Just like this, the time had come to ten o'clock, and Ye Xuan also returned to the classroom where 'himself' was

Looking at that serious expression, for some reason, he suddenly felt so unreal

"It turns out that I used to work hard to ......"

At this time, the teacher was talking at length about software engineering

"Data Flow Diagram: DFD for short, it graphically expresses the logical function of the system, the logical flow direction of data in the system and the logical transformation process from the perspective of data transmission and processing, and is the main expression tool of structured system analysis method and a graphical method used to represent the software model"

"So let's talk about how to draw this picture today...... Precautions and ...... of practical training assignments"

The teacher's hair was curled back, and it looked very foreign...... But if you put it on the students, the evaluation will become sloppy

"Data Flow Diagram or Data Flow Diagram, abbreviated as DFD. Data flow diagram DFD is a graphical tool to describe the data flow in a system, which marks the logical input and logical output of a system, and the processing required to convert the logical input into logical output."

"Note that a data flow diagram is not a traditional flowchart or a block diagram, and the data flow is not a control flow. A data flow diagram describes a system from the perspective of data, while a block diagram describes the system from the perspective of the people who process the data.

The DFD shows what kind of information will be input and output from the system, how the data will move through the system, and where the data will be stored. It doesn't show information about the timing of the process, or whether the process will run sequentially or in parallel, unlike the traditional structured flowchart that focuses on the flow of control, or U... M... l Activity workflow diagram, which takes control flow and data flow as a unified model"

"Data flow diagram graphically depicts the movement and transformation process of data flow from input to output from the perspective of data transfer and processing"

Since drawing on the blackboard as an example, it takes a bit of time to teach, but the effect is also there, and the intuitive picture makes it easy for students to understand

Ye Xuan stood beside the teacher with his chest around his chest, and found that he could understand these things, and suddenly understood: "It seems that I have worked a lot on this field in my previous life...... So even though I'm in a memory (dream) right now...... Can you easily understand it?"

At this time, the bell of the end of class was remembered, and the teacher just thought about it, and had to tilt his head when he heard the voice: "End of class!"

The students below also had a cheerful smile on their faces, and they liked the punctuality of the teacher......

However, in Ye Xuan's opinion, there are other aspects in it

"Some people just don't want to hear it...... Some people just don't understand, and some people don't have much energy after so many classes in a row, so it's a good time to relax after class...... Can you call it a combination of work and rest?"

Ten minutes passed

The teacher began to continue the lecture

"Let's talk about what the data flow diagram should include........."

"The first is to indicate the data symbols in which the data exists, and these data symbols may also indicate the media in which the data is used"

"secondly, to indicate the processing symbols for the processing of the data, which may also indicate the functions of the machines used in the processing;

Streamline symbols that indicate the flow of data between several processes and/or data media"

"The other is a special symbol that makes it easy to read and write data flow diagrams. There should be data symbols before and after processing symbols, the data flow diagram starts and ends with data symbols, and there are two typical structures of data flow diagrams, one is the transformation structure, which describes the work can be represented as inputs, main processing, and outputs, in a linear state. The other is a transactional structure, in which the data flow graph is bundled, that is, a bundle of data flows in or out in parallel, and there may be several transactions that need to be processed at the same time."

Ye Xuan watched the teacher talking, and a trace of admiration rose in his heart

"Worthy of being a university teacher...... There is no wide range of knowledge...... And it also deserves this position...... But the more important thing should be the experience..."

............

At noon, the bell rang for the end of the last class, which meant that the students' busy morning study life could come to an end, and everyone slipped away quickly......

This is also a sad part of university life......

As the past two years have passed, small groups have already been formed, and although everyone is in the same classroom, there may be only a few people who really know each other

Of course, there are also some people who have a wide range of friends, not only acquaintances in other faculties, but also two grades lower......

"But it's obvious that I'm not this kind of person......" Ye Xuan thought about his previous life and sighed in his heart

"Let's go, let's eat"

"Right now, right away"

Ye Xuan watched a few belated students come to 'him', and the corners of his mouth twitched: "These guys are really on time...... Came after school......"

Out of the teaching building, the road is full of students, most of them are in the canteen, so it seems dense, if there are people with dense phobia to see this, they may get sick.........

"Why are there so many people......

I said speechlessly

"Alas...... Isn't it like this every day at noon?"

The man in the infrared glasses said after wiping his eyes with his clothes

"You wipe it with your clothes again, and you see your lenses, it's all ...... road."

"Small problem, don't panic..."

"So what do you say now...... Do you want to come back later?"

"I'll eat it later, I'll eat it now."

"But there are a lot of people now."

"Then let's go out to eat, it just so happens that we haven't been out for a long time"

"Go out, don't you have a class in the afternoon?"

"In the year of Sao Nian, a university that does not skip classes has no soul"

"Forehead ......"

