public void remove(int i)
{
MyListItem nextposition = firstItem;
MyListItem position = firstItem;
int j = 0;
while (position != null)
{
position = position.Next;
j++;
}
if (i >= j)
{
Console.WriteLine("｢" + i + "｣番目は保存データ数を越えているため削除失敗");
Console.WriteLine();
return;
}
else if (i < 0)
{
Console.WriteLine(i + " : iの値がゼロより下です。");
Console.WriteLine();
return;
}
else if (i == 0)
{
nextposition = nextposition.Next;
firstItem = nextposition;
}
else
{
position = firstItem;
for (int k = 0; k <= i; k++)
{
nextposition = nextposition.Next;
}
for (int k = 0; k < i - 1; k++)
{
position = position.Next;
}
position.Next = nextposition;
}
Console.WriteLine("｢" + i + "｣番目を削除");
Console.WriteLine();
}
public void add(Object o, int i)
{
MyListItem mylistitem = new MyListItem(o);
MyListItem position = firstItem;
int j = 0;
while (position != null)
{
position = position.Next;
j++;
}
if (i > j && i != 0)
{
Console.WriteLine("｢" + i + "｣番目は保存データ数を越えているため追加失敗");
Console.WriteLine();
return;
}
else if (i < 0)
{
Console.WriteLine(i + " : iの値がゼロより下です。");
Console.WriteLine();
return;
}
else if (i == 0)
{
position = firstItem;
mylistitem.Next = position;
firstItem = mylistitem;
}
else
{
position = firstItem;
for (int k = 0; k < i - 1; k++)
{
position = position.Next;
}
mylistitem.Next = position.Next;
position.Next = mylistitem;
}
Console.WriteLine("｢" + i + "｣番目に｢" + o + "｣を追加");
Console.WriteLine();
}
public void add(Object o)
{
MyListItem mylistitem = new MyListItem(o);
MyListItem position = firstItem;
if (position != null)
{
while (position.Next != null)
{
position = position.Next;
}
position.Next = mylistitem;
}
else
{
firstItem = mylistitem;
}
Console.WriteLine("末尾に｢" + o + "｣を追加");
Console.WriteLine();
}
public void print()
{
MyListItem position = firstItem;
Console.WriteLine("すべてのデータを先頭から順に出力");
if (position != null)
{
while (position != null)
{
Console.Write(position.Item + " ");
position = position.Next;
}
}
else
{
Console.Write("リストにデータが登録されていません");
}
Console.WriteLine();
Console.WriteLine();
}
public MyListItem(Object value, MyListItem id)
{
Item = value;
Next = id;
}
public MyListManager()
{
firstItem = null;
}
