Matlab code mean?

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y=x(1)*x(1)+x(2)*x(2)
Y=x (1) +x the square of (2) square
Y = (x (1) +x (2) square of the

When was C++ invented

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United States AT&T GUNI·sitelaositelupu of Bell Labs (Bjarne Stroustrup) doctor in the early 1980 of the 20th century invention and realization of C++ (originally the language is called “c with Classes”).
Beginning C++ is to appear as an enhanced version of the c language, starting from the add class to the c language, constantly adding new features. Virtual functions (virtual function), operator overloading (operator overloading), multiple inheritance (multiple inheritance), template (template), exception (exception), RTTI, namespace (name space), gradually joined the standards.
In 1998 the international standards organization (ISO) international standard ISO/IEC 1988-1998 of adoption of C++ programming language. C++ is a programming language with international standards, often referred to as ANSI/ISOC++.

Ball-a single-chip microcomputer temperature control and alarm system of the program!

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Open both files
Attachment: 18b20.c

RT
Found on the Internet a few seemingly no sound with which God help me
Each modeling teaching and ProE ProE crankshaft connecting rod modeling teaching two sections

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Internal combustion engine crank-connecting rod mechanism based on Pro/E virtual Assembly and motion simulation

Part structure and cooperation is the basis for virtual Assembly. Mainly includes the cylinder and the crankcase engine crank, piston, piston pins, connecting rods, crankshafts, and other parts.
In the piston in the cylinder, which trace a clearance fit with the cylinder (diesel (0.0013-0.0027) d. Gasoline engine 0.0005D,m cylinder diameter), to ensure that the reciprocating motion of the piston in the cylinder; 3-4 piston ring fault to the load on the piston ring groove (cast iron piston piston ring gaps to 0.003D; 0.0025D aluminum piston piston ring gap), rings and grooves for a clearance fit (backlash (2.5-3.0)%b,b–
Piston ring of axis to thickness, back gap about (0.15-0.25) mm), normal Xia piston ring diameter slightly is greater than cylinder diameter, to guarantee Assembly Hou its round close cylinder wall, work process in the ring in with piston reciprocating movement of while, also can in ring slot within for trace of turns; piston pin connection piston and connecting rod head, PIN and connecting rod head clearance tie (clearance about (0.025-0.048) mm), PIN and piston pin seat hole most used full floating type connection, is cold state Xia for transition tie, Trace a clearance fit with a hot, piston pin in engine operation, not only within the small end of connecting rod bushing holes, you can also pin hole slowly turning; split connecting rod big end of connecting rod caps by bolt on the crank pin.

Found on the Internet, hope useful to your

C8051F310 core-and 10 single-chip JTAG debugging method of the sockets, study for a long time did not study out of sth Help you God, and circuit diagram!!!!

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Xinhua Dragon this is an example of a CD. Contact me if you need the entire circuit can

Reference: Xinhua long screen.width*0.35) this.width=screen.width*0.40 “>

I was a student, now a sophomore, clinical medicine, ordinary learning is very hard, love medicine. Also love computers, but not a computer professional and select the medical profession. However, there is no difference, like medicine. But the computer will fall.
A really, really likes computers. May not select a computer professional is also a wise choice, if engaged in computer science, it also had to face the pressure of exams, learn some things I don’t like to deal with test sth , The interest will be weakened.
Usually in addition to serious reading, outside playground exercises, other things have less each week for taking the time to research a bit about computers.
From junior high school to the present, on the computer, learning a lot of things. But not go through professional guidance, their trial, very complex, very messy, everything, nothing will. Their main learned some things:
Application software: Photoshop Flash Dreamweaver
Programming: c, VB ASP
Other: sth
They do not like to play games, they do not like to chat. All in all, is something like a little research on some of the more professional. Now, they are using spare time data structures and computer graphics, data structures can be, but some algorithms of logic have been puzzled, and computer graphics feel very rare. But their remains are very like.
Said so much, is hoping to give me some advice, he said in that direction on the interests and hobbies of the computer.
Do not know right or wrong, I think that true computers are very powerful people are those people who write programs and algorithms. So their preferred theories, such as the algorithm. There are also hardware classes, particularly was interested in circuit structure of CPU or GPU (but don’t know).
Freshman course learn to be good, and disciplines of science and calculus and physics at the University of computer-linked, is also quite good. In addition, English is pretty good. However, learning circuits, and linear algebra, sth by confused ⊙﹏⊙ B Khan
Hope you can give me some advice. Advice to a true computer enthusiast. Any suggestions can be addressed to sth Thank you for sth
2012-04-25 raise a reward of 25 minutes

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As a computer enthusiast, I give you a little advice:

Select your interest!!!

This is very important. From your description, you are very confused in the early learning. I personally integrated, your learning content are as follows: graphic design (PS), programming languages (c/VB), network programming and Web development (Dreamweaver/ASP), animation (Flash), and so on, in fact, each category here, there are a myriad of small classes, development is also different.

If you just want to work easier to find, so these things have access to be able to use is sufficient, others specific to work it.

Now if want to study to master, so you can only discard others, there can be only one direction.

If you like programming, algorithms, theory, and personal advice to security sites, such as snow, non-safe. Virus and antivirus have been in the competition who algorithm better.

If you like hardware programming, then I’m afraid you need to learn to compile, industry programmers can do such development in the future, such as doing some robot programming (I’ll learn that, if you choose, you will find, you still have to start from 0) or industrial control (talent shortage)

You don’t like chatting, playing games, and in College, I suggest you learn some robots make knowledge, it’s not just making robot, it will lead you into a new world of combining theory and practice, let your c language and physical contact with, at the same time strengthen your ability. Related sites: Sky robot (preferred), others find it

Above recommendations.