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Old 04-09-2011, 10:06 AM   #1
30hdrjqjy
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Default 转义字符www.hg69888.com皇冠投注网开户

所有的ASCII码都可以用“\”加数字(一般是8进制数字)来表示。而C中定义了一些字母前加"\"来表 示常见的那些不能显示的ASCII字符,如\0,\t,\n等,就称为转义字符,因为后面的字符,都不是它 本来的ASCII字符意思了。

目录
各种编程语言转义符为什么要用转义字符串转义字符串的组成如何显示空格?JavaScript转义符url 转义字符   转义字符 意义 ASCII码值(十进制)   \a 响铃(BEL) 007   \b 退格(BS) 008   \f 换页(FF) 012   \n 换行(LF) 010   \r 回车(CR) 013   \t 水平制表(HT) 009   \v 垂直制表(VT) 011   \\ 反斜杠 092   \? 问号字符 063   \' 单引号字符 039   \" 双引号字符 034   \0 空字符(NULL) 000   \ddd 任意字符 三位八进制   \xhh 任意字符 二位十六进制   字符型常量   字符型常量所表示的值是字符型变量所能包含的值。我们可以用ASCII表达式来表示一个字符型常量,或 者用单引号内加反斜杠表示转义字符。   'A', '\x2f', '\013';   其中:\x表示后面的字符是十六进制数,\0表示后面的字符是八进制数。   注意:在Turbo C 2.0中,字符型常量表示数的范围是-128到127,除非你把它声明为unsigned,这样就是0到255。   上面我们见到的\x,\n,\a等等都是叫转义字符,它告诉编译器需要用特殊的方式进行处理。下面给出 所有的转义字符和所对应的意义:   转义字符 描述   \' 单引号   \" 双引号   \\ 反斜杠   \0 空字符   \ccc (最多三位)八进制数   \a 声音符   \b 退格符   \f 换页符   \n 换行符   \r 回车符   \t 水平制表符   \v 垂直制表符   \xhh(最多两位)十六进制符各种编程语言转义符  如HTML转义符、java 转义符、xml 转义符、 oracle 转义符、sql 转义符 、sqlserver 转义符、php 转义符、asp 转义符、vb转义符、 javascript 转义符等等,还有网址中的百分号,皇冠免费开户。   例如,HTML的 < > &amp; " &copy; 对别是<,>,&,皇冠投注网站,",&copy;的转义字符   XML就只有5个: < > &amp; " &apos;为什么要用转义字符串  转义字符串(Escape Sequence)也称字符实体(Character Entity)。在HTML中,定义转义字符串的原因有两个:第一个原因是像“<”和“>”这类符号已经用 来表示HTML标签,因此就不能直接当作文本中的符号来使用。为了在HTML文档中使用这些符号,就需要定 义它的转义字符串。当解释程序遇到这类字符串时就把它解释为真实的字符。在输入转义字符串时,要严格遵守字 母大小写的规则。第二个原因是,有些字符在ASCII字符集中没有定义,因此需要使用转义字符 串来表示。   其实所有编程语言,拥有转义字符的原因基本上是两点:一、使用转义字符来表示字符集中定义的字符,比如 ASCll里面的控制字符及回车换行等字符,这些字符都没有现成的文字代号。所以只能用转义字符来表示 ,皇冠备用投注网。二、某一些特定的字符在编辑语言中被定义为特殊用途的字符。这些字符由于被定义为特殊用途,它们失去了原 有的意义。比如说Html中,<被HTML定义为标签的开始,所以当我们转入<时, HTML就会把它当作为开始,而不是当作一个<来看待。再如PHP 的双引号("),被PHP定义为字符串的外围标签,所以如果你在   一对双引号里面,还想要使用双引号,只能使用转义字符了。不然PHP就会报错了。转义字符串的组成   转义字符串(Escape Sequence),即字符实体(Character Entity)分成三部分:第一部分是一个&符号,英文叫ampersand;第二部分是实体(Entit y)名字或者是#加上实体(Entity)编号;第三部分是一个分号。   比如,要显示小于号(<),就可以写 < 或者 < 。   用实体(Entity)名字的好处是比较好理解,一看lt,大概就猜出是less than的意思,皇冠投注网开户,但是其劣势在于并不是所有的浏览器都支持最新的Entity名字。而实体(Entity)编号,各种浏览 器都能处理。   提示:实体名称(Entity)是区分大小写的。   备注:同一个符号,可以用“实体名称”和“实体编号”两种方式引用,“实体名称”的优势在于便于记忆, 但不能保证所有的浏览器都能顺利识别它,而“实体编号”则没有这种担忧,但它实在不方便记忆,足球单场投注。如何显示空格?  通常情况下,HTML会自动截去多余的空格。不管你加多少空格,都被看做一个空格。比 如你在两个字之间加了10个空格,HTML会截去9个空格,只保留一个。为了在网页中增加空格 ,你可以使用 表示空格。JavaScript转义符  转义序列 字符   \b 退格   \f 走纸换页   \n 换行   \r 回车   \t 横向跳格 (Ctrl-I)   \' 单引号   \" 双引号   \\ 反斜杠   特殊转义字符列表url转义字符  web 开发中通问好(?)方式在浏览器地址栏中传值时。浏览器是通过“&”来区分问号后的参数个数的 。 如果出现传值参数中带有“&”时,在接受页面就会出现错误,类似如下请求路径:/next.jsp?param1=hendhs89&furej & param2=sss   参数param1中含有转义字符“&” ,这样会导致被请求页的参数接收错误。   在传值前 通过 java.net.URLEncoder.encode(param1) 编码处理后,可将转义字符转为16进制;   1. + URL 中+号表示空格 %2B   2. 空格 URL中的空格可以用+号或者编码 %20   3. / 分隔目录和子目录 %2F   4. ? 分隔实际的 URL 和参数 %3F   5. % 指定特殊字符 %25   6. # 表示书签 %23   7. & URL 中指定的参数间的分隔符 %26   8. = URL 中指定参数的值 %3D 词条图册更多图册 扩展阅读: 1
http://zhidao.baidu.com/question/17416425.html?fr=qrl
开放分类: html,C++,c语言,程序语言,c# 我来完善 “转义字符”相关词条:
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Old 04-09-2011, 10:16 AM   #2
g4qyu6yf
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on her husband to get up: get up, get up, do not you get up early today to meet Well said.

