C#數(shù)組和串操作經(jīng)驗(yàn)總結(jié)
C#數(shù)組有很多值得學(xué)習(xí)的地方,這里我們主要介紹存放字符序列的C#數(shù)組,包括介紹C#串操作等方面
關(guān)于C#數(shù)組和C#串操作:
1)串是由連續(xù)存儲(chǔ)的字符組成
2)C#中的串具有恒定不變的特性,即 一旦被創(chuàng)建,就不能改變長度或者改變其中任何的字符。
3)串的連接、插入和刪除等操作都是生成了新串而沒有改變原串。
4)繼承自 System.object。所以是引用類型(int,bool,char 等都是struct 不是class,是值類型)。
5)System.String 是密封類,所以不能被繼承。
6)雖然System.String 是引用類型,但C#中將String 看作是基元類型,所以不用 new操作符創(chuàng)建實(shí)例,而是使用字符串駐留的機(jī)制。
7)System.String 繼承自 IComparable, ICloneable, IConvertible, IComparable
8)C#提供了StringBuilder類型來支持高效地動(dòng)態(tài)創(chuàng)建字符串。
下面是自定義一個(gè)string類,類中包含一個(gè)字段,用以存放字符序列的C#數(shù)組,還有一些常用的C#串操作。
- public class StringDS
 - {
 - private char[] data;//char數(shù)組
 - //索引器
 - public char this[int index]
 - {
 - get
 - {
 - return data[index];
 - }
 - set
 - {
 - data[index] = value;
 - }
 - }
 - //構(gòu)造函數(shù)
 - public StringDS(char[] arr)
 - {
 - data = new char[arr.Length];
 - for (int i = 0; i < arr.Length; i++)
 - {
 - data[i] = arr[i];
 - }
 - }
 - //構(gòu)造函數(shù)
 - public StringDS(int len)
 - {
 - char[] arr = new char[len];
 - data = arr;
 - }
 - //求串長
 - public int GetLength()
 - {
 - return data.Length;
 - }
 - //串比較
 - public int Compare(StringDS s)
 - {
 - int len=((this.GetLength()<=s.GetLength())?
 - this.GetLength():s.GetLength());
 - int i = 0;
 - for (i = 0; i < len; ++i)
 - {
 - if (this[i] != s[i])
 - {
 - break;
 - }
 - }
 - if (i <= len)
 - {
 - if (this[i] < s[i])
 - {
 - return -1;
 - }
 - else if (this[i] > s[i])
 - {
 - return 1;
 - }
 - }
 - else if (this.GetLength() == s.GetLength())
 - {
 - return 0;
 - }
 - else if (this.GetLength() < s.GetLength())
 - {
 - return -1;
 - }
 - return 1;
 - }
 - //求子串
 - public StringDS SubString(int index, int len)
 - {
 - if ((index<0) || (index>this.GetLength()-1) || (len<0) || (len>this.GetLength()-index))
 - {
 - Console.WriteLine("Position or Length is error!");
 - return null;
 - }
 - StringDS s = new StringDS(len);
 - for (int i = 0; i < len; ++i)
 - {
 - s[i] = this[i + index-1];
 - }
 - return s;
 - }
 - //串連接
 - public StringDS Concat(StringDS s)
 - {
 - StringDS s1 = new StringDS(this.GetLength() +s.GetLength());
 - for (int i = 0; i < this.GetLength(); ++i)
 - {
 - s1.data[i] = this[i];
 - }
 - for (int j = 0; j < s.GetLength(); ++j)
 - {
 - s1.data[this.GetLength() + j] = s[j];
 - }
 - return s1;
 - }
 - //串插入
 - public StringDS Insert(int index, StringDS s)
 - {
 - int len = s.GetLength();
 - int lenlen2 = len + this.GetLength();
 - StringDS s1 = new StringDS(len2);
 - if (index < 0 || index > this.GetLength() - 1)
 - {
 - Console.WriteLine("Position is error!");
 - return null;
 - }
 - for (int i = 0; i < index; ++i)
 - {
 - s1[i] = this[i];
 - }
 - for(int i = index; i < index + len ; ++i)
 - {
 - s1[i] = s[i - index];
 - }
 - for (int i = index + len; i < len2; ++i)
 - {
 - s1[i] = this[i - len];
 - }
 - return s1;
 - }
 - //串刪除
 - public StringDS Delete(int index, int len)
 - {
 - if ((index < 0) || (index > this.GetLength() - 1)
 - || (len < 0) || (len > this.GetLength() - index))
 - {
 - Console.WriteLine("Position or Length is error!");
 - return null;
 - }
 - StringDS s = new StringDS(this.GetLength() - len);
 - for (int i = 0; i < index; ++i)
 - {
 - s[i] = this[i];
 - }
 - for (int i = index + len; i < this.GetLength(); ++i)
 - {
 - s[i] = this[i];
 - }
 - return s;
 - }
 - //串定位
 - public int Index(StringDS s)
 - {
 - if (this.GetLength() < s.GetLength())
 - {
 - Console.WriteLine("There is not string s!");
 - return -1;
 - }
 - int i = 0;
 - int len = this.GetLength() - s.GetLength();
 - while (i < len)
 - {
 - if (this.Compare(s) == 0)
 - {
 - break;
 - }
 - }
 - if (i <= len)
 - {
 - return i;
 - }
 - return -1;
 - }
 - }
 
【編輯推薦】















 
 
 
 
 
 
 