"Don't hesitate, there are no classes in the afternoon, and you don't want to look at this for the first few weeks..."

"Shall I go back and put a book then?"

"Put a chicken! It's just two books, bring it to labor and management to help you get it, go out and rub it for a good meal!"

Ye Xuan looked at 'himself' who was pushed outside the school by several people, and smiled dumbly

"It would be nice if I could really come back here if my cultivation was successful...... Pity... I don't know if I have a chance in this life......"

.........

A few people walked for a while to a hot pot restaurant, ordered a red soup, and then began to brag

"Isn't it, brothers...... Eating hot pot at noon......"

"You know a skewer, you can eat anything in hot pot, and it's best to eat it at noon...... Those who say they eat at night are the biggest misconceptions about this."

"It's just... That's it."

"Okay...... You're all big brothers."

Soon, the store first served a dry pot

With a few "waves", several people took the dishes and chopsticks and began to move

Ye Xuan sniffed behind them, but there was no smell

"Alas...... It's really unreal......"

"The most annoying scene is alive, isn't it just to wash the dishes and chopsticks and then seal them with a layer of film, this is too much!"

They had eaten very well, and they were all hungry because they had gone through a morning of study (there was only one of them) and had walked a long way......

"Why are there so few...... I haven't even felt it yet," one of them said with a sigh of relief as he watched the pan being taken away, and then stood up and prepared to leave

"What are you doing?"

"Let's go, why are you still sitting here after you've eaten?"

Syllable!

"I'm afraid you're a fool! The hot pot hasn't come up yet, you take a closer look there......" The man in the red glasses pointed to the menu on the wall

Dry pot and hot pot, 58 one

"I see, I thought it was just a dry pot...... No wonder the portions are so small......"

"Sha Coin! Just now he said that he finally ate the hot pot one, and you forgot about it in a blink of an eye......"

"Forehead ......"

After a few more minutes, the shopkeeper brought up the soup base, turned on the fire, and the few people began to make dishes and take the vegetables

"Does anyone want to eat enoki mushrooms?"

"I, I want, take more"

"Don't worry, fellow travelers, I understand"

Soon, the table was full of the dishes that had been brought back, meat was the majority, vegetables second, and the rest were quail eggs and other strange things

"Is the beef down now?" asked a boy in a plaid shirt with a plate of beef

"It's all right... Now it's down."

Puff puff puff

The beef sinks to the base of the soup and floats up with the bubbles, circulating until someone picks it up, rolls it up in a dipping saucer, and then enters the waiting population for a long time, adding a sense of refreshment

Then a few people began to chat, and the men in red jackets boasted about their glorious achievements last night, but only they themselves knew what the truth was

"I'm knocking...... I said I forgot what I did last night, I forgot they told me to go out all night......

Ye Xuan's eyes changed slightly when he looked at 'himself', and he suddenly knew that it was him

"Say......" The man in red glasses put his arm around his shoulders and said in a deep tone: "Why didn't you come last night...... In vain, we will keep you a skewer ......"

"Uh... Am I not taking my sister with this...... I forgot about it..."

"Tut-tut...... There is no future with a sister."

"That's it, come and mess with my brother, girls are indispensable"

", I'm embarrassed to be a single dog, or come and follow me, and the monthly income of 10,000 yuan is easy"

Ye Xuan looked at a few people surrounding 'him' and shook his head: "This is college life...... Simple and plain but full of camaraderie, this is different from a classmate sitting in the classroom."

"Relationships are often the most reliable in small groups...... There are many reasons for this."

"But most of it is a matter of time"

"After all, we have lived in the same house for so long, so we can say that everyone has seen everything from each other"

"Maybe it's because of this loss of shame that everyone's relationship has pulled a lot of ......"

"After all, only those close to you will see your truest side......"

"Hmm, this feeling ......" Ye Xuan thought about it, and suddenly felt that his body had condensed a lot, and he was shocked

He took a closer look at his body and repeatedly confirmed that he was not wrong, even sensing some of the cold temperatures of this winter......

"What's going on? Could it be that dreams are going to be real?" or ......"

Suddenly, Ye Xuan thought of a possibility, his eyes widened, full of disbelief: "Or maybe I'm going to be assimilated by it!!"

"Indescribable, unimaginable!!"

"This is obviously my dream!"

"Could it be that I'm going to be trapped to death by myself?"

"Isn't that a big joke!!"

Ye Xuan, who was in mood swings, slapped his virtual hand downward, and the ground was slightly sunken in, but this did not make him angry, but even more flustered: "I have to wake up quickly...... Otherwise, I will be trapped here all the time, and the physical body of the spirit world will not last long."

"Whew~ I've eaten this meal" A person patted his bulging stomach and said a little tiredly

"Ouch... No way... A little sleepy, go back to sleep......"

"Yes, yes, yes...... Me too, why don't you come and get me a little bit."