The difference between full and half angles

What is full angle and half angle?

(1) Full-angle---refers to a character occupying two standard character positions.

The character of Chinese characters and the characters of the whole horn and the gb2312-80 of the GB are all full-width characters in the graphic symbols and special characters. General system commands do not use full-width characters, only full-width characters are used for text processing.

(2) Half-width---refers to a character occupying a standard character position.

The usual English letters, numeric keys, symbol keys are half the corner, half the display of the inside code is a byte. Within the system, the above three characters are processed as basic code, so users generally use half-width when they enter commands and parameters.

What is the difference between the full and the half-width? Under what circumstances are each used?

The Full-width occupies two bytes, and half the corner is a byte.

Half corner of the whole corner is mainly for punctuation, full-width punctuation for two bytes, half the corner of a byte, regardless of whether it is half-width or full-width, Chinese characters are still to occupy two bytes

Only Half-width punctuation is used in the source code of the program (excluding data inside the string)

Only half-width punctuation can be used on computers that do not support languages such as Chinese characters (in fact, there is no point in the concept of Half-width full-width)

At other times, it doesn't seem to be a very good way to tell the whole horn from the corner.

,.?'! ...... These are half horns.

，。？ ‘！ ...... These are all corners.

For most fonts, the full angle looks bigger than a half angle, but it's not the essential difference.

The whole corner is a Chinese punctuation. The half corner is in English.

The difference between full and half angles

The whole horn is the letter and the numeral and so on with the Chinese character occupies the equal width position the word

Half-width is the ASCII way of the characters, in the absence of the Chinese character input method to do the use of the letter number and characters are half the angle.

Examples are as follows: (keyboard input is the same, input method settings are different)

[Full Angle example] aabb1234@#$%^&*;,. ：

[Half Angle example] aabb1234@$%^&*;,.:

When the Chinese character input method appears, the alphanumeric characters entered by default are half corners. But punctuation is the default for the full angle (as shown below) can be changed by clicking the corresponding button on the input tool bar, the input method name to the left of the button is to change the Chinese and English input, the right circle and semicircle is to change the letter and the number of the whole horn half angle, Again to the right ".," or ". , "is used to change the Chinese and English setting of the punctuation mark, which is the full angle, the English punctuation is half the corner, and the rightmost keyboard icon is used to display the soft keyboard, you can enter some special characters or letters in other languages.

In the following figure, the first figure is the Chinese input method, half-width letters/digits, full-width punctuation marks; the second is the exact opposite.

About "all corners" and "Half corners":

Full-angle: Refers to the gb2312-80 ("Information exchange with Chinese character coded character set, Basic Set") in various symbols, such as a, B, C, 1, 2, 3, etc., should be interpreted as Chinese characters.

Half-width: Refers to the English file ASCII code in various symbols, such as a, B, C, 1, 2, 3, and so on.

In VFP commands and procedures, the command word can not be used in full angle, such as the screen command should be clear. So it should be in the state of closing Chinese characters, or even in the Chinese character input state, should also be in the Half-width State,

Input method status bar should be: In the state, should not be a state, can be shift+space switch.

About Chinese/English punctuation:

Chinese punctuation: such as:, "" "" "()? And so on, in VFP command can not be used, such as the definition of variable name "Cao Kaihui" assignment Statement command is:

English punctuation: such as:, "<> ()?" Wait

Name= "Cao Kaihui"

Cannot enter:

Name= "Cao Kaihui"

E-Novice charge: The difference of Chinese characters ' full angle and half angle

The characteristics of Chinese characters make us encounter two basic and very important concepts, that is, the full angle and half angle.

Image of the saying that in the use of English input method, the computer screen, an English character (such as "a") occupies the position, people call it "half Corner", and a Chinese character occupies the position is equal to two English characters, it is called "full angle."

In our daily use of the computer system, the initial input method generally defaults to the English input method, then nature will be in the Half-width state, whether the input letters, symbols or numbers, always occupy only one English character position. If you switch to the Chinese input method state, you will have the full angle half angle two choices, the Chinese character says that the two options have no effect on it, and that it always occupies the position of two English characters, but it is important to enter symbols, numbers, and English letters in this state, as shown here:

"QUAN"

"QUAN"

The former input selection is a half angle, the latter is full angle, the results of the two presented a large difference, in the selection of the whole corner, even if the letter, symbol, number of all without exception to be treated as Chinese characters, from a visual point of view, they also appear to be a lot of awkward.

Many people tend to overlook the switch between Half-width and full-width, so it is not surprising that they encounter some strange things, such as when we use the Internet often to enter a password or URL, if at this time in full state, can only because the system can not confirm the failure; and when sending emails, The email address is written in xxx@xxx.com, the full angle "@" form, not the specified half-width "@" form, and the result can only be that the message cannot be sent successfully. It should be emphasized that in most cases, the use of half-width input is required.

It seems that the role of the full and half corners can not be neglected, in the Chinese input state, their situation will be displayed in the Input method prompt bar, for example, in the intelligent ABC's prompt bar has the corresponding button for conversion, its shape is "half month" is the half angle, "Full Moon" is the whole angle, we can by the mouse clicks or the shortcut key shift+ Space to switch between the two what is full angle and half angle.