Name: 第0周 (Week 0)
Uploaded: 2021-01-14T05:28:36.000Z
Duration: 45 min 50 s
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>> DAVID J. MALAN: This is CS50, Harvard University's introduction

to the intellectual enterprises of computer science

Now if you are among those that every year are sitting here

with a bit of nerves in your mind, such that you don't think you belong here,

you think that most anyone sitting around you

knows far more than you, is indeed more comfortable than you at computer

science or computers more generally, realize

that 78% of the students who now take CS50 have no prior experience.

>> Indeed, there's 100 dots there on the display, 78 of which

are solid green, which means you, if you're among that demographic,

And if you are instead among the 22% of CS50 students who do indeed

have prior experience, whether in high school or some other program,

realize that you, too, will be challenged in the course.

>> Not only do we have different tracks for students less comfortable and more

comfortable alike in sections, we also have so-called hacker editions

of most problem sets that will challenge those students

with that additional experience to explore similar material

but from a more sophisticated perspective.

Well, ultimately, what's going to matter as you explore this field is not

so much where you end up relative to your classmates,

but where you yourself end up in week 12 versus where you begin here

Now computer science-- well, let's call it the science of computation--

where computation is really just a fancy way of saying, taking some input,

producing some output, and doing so by running algorithms,

sets of instructions for solving some problem on those inputs

in order to produce some output or solution in which you are interested.

>> So we recently had occasion to travel out

And she'd like to speak to you here on video

to testify to just how applicable even just a taste of computer

science at the introductory level can be.

Even if you don't go on to pursue computer science as a field,

or even engineering, or STEM more generally,

you'll see, in fact, how a certain course so influenced her life.

And she only just took it when she was a senior here at Harvard College.

And I took CS50 when I was a senior at Harvard in 1990.

I was actually a history and literature major.

>> And my junior summer, I realized that maybe I

wanted to learn something about computers.

It was hard, but it was the most amazing class I took.

>> It changed how I think about everything.

And when I graduated from Harvard in 1990, I went to Silicon Valley.

And I've been working in tech ever since.

DAVID J. MALAN: Now what Susan didn't mention in this video,

that it was actually in her garage that Google itself was

>> Now we also reached out to our friends at code.org, an organization that

over the past year has been getting people particularly

excited about computer science and programming, in particular.

But it's worth noting that programming is not computer science per se.

Rather programming is just a tool-- with which all of you

will be all too well familiar by semester's end--

such that you can apply not just to future courses in CS

but to whatever fields from whence you're coming, in humanities,

social sciences, natural science, or the like.

>> Indeed, allow a few other alumni and their colleagues

to speak to the applicability of the field that awaits.

>> BILL GATES: I was 13 when I first got access to a computer.

>> JACK DORSEY: My parents bought me a Macintosh in 1984

>> MARK ZUCKERBERG: I was in the sixth grade.

>> SPEAKER 1: I learned to code in college.

>> RUCHI SANGHVI: Freshman year, first semester, Intro to Computer Science.

>> BILL GATES: I wrote a program that played tic-tac-toe.

>> DREW HOUSTON: I think it was pretty humble beginnings.

I think the first program I wrote asked things like,

ELENA SILENOK: I first learned how to make a green circle

GABE NEWELL: The first time I actually had

>> MARK ZUCKERBERG: Learning how to program didn't start off

as wanting to learn all of computer science

or trying to master this discipline or anything like that.

It just started off because I wanted to do this one simple thing.

I wanted to make something that was fun for myself and my sisters.

And then basically just added a little bit to it.

And then when I needed to learn something new,

I looked it up, either in a book or on the internet,

>> DREW HOUSTON: It's really not unlike playing an instrument or something

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