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#include "list.h"
static void eatline(void)
{
while (getchar() != '\n')
continue;
}
static char get_answer(void)
{
printf("\e[39m\nPlease enter choice > ");
return tolower(getchar());
}
static bool CheckList(bool flag)
{
if (!flag)
{
printf("List does not exist! Please initialize it!\n");
return false;
}
return true;
}
int main(void)
{
List L;
char ans;
ElemType e;
int pos;
bool flag = false;
printf("\e[1;1H\e[2J");
OperateMenu();
while ((ans = get_answer()) != 'q')
{
if (strchr("abcdefghijklq",ans) == NULL)
{
fprintf(stderr,"Please enter choice labeled above!\n");
if (ans != '\n')
eatline();
continue;
}
eatline();
if (ans == 'k') // Show menu
{
putchar('\n');
OperateMenu();
continue;
}
if (ans == 'b') // Initialize list
{
InitList(&L);
flag = true;
continue;
}
if (CheckList(flag) == false) // Check initialization
continue;
else if (ans == 'l') // Destroy list
DestroyList(&L);
else if (ans == 'a') // Add element
{
printf("Please enter an number: ");
scanf("%d", &e);
eatline();
if (AddElem(&L, e))
printf("Element adding successful!\n");
else
printf("Element adding failed, please run debug mode!\n");
}
else if (ans == 'c') // Show list length
printf("List contains %d element!\n",ListLength(&L));
else if (ans == 'd') // Get element by position
{
printf("Enter position you want to get: ");
scanf("%d",&pos);
eatline();
int i = ListLength(&L);
if (pos > i || pos <= 0)
{
printf("Position error, List now has %i elements!\n", i);
continue;
}
printf("Position %d: %d",pos,GetElem(&L,pos));
}
else if (ans == 'e') // Get position by element
{
printf("Enter element value: ");
scanf("%d", &e);
eatline();
if ((pos = LocateElem(&L,e)) == 0)
{
printf("Element %d is not in this list!\n",e);
continue;
}
printf("Element position: %d\n",pos);
}
else if (ans == 'f') // Get prior element
{
printf("Enter element: ");
scanf("%d", &e);
eatline();
if ((pos = LocateElem(&L,e)) == 0)
{
printf("Element %d is not in this list!\n",e);
continue;
}
else if (pos == 1)
{
printf("First element, no prior element!\n");
continue;
}
printf("Prior element of element %d is %d\n",
e,PriorElem(&L,e));
}
else if (ans == 'g') // Get next element
{
printf("Enter element: ");
scanf("%d", &e);
eatline();
if ((pos = LocateElem(&L,e)) == 0)
{
printf("Element %d is not in this list!\n",e);
continue;
}
else if(pos == ListLength(&L))
{
printf("Last element, no next element!\n");
continue;
}
printf("Next element of element %d is %d\n",
e,NextElem(&L,e));
}
else if (ans == 'h') // Insert an element
{
printf("Enter position you want to put: ");
scanf("%d", &pos);
printf("Enter element you want to add: ");
scanf("%d", &e);
eatline();
if (!InsertElem(&L,e,pos))
{
printf("Insert error!\n");
continue;
}
printf("Insert successful!\n");
}
else if (ans == 'i') // Delete an element
{
int i = ListLength(&L);
printf("Enter position you want to delete: ");
scanf("%d", &pos);
eatline();
if (pos <= 0)
{
printf("position should be greater than 0!\n");
continue;
}
else if (pos > i || !DeleteElem(&L,pos))
{
printf("Position error, %d elements in list\n",
i);
puts("Delete failed");
continue;
}
puts("Delete successful!");
}
else if (ans == 'j')
TraverseList(&L);
}
if (flag)
free(L);
puts("Thanks for using this utility!\n");
return 0;
}
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