#include
#include
#define MAX 6
typedef int datatype;
typedef struct
{
datatype data[MAX];
int last;
} sqlist;
sqlist *CreateEmptyList_1()
{
sqlist *L;
L = (sqlist *)malloc(sizeof(sqlist));
L->last = -1;
return L;
}
void CreateEmptyList_2(sqlist **L)
{
*L = (sqlist *)malloc(sizeof(sqlist));
(*L)->last = -1;
return;
}
int LengthList(sqlist *L)
{
return (L->last + 1);
}
int EmptyList(sqlist *L)
{
return (-1 == L->last);
}
int FullList(sqlist *L)
{
return (MAX-1 == L->last);
}
void ClearList(sqlist *L)
{
L->last = -1;
return;
}
void VisitList(sqlist *L)
{
int i;
for (i=0; i<=L->last; i++)
{
printf("%d ", L->data[i]);
}
printf("\n");
return;
}
int LocateList(sqlist *L, datatype x)
{
int i = 0;
while (i <= L->last)
{
if (L->data[i] == x) return i;
i++;
}
return -1;
}
datatype GetList_1(sqlist *L, int pos)
{
return L->data[pos];
}
int GetList_2(sqlist *L, int pos, datatype *x)
{
if ((pos < 0) || (pos > L->last)) return -1;
*x = L->data[pos];
return 0;
}
int InsertList(sqlist *L, datatype x, int pos)
{
int i;
if ((pos < 0) || (pos > L->last+1) || FullList(L)) return -1;
for (i=L->last+1; i>pos; i--)
{
L->data[i] = L->data[i-1];
}
L->data[pos] = x;
L->last++;
return 0;
}
int DeleteList(sqlist *L, int pos)
{
int i;
if ((pos < 0) || (pos > L->last)) return -1;
for (i=pos; ilast; i++)
{
L->data[i] = L->data[i+1];
}
L->last--;
return 0;
}
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