void fill_list(t_dlist *list, char **av)
{
int y;
y = 1;
while (av[y])
{
add_list_end(list, av[y]);
y++;
}
}
int main()
{
int sel, code;
float grd;
student stud, *ptr;
head = NULL;
while(1)
{
printf("\nMenu selections\n");
printf("---------------\n");
printf("1. Add student at the end\n");
printf("2. Add student\n");
printf("3. View all students\n");
printf("4. View student\n");
printf("5. Modify student\n");
printf("6. Delete student\n");
printf("7. Exit\n");
printf("\nEnter choice: ");
scanf("%d", &sel);
switch(sel)
{
case 1:
case 2: /* To avoid the repetition of the same code we use the same case. Then, the if statement checks the user’s choice and calls the respective function. */
getchar();
printf("Name: ");
gets(stud.name);
printf("Code: ");
scanf("%d", &stud.code);
printf("Grade: ");
scanf("%f", &stud.grd);
if(sel == 1)
add_list_end(&stud);
else
{
printf("\nEnter student code after which the new student will be added: ");
scanf("%d", &code);
add_list(&stud, code);
}
break;
case 3:
if(head == NULL)
printf("\nThe list is empty\n");
else
show_list();
break;
case 4:
if(head == NULL)
printf("\nThe list is empty\n");
else
{
printf("\nEnter student code to search: ");
scanf("%d", &code);
ptr = find_node(code);
if(ptr == NULL)
printf("\nStudent with code = %d does not exist\n", code);
else
printf("\nData:%s %.2f\n\n", ptr->name, ptr->grd);
}
break;
case 5:
if(head == NULL)
printf("\nThe list is empty\n");
else
{
printf("\nEnter student code to modify: ");
scanf("%d", &code);
printf("Enter new grade: ");
scanf("%f", &grd);
ptr = find_node(code);
if(ptr != NULL)
ptr->grd = grd;
else
printf("\nStudent with code = %d does not exist\n", code);
}
break;
case 6:
if(head == NULL)
printf("\nThe list is empty\n");
else
{
printf("\nEnter student code to delete: ");
scanf("%d", &code);
del_node(code);
}
break;
case 7:
if(head != NULL)
free_list();
return 0;
default:
printf("\nWrong choice\n");
break;
}
}
return 0;
}
