CS31-1 ucla

8/9/2019 CS31-1 ucla

http://slidepdf.com/reader/full/cs31-1-ucla 1/81

CS 31: Introduction To CS ITopic 1: Introduction to Programming

©9/2010 John A. Rohr All Right R!!r"!d

JAR 1#1

CS 31:

Introduction toComput!r Sci!nc! I

Topic 1

Introduction to

Programming

8/9/2019 CS31-1 ucla




JAR 1#2

Introduction to Programming

PR$%RA&&I'%

PR$C(SS()A&P*(

+ri"ing a Car

8/9/2019 CS31-1 ucla




JAR 1#3


Programming Proc! (,ampl!

T-p! o Contol S!u!ntial: St!p#-#t!p

S!l!ction: $n! o choic! R!p!tition: R!p!at!d t!p

8/9/2019 CS31-1 ucla




JAR 1#

Program Control lo

S!u!ntial

$n! St!p at a Tim!

4!gin (ndComput! Comput! Comput! Comput!

8/9/2019 CS31-1 ucla




JAR 1#5

Program Control lo

S!l!ction

$n! o Choic!

Comput!

Comput!Condition 4!gin (nd

8/9/2019 CS31-1 ucla




JAR 1#6

Program Control lo

R!p!tition

R!p!at!d St!p

4!gin (ndConditionInitiali7! Comput! 8pdat!

8/9/2019 CS31-1 ucla




JAR 1#

Program Control lo

Compoition

R!plac! an- S!u!ntial St!p

ith

To or mor! S!u!ntial St!p

a S!l!ction or a R!p!tition

8/9/2019 CS31-1 ucla




JAR 1#;

Program Control lo

Compoition

(,ampl!

%u! a 'um!r 4!t!!n 0 and 100

8/9/2019 CS31-1 ucla


8/9/2019 CS31-1 ucla




JAR 1#10


Programming St!p

1. Sp!ciication: +!cription o th! Ta<

2. Anal-i: 8nd!rtanding th! Ta<

3. T!t +ata: Compl!t! S!t o T!t

. +!ign: +ata and Algorithm

5. Impl!m!nt: =rit! th! Program

6. T!t and +!ug: &a<! It =or<

8/9/2019 CS31-1 ucla




JAR 1#11

Algorithm +!ign

Tool

lo Chart

P!udocod!

8/9/2019 CS31-1 ucla




JAR 1#12

Algorithm +!ign

lo Chart

%raphical S-mol

(a- to >iuali7! lo

+iicult to +ra in Comm!nt

(,ampl!: lo o Control +iagram

8/9/2019 CS31-1 ucla




JAR 1#13

Algorithm +!ign

lo Chart (,ampl!

%u! a 'um!r 4!t!!n 0 and 100

Set

G to 50G = N?

N

Y

Done:

G is N

G < N?N

Y

Add

C to G

Set

C to 25

Subtract

C from G

Divide

C by 2

Start

G is te current !uess

C is te current can!e

N is te cosen number

8/9/2019 CS31-1 ucla


8/9/2019 CS31-1 ucla




JAR 1#15

Algorithm +!ign

P!udocod! (,ampl!

%u! a 'um!r 4!t!!n 0 and 100

1. S!t th! gu! to 50. 2. S!t th! chang! to 25.

3. I th! gu! i th! num!r +$'(?

. I th! gu! i l! than th! num!radd th! chang! to th! gu!.

5. I th! gu! i gr!at!r than th! num!rutract th! chang! rom th! gu!

6. +i"id! th! chang! - 2.

. %o to St!p 3.

8/9/2019 CS31-1 ucla




JAR 1#16

Algorithm +!ign

P!udocod! (,ampl! // %!t th! input "alu!

// I th! input "alu! ar! not "alid// +ipla- an !rror m!ag!

// (l!

// or !ach input "alu!

// Calculat! th! r!ult

// +ipla- th! r!ult

8/9/2019 CS31-1 ucla




JAR 1#1

Programming 4aic

Programming Practic!

@ +!ign !or! impl!m!nting

@ 8! comm!nt li!rall-

@ +!"!lop and t!t incr!m!ntall-

@ R!u! unction

@ Start !arl-

8/9/2019 CS31-1 ucla




JAR 1#1;

Programming 4aic

*!arning to Program

Program

Program

Program

8/9/2019 CS31-1 ucla




JAR 1#19

Programming *anguag! *!"!l

&achin! ". uman

&achin! *anguag!

A!ml- *anguag!

igh#*!"!l *anguag!

'atural *anguag!

8/9/2019 CS31-1 ucla




JAR 1#20


&achin! *anguag!

@ *anguag! o th! Comput!r

@ Conit o 0B and 1B

@ &achin! +!p!nd!nt

@ *o!t *!"!l@ 'o *imit

8/9/2019 CS31-1 ucla




JAR 1#21


A!ml- *anguag!

