1.字符串
1.1程序代码
static void Main(string[] args)
{
string sentence = "Hello!";
char letter = sentence[0];
Console.WriteLine(letter);
char[] letter1 = { 'C', 'H', 'I', 'C', 'K', 'E', 'N' };
string ss = new string(letter1);
Console.WriteLine(ss);
string ss1 = new string('A', 10);
Console.WriteLine(ss1);
Console.WriteLine("The letters in \"Hello\" are:");
for (int i = 0; i < sentence.Length; i++)
{
char letter2 = sentence[i];
Console.Write(letter2 + "\t");
}
string sentence1 = "就快被融化";
string sentence2 = sentence1;
Console.WriteLine("\n{0}\n{1}", sentence1, sentence2);
string sentence3 = "再多看一眼";
string sentence4 = string.Copy(sentence3);
Console.WriteLine(sentence3);
Console.WriteLine(sentence4);
string source = "someone";
char[] destination = { '*', '*', '*', '*', '*', '*', '*', '*', '*', '*' };
int sourceIndex = 2;
int destinationIndex = 3;
int count = 2;
source.CopyTo(sourceIndex, destination, destinationIndex, count);
for (int i = 0; i < destination.Length; i++)
{
Console.Write(destination[i]);
}
string string5 = "Hello";
string string6 = "hello";
if (string5 == string6)
{
Console.WriteLine("\nEqual");
}
else
{
Console.WriteLine("\nUnequal");
}
string string7 = "Hello";
if (string7.Equals("Hello"))
{
Console.WriteLine("\nEqual");
}
else
{
Console.WriteLine("\nUnequal");
}
string string8 = "Dog";
string string9 = "dog";
if (string.Equals(string8, string9))
{
Console.WriteLine("\nEqual");
}
else
{
Console.WriteLine("\nUnequal");
}
string string10 = "better";
string string11 = "best";
switch (string10.CompareTo(string11))
{
case -1: Console.WriteLine(string10 + "<" + string11); break;
case 0: Console.WriteLine(string10 + "=" + string11); break;
case 1: Console.WriteLine(string10 + ">" + string11); break;
default: Console.WriteLine("********"); break;
}
}
2.控制字符串的常用函数
2.1程序代码
static void Main(string[] args)
{
string[] strings = { "started", "starting", "ended", "ending" };
for (int i = 0; i < strings.Length; i++)
{
if (strings[i].StartsWith("st"))
{
Console.WriteLine("\"{0}\" starts with \"st\"", strings[i]);
}
}
for (int i = 0; i < strings.Length; i++)
{
if (strings[i].EndsWith("ed"))
{
Console.WriteLine("\"{0}\" starts with \"ed\"", strings[i]);
}
}
string sentence = "You love to hear Let her go.";
int index1 = sentence.IndexOf('o', 3);
int index2 = sentence.IndexOf("You", 20);
Console.WriteLine(index1);
Console.WriteLine(index2);
int index3 = sentence.IndexOf('o', 6);
int index4 = sentence.IndexOf("You", 20,4);
Console.WriteLine(index3);
Console.WriteLine(index4);
char[] searchLetters= { 'e', 'h' };
int index5 = sentence.IndexOfAny(searchLetters);
int index6 = sentence.IndexOfAny(searchLetters,10);
int index7 = sentence.IndexOfAny(searchLetters,10,3);
Console.WriteLine(index5);
Console.WriteLine(index6);
Console.WriteLine(index7);
int index8 = sentence.LastIndexOfAny(searchLetters);
int index9 = sentence.LastIndexOfAny(searchLetters, 10);
int index10 = sentence.LastIndexOfAny(searchLetters, 10, 3);
Console.WriteLine(index8);
Console.WriteLine(index9);
Console.WriteLine(index10);
string sub=sentence.Substring(12);
Console.WriteLine(sub);
string sub1=sentence.Substring(5,4);
Console.WriteLine(sub1);
char[] seperator = { ' ','o' };
string[] words=sentence.Split(seperator);
foreach (string word in words)
{
Console.WriteLine(word);
}
string string1 = "ok";
string string2=string1.ToUpper();
Console.WriteLine(string2);
string string3 = string2.ToLower();
Console.WriteLine(string3);
string string4 = "tree";
string string5 = string4.Insert(1, "h");
Console.WriteLine(string5);
string string6 = string4.Replace('e', 'd');
Console.WriteLine(string6);
string string7 = string4.Replace("re", "ffd");
Console.WriteLine(string7);
string string8 = string4.Remove(2);
Console.WriteLine(string8);
string string9=string4.Remove(1,2);
Console.WriteLine(string9);
int i1 = 360;
int j1 = 60;
string result = string.Format("{0,6}\n+{1,5}\n----------\n{2,6}", i1, j1, i1 + j1);
Console.WriteLine(result);
}