Updated function

work1/single.c

@@ -32,6 +32,11 @@ typedef struct person_tag PERSON;
 typedef struct course_tag COURSE;
 typedef struct student_tag STUDENT;
 
+// util functions
+void display_menu();
+void print_welcome();
+void print_student(STUDENT *student);
+
 // core functions
 void display_students();
 void search_student();
@@ -45,11 +50,6 @@ void quite();
 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();
 
-// util functions
-void display_menu();
-void read_student_to_data();
-void print_welcome();
-
 int main(void)
 {
     // variable use for menu selected
@@ -57,6 +57,9 @@ int main(void)
 
     print_welcome();
 
+    // init the read data from the file
+    read_file();
+
     while (1)
     {
         display_menu();
@@ -99,7 +102,7 @@ void display_students()
 {
     printf("\n");
 
-    read_student_to_data();
+    read_file();
 
     STUDENT *student;
 
@@ -191,7 +194,102 @@ void add_student(char student_name[20], char student_id[10], char course_name[20
     }
 }
 
-void read_student_to_data()
+int count()
+{
+    int n = 1;
+    STUDENT *temp;
+    temp = head;
+    if (head == NULL)
+    {
+        return 0;
+    }
+
+    while (temp->next != NULL)
+    {
+        n++;
+        temp = temp->next;
+    }
+
+    return n;
+}
+
+void search_student()
+{
+    printf("\nNot implement yet!");
+}
+
+void find_maximum()
+{
+    printf("\nNot implement yet!");
+}
+
+void find_failed()
+{
+    printf("\nNot implement yet!");
+}
+
+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)
+    {
+        printf("you cannot input the units bigger than %d\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("\nSaved");
+}
+
+void read_file()
 {
     // init head to null
     head = NULL;
@@ -261,105 +359,6 @@ void read_student_to_data()
     fclose(file);
 }
 
-int count()
-{
-    int n = 1;
-    STUDENT *temp;
-    temp = head;
-    if (head == NULL)
-    {
-        return 0;
-    }
-
-    while (temp->next != NULL)
-    {
-        n++;
-        temp = temp->next;
-    }
-
-    return n;
-}
-
-void search_student()
-{
-    printf("\nNot implement yet!");
-}
-
-void find_maximum()
-{
-    printf("\nNot implement yet!");
-}
-
-void find_failed()
-{
-    printf("\nNot implement yet!");
-}
-
-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) {
-        printf("you cannot input the units bigger than %d\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("\nSaved");
-}
-
-void read_file()
-{
-    printf("\nNot implement yet!");
-}
-
 void quite()
 {
     printf("\nGoodbye!");