Sender: Spirit Fairy Rain, Soul of Rain, It’s a Cool Day, What a Monster, Message Area: ANSI Title: Chapter 2 Class B Homework Sending site: Sun and Moon Guanghua Friday, February 2, 2007 20:42:11, site mail Class assignments are recommended to be completed by moderator students or interested students. 3. Simplify the following code and submit it in writing. Submit the simplified code and display effect. *[1m*[4m*[5m*[33;45;31mA*[0m*[44;45;32mB*[0m*[42;32mC*[0m The correct answer is Code *[1;4;5;31;45mA*[0;45;32mB*[42mC*[m Effect ABC Everyone’s answers to this question are varied@@..Only three students really got it right. If not I am very familiar with the ANSI display method and it is basically impossible to get it right. Let’s talk about the main issues For the optimization of A, just merge several items ending in m. Basically, there will be no problem. For the optimization of B, some students wrote *[0m*[45;32m or *[m*[45;32m In fact, those that also end with *[?m can be merged, but there is one thing to note: *[0m*[45;32m Although it looks similar to *[m*[45;32m, the display effect is different. However, when simplifying the code, specific problems should be analyzed in detail. For the optimization of C, many students use *[0m to restore the original state. In fact, it is not necessary. Because the foreground colors of B and C are the same, and B is not highlighted, you just need to change the background color. So when do you need to use *[0m to restore the display? Usually the current character is highlighted. Underline flashes and we use this character when the next character does not need these characteristics. Another situation is to reduce the code. If you need to change the foreground and background color at the same time to *[0;40;37m When we use *[0m instead of *[40;37m, we need to pay attention to the issue of high and low brightness. Don’t be discouraged if you don’t do well in this assignment. In fact, everyone has some problems to one degree or another. Only three students from daviddvd change NSgan did it completely right. If you practice more, you will be able to do it well: Regarding the significance of code standards, I won’t list everyone’s homework. Everyone has a certain understanding. I'm just here to talk about my views Code standardization is divided into two parts. One is simplification and the other is standardization. Simplification is standardization. A part of normalization. Because normalization can only be done manually, works that remove useless code The workload of simplification is relatively small. The benefit of standardization is the display effect of works under different terms. The same, this ensures the best display effect of ANSI works and the readability of standardized code. Strong This brings convenience to manual modification Pay attention to what is standard code 1. There is no waste code. Use ";" to write the same settings. 1.1 There are no more attribute settings than *[41;43m, which should be replaced by *[43m 1.2 Do not set the same attribute repeatedly. For example, *[33mA*[33mB should be replaced by *[33mAB 1.3 The foreground setting of adjacent spaces is ignored. If A*[31m *[33mB, replace it with A*[33m B 2. Set high and low brightness at the beginning of the row Using the default display method will cause differences in highlighting effects. If the first line is If a character is a low-brightness character, it should also be set with *[0m 3. Use *[m at the end of each line Why is it *[m at the end instead of *[0m? *[0m is to restore all special states *[1m *[4m *[5m and *[7m later Display in low light mode *[m is to restore the above special state. Press the term default setting later. show Use *[0m then the low light effect will affect the next line. This is in ANSI works Turning pages will cause differences in display effects. 4. Use *[0m in the line and less *[m After using *[m, you need to pay attention to whether the high and low brightness effects are set correctly. 5. When a line of code exceeds 255, try to streamline the code and use less shifting. Although shifting can perfectly express the work, many novices cannot copy it correctly. If it is really impossible to streamline your work, you can consider revising it. If If you copy someone else's work, you can only consider shifting it: By the way, the code copied directly by AnsiEditor ends with *[0m When you want to remove useless code from a work, the trickier way is to copy it to AE first. Then copy it to yaae that comes with Fterm. This code will be more streamlined and standardized: Here’s a list of everyone’s homework 1.*[1;4;5;45;31mA*[0;45;32mB*[0;42;32mC*[0m There are 10 people who answered this question, and only two of them used *[m instead of *[0m at the end. 2.*[1;4;5;45;31mA*[0m*[45;32mB*[0m*[42;32mC*[0m *[1;4;5;45;31mA*[m*[45;32mB*[m*[42;32mC*[m There are 9 students who answered this question, six in the first category and three in the second category. 3.*[1;4;5;45;31mA*[0m*[45;32mB*[42;32mC*[0m *[1;4;5;45;31mA*[0;45;32mB*[42;32mC*[0m There are four classmates here 4.*[1;4;5;45;31mA*[0m*[45;32mB*[42mC*[0m *[1;4;5;31;45mA*[m*[32;45mB*[42mC*[m This is closer to the standard answer. Only two students There are some small problems with the homework of the following students: Redleaves *[1;4;5;33;45;31mA*[m*[45;32mB[m*[42;32mC*[m Of these two, only the second one works. The first one should be removed. fifiisgenius *[1;4;5;33;45;31mA*[44;45;32mB*[42;32mC*[m One of these two should also be removed. every *[1;4;5;31mA*[0;32mBC*[m This is completely wrong happyif *[1;4;5;45;31mA*[0m*[45;32mB*[0m*[42m *[0m This guy ignored the last C. In fact, the same color in the foreground and background is often used to hide signatures. You can’t see it but it’s needed rabitzhang *[4m*[5;1;45;31mA*[0;45;32mB*[42;32mC*[m *[4m can be merged with the following ones Source: Sun and Moon Guanghua bbs.fudan.edu.cn [FROM: 218.83.252.199]