static void Main(string[] args)
{
string S = "abcdefghi";
IString str;
str = new SeqString(S);
IString str4 = new SeqString("mnqp");
Console.WriteLine(str.Insert(0, str4));
}
/// <summary>
/// ��ָ��λ��ȡ�Ӵ�
/// </summary>
/// <param name="StartIndex">ȡ�Ӵ���λ��</param>
/// <param name="Count">�Ӵ��ij���</param>
/// <returns>ȡ�õ��Ӵ�</returns>
public IString SubString(int StartIndex, int Count)
{
if (StartIndex < 0 || StartIndex > Length - 1)
throw new Exception("ȡ�Ӵ�λ����Ч.");
if (Count < 0)
throw new Exception("�Ӵ�����С����.");
int left = Length - StartIndex;//ȡ�Ӵ����
Count = (left < Count) ? left : Count;//�Ӵ�ʵ�ʳ���
SeqString str = new SeqString(Count);
for (int i = 0; i < Count; i++)
str.CStr[i] = CStr[i + StartIndex];
return str;
}
/// <summary>
/// ��ָ��λ�ò����Ӵ�
/// </summary>
/// <param name="StartIndex">������</param>
/// <param name="S">������Ӵ�</param>
/// <returns>���봮��õ����´�</returns>
public IString Insert(int StartIndex, IString S)
{
if (S == null)
throw new Exception("�����ַ���Ϊnull.");
if (StartIndex < 0 || StartIndex > Length)
throw new Exception("����λ����Ч.");
SeqString str = new SeqString(S.Length + Length);
for (int i = 0; i < StartIndex; i++)
str.CStr[i] = CStr[i];//ע��str[i]ֱ��ʹ���Ǵ����
for (int i = 0; i < S.Length; i++)
str.CStr[i + StartIndex] = S[i];
for (int i = StartIndex; i < Length; i++)
str.CStr[i + S.Length] = CStr[i];
return str;
}
/// <summary>
/// ��ָ��λ���Ƴ��Ӵ�
/// </summary>
/// <param name="StartIndex">�Ƴ���λ��</param>
/// <param name="Count">�Ƴ��ij���</param>
/// <returns>�Ƴ���õ����´�</returns>
public IString Remove(int StartIndex, int Count)
{
if (StartIndex < 0 || StartIndex > Length - 1)
throw new Exception("�Ƴ�λ����Ч.");
if (Count < 0)
throw new Exception("�Ƴ��ַ�����С����.");
int left = Length - StartIndex;//����Ƴ��ַ�����
Count = (left < Count) ? left : Count;//ʵ���Ƴ��ַ�����
SeqString str = new SeqString(Length - Count);
for (int i = 0; i < StartIndex; i++)
str.CStr[i] = CStr[i];
for (int i = StartIndex + Count; i < Length; i++)
str.CStr[i - Count] = CStr[i];
return str;
}
/// <summary>
/// ��ǰ���Ŀ���
/// </summary>
/// <returns>��ǰ���Ŀ���</returns>
public IString Clone()
{
SeqString str = new SeqString(Length);
for (int i = 0; i < Length; i++)
str.CStr[i] = CStr[i];
return str;
}
