Record: C # programming strings

Aside from programming syntax rules, programming is like processing strings.

C # string story:

1. char

Char c = 'a'; If char c = "a"; c = 'abc' is incorrect. Single quotes, double quotes, and strings

2. string

String str = "hello ";

The str string value is hello and the length is 5. It is different from the C language here, And the '\ 0 Terminator '.

3. Take the characters in the string

Char c = str [0]; // c = h;

Note that the subscript is out of bounds.

Print every character in the output string.

string str="hello";int size=str.length;for(int i=0; i<size; i++){    Console.WriteLine(str[i]);}

4. Changing and changing strings

650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131228/20340920B-0.png "title =" qqpinyin unnamed .png "data-pinit =" registered "/>

Verify this process:

String str1 = "hello"; // str10 points to the string pointed to by str1, rather than str1, even if str1 points to another string, and, // str10 is not affected string str10 = str1; str1 = "world"; Console. writeLine (str1); Console. writeLine (str10 );

The output result is:

World

Hello

As described here, the initial intention of str10 cannot be changed when str1 is suspected of being in love.

5. string segmentation

String [] Split (param char [] separator );

public static void Main(string [] args)        {                                                                                                                                                                                              string ip="192.168.1.0";            string [] strArray=ip.Split('.');                                                                                                                                                                                          foreach(string str in strArray)            {                Console.WriteLine(str);            }            Console.ReadKey();        }

650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131228/2034091964-1.png "title =" 1.png" data-pinit = "registered"/>

Use '.' to separate the IP address string.

Method of overloading Split:

String stringSplit = "today is very easy to get busy. Today's weather is good. Don't go to work today"; string [] strSplitArray = stringSplit. split (new String [] {"today"}, StringSplitOptions. removeEmptyEntries); foreach (string str in strSplitArray) {Console. writeLine (str );}

Use strings to separate strings.

The printed result is:

Very easy and busy

Good weather

Off duty

6. String replacement method

String stringSplit = "today is very easy to get busy. Today's weather is good, today is not going to work"; string newString = stringSplit. Replace ("today ","**");

Replace "today".

For example, some sensitive vocabulary processing methods in Website forums should be replaced with strings.

This article is from the "Ajax girl" blog!