wife: Do not talk, I go to sleep.

Husband: fast from it, to should not be late.

Wife: You do not touch me! I want to sleep! !

wife: Yeah! Are the late! How did you call me! ! !





on his wife to eat: I eat the plum in half, very good to eat, you eat the rest.

Husband: I do not like plum.

Wife: No, you love to eat! You are not eaten anything against me,new balance mens!

Husband: This fish is very good to eat,new balance outlet, come.

Wife: You dirty chopsticks touched, who eat!

husband: What do you eat I eat half, I do not hold anything against you, how do you hold anything against me?

wife: you are right. I hold anything against you that I am better than you clean. I'm clean, how can you than you hold anything against me? !





divorce his wife: If we divorced,new new balance shoes, the house belongs to me, my money I have to take.

Husband: What about my money?

Wife: Your money is my money, what is your money!

wife: Also, your monthly income after divorce have to give me 80%. Ah, if you marry again, then I became 60%.

husband: my wife, I will not divorce you!





on housework and her husband: We divide the job into home.

wife: good. First of all, men do it too dirty work,new balance 574, such as grazing, brush the toilet, wipe the table ... ...

husband: this right.

Wife: You studied engineering in school, and I was learning the arts, and live with your kid things, like washing machines, refrigerators, rice cookers, electric irons ... ...

husband: this ... ... OK,Professional Fitness Training - Qzone log!

wife: men outside, women inside. And dealing with outsiders you do it live,The 100 should be blurted out in English - Qzone log, buy groceries, utility bills, take the newspaper milk ... ...

Husband: OK, OK, then what are you doing?

Wife: Do not worry ah. So much smoke in the kitchen, can destroy the skin, and cooking with your kid.

Husband: You tell me you do it.

wife: I have a lot to dry Yeah. I can be with you, monitoring you, praise you, comfort you ... ... be good





wife about the child: we want a child.

Husband: OK.

Wife: Do you like our children?

Husband: Yes.

Wife: No! You have a person like me!

Husband: Well, well, for a person like you.

Wife: That my child how can you not like ah!

husband: we still do not have to children.





wife on the water: her husband, I want to drink!

Husband: I'll keep on doing.

Husband: hey, this cup is not in your hand Well, did not see?

wife: Yes, I just want you to me.





on the leadership of his wife: I am not a leader on the outside, at home and have to be leaders. You're out is to lead, must be led at home.

Husband: What if I do not succeed in leading the outside it?

wife: a man, Man on the outside face, home to come and collect his wife Shua Weifeng,- [] О `., What kind of man! You .....





wife on the bed: we cover the double was it.

Husband: Do not! That the next morning to all wrapped on you. I did cover none. Or build your own bar, and my heart at ease.

Wife: Well, you are yourself cover, until tomorrow morning I still have to be wrapped to go!





on the center of his wife: I have been in our family center in your home but also to me as the center.

husband: I have been in our family center.

wife: you can be my center of that center than important.

Husband: Why?

Wife: Because I am a daughter, you're just a kid.





wife on the phone: Why do not you call me? !

Husband: falsely accuse! Today is not that a good thing you give me a call. Finally, I waited a day, or I'll call you.

wife: I have said,new balance shoes, may I changed my mind. Women have the privilege to change his mind.

husband: Do you change your mind did not tell me it!

wife: I said, my heart said, Who told you and my heart is not shared, and looking to play





on the opposite ###### Wife: I have a boyfriend, you can not interfere with me.

Husband: OK, I have a girlfriend.

Wife: No!

Husband: Why Yes I know I not.

wife: I am a boyfriend, you can not do the others can do, I will not pick your old problems, and is conducive to a happy family. Your girlfriend, I am acting by a small, jealous quarrel with you, is not conducive to family stability.

husband: I have acting by little.

wife: a man, and woman as acting by a small, loss of nerve to say you!





take things on his wife: the bag you carry it with me.

Husband: I took four bags, and you get nothing, the nerve it?

wife: I was holding it for you! 100 kilos you do, I will get something better than what you get heavier.
Husband: I take `!!!!!!!





wife on a walk: Let Walking to the piece of road it has been.

Husband: too far to get there, now that we can not go back.

Wife: OK, you back I'm back.

husband:




about the affair his wife: now play the old TV affair, you say, you have an affair it?

Husband: no.

Wife: Why?

husband: Do you have a regret I had enough, never again to be the second!
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