printf("\nStart Scheduling Buses...\n\n");
size_t currentLen = sizeof(Depot) / sizeof(Depot[0]);
for (int i = 0; i < currentLen; i++)
{
printf("\n - Start Random Schedule %d...", i);
Depot[i].schedule = get_random_time();
}
printf("\n\nEnd Scheduling Buses...");
has_scheduled = true;
}
void print_depot(struct Bus *depot)
{
size_t currentLen = sizeof(Depot) / sizeof(*Depot);
for (int i = 0; i < top; i++)
{
printf("Bus ID: %d\n", depot[i].BusID);
printf("Route ID: %d\n", depot[i].RouteID);
char *scheduleForShow = "";
if (depot[i].schedule != 0)
{
scheduleForShow = ctime(&depot[i].schedule);
}
printf("Schdule Time : %s\n\n", scheduleForShow);
}
}
void alignupBuses()
{
if (has_scheduled == false)
{
printf("\n\nYou are not scheduling buses yet ...");
return;
}
size_t currentLen = sizeof(Depot) / sizeof(Depot[0]);
qsort(Depot, sizeof(Depot) / sizeof(*Depot), sizeof(*Depot), quicksort_compare_func);
printf("\n\nFinish Align up Buses Schedule ... ");
has_aligned = true;
}
void releaseBuses()
{
if (has_aligned == false)
{
printf("\n\nYou are not align buses schedule yet ...");
return;
}
int last_index = sizeof(Depot) / sizeof(*Depot) - 1;
remove_index_of_array(last_index);
printf("\n\nRelease Complete...\n\n");
}
void emergency()
{
if (has_aligned == false)
{
printf("\n\nYou are not align buses schedule yet ...");
return;
}
remove_index_of_array(0);
printf("\n\nRelease Complete...\n\n");
}
void remove_index_of_array(int remove_index)
{
int current_len = sizeof(Depot) / sizeof(*Depot);
memmove(Depot + remove_index, Depot + remove_index + 1, (sizeof(Depot) - remove_index - 1) * sizeof(*Depot));
top--;
}
time_t get_random_time()
{
time_t currentTime;
time(&currentTime);
long currentTimeNumber = (long)localtime(&currentTime);
// Random in next 5 hours
long randomAddOnTime = rand() % (60 * 60 * 5);
long additionTime = currentTimeNumber + randomAddOnTime;
return additionTime;
}
void clrscr()
{
system("clear");
}
void confirm_on_finish()
{
printf("\n\nPress Enter to Back to Menu...");
getchar();
getchar();
}
bool isFull()
{
return top == -1;
}
int quicksort_compare_func(const void *elem1, const void *elem2)
{
struct Bus element1 = *((struct Bus *)elem1);
struct Bus element2 = *((struct Bus *)elem2);
if (element1.schedule > element2.schedule)
return -1;
if (element1.schedule < element2.schedule)
return 1;
return 0;
}

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Jon
1101825
Computer
4
88
98
52
95
Peter
112152
Electrical
3
67
40
59
Mary
1201925
Mechanical
4
78
55
79
75
Sherin
1201925
Civil
4
69
53
34
88
Jose
34567
Software
2
34
56