@ Simplii!d Comput!r *anguag!

@ Conit o S-mol and $p!ration

@ &achin! +!p!nd!nt

@ S!cond *o!t *!"!l@ 'o *imit: Sam! a &achin! *anguag!

8/9/2019 CS31-1 ucla




JAR 1#22


igh#*!"!l *anguag!

@ &ath!matical *anguag!

@ Conit o &ath!matical Stat!m!nt

@ &achin! Ind!p!nd!nt &otl-D

@ igh!t *!"!l (,c!pt 'aturalD@ *imit!d Capailit-: 'ot All $p!ration

8/9/2019 CS31-1 ucla


CS 31: Introduction To CS ITopic 1: Introduction to Programming©9/2010 John A. Rohr All Right R!!r"!d

JAR 1#23


8!

@ &achin! *anguag!: +!ugging $nl-

@ A!ml- *anguag!: Critical Ta<

@ igh#*!"!l *anguag!: &ot Common

@ 'atural *anguag!: 'ot E!t

8/9/2019 CS31-1 ucla



©9/2010 John A. Rohr

All Right R!!r"!dJAR 1#2


(,ampl!@ igh#*!"!l: Sum F irt G S!condH

@ A!ml-: *$A+ irt A++ S!cond

ST$R( Sum

@ &achin!: 210A F 0010000100001010104 F 0010000100001011

310C F 0011000100001100

8/9/2019 CS31-1 ucla




All Right R!!r"!dJAR 1#25

Compilation Proc!

igh#*!"!l &achin!

1. (nt!r high#l!"!l program

2. Tranlat! to A!ml- *anguag!

3. Tranlat! to &achin! *anguag!

. Comin! ith *irar- unction

5. *oad into Comput!r

6. Run Program

8/9/2019 CS31-1 ucla



©9/2010 John A. Rohr All Right R!!r"!d JAR 1#26

Compilation Proc!

A!ml!r

Compil!r

*in<!r

*oad!r

Sourc!

il!

CGGil!

*irar-il!

$!ct

il!

$/Amil!

(,!cut!il!

&ain&!mor-

Am

$

8/9/2019 CS31-1 ucla




Compilation Proc!

8!r St!p

1. (nt!r high#l!"!l program ith !ditor

2. Compil! th! program

3. i, th! -ntactic !rror

. Run th! program

5. i, th! !mantic !rror

6. Compl!t! th! docum!ntation

8/9/2019 CS31-1 ucla



©9/2010 John A. Rohr All Right R!!r"!d JAR 1#2;

igh#*!"!l *anguag!

&an- T-p!

@ $RTRA': irt &ath!matical

@ C$4$*: (arl- (nglih#*i<!

@ *ISPS'$4$*: Sp!cial#Purpo!

@ A+A: +$+ Standard

@ C: $p!rating S-t!m Impl!m!ntation

@ CGG: $!ct#$ri!nt!d Programming

8/9/2019 CS31-1 ucla




igh#*!"!l *anguag!

C/CGG

@ C: In"!nt!d to Program 8'I) $. S.

%!n!ral Purpo!

@ CGG: (nhanc!m!nt o C

$!ct#$ri!nt!d Programming

*anguag! or thi Cour!

8/9/2019 CS31-1 ucla




unction and Program

unction

@ A ingl! unit o computation

Accomplih! on! thing

&a- u! oth!r unction

&a- produc! a r!ult

S!u!nc! o tat!m!nt

8/9/2019 CS31-1 ucla




unction and Program

Program

@ Impl!m!ntation o a compl!t! olution

Sol"! a p!cii!d prol!m

Includ! input and output

&a- u! unction

8/9/2019 CS31-1 ucla




CGG 4aic

K!-ord/Id!ntii!r

@ *!tt!r or L ollo!d - l!tt!r L M digit@ Ca! !niti"!@ 8nlimit!d l!ngth: Compil!r ma- u! 32

@ +onBt !gin ith L: 8!d - compil!r @ &ultipl! ord: Capitali7! or u! L @ Contant: Capitali7!

R!uir!m!nt

Con"!ntion

8/9/2019 CS31-1 ucla




CGG 4aic

K!-ord/Id!ntii!r@ Id!ntii!r: 'am! o data

@ K!-ord: Id!ntii!r r!!r"!d or p!ciic languag! u!

@ (,ampl!: , data1 m-'am! a123c

igL"arial! "123

@ In"alid: 37 )E 3 Na3

8/9/2019 CS31-1 ucla




CGG 4aic

+ata T-p!

@ Int!g!r: int

@ R!al: float *imit!d pr!ciion

double (,t!nd!d pr!ciion

@ Charact!r: char $n! charact!r onl-

@ *ogical: bool Tru! or al!

ardar!

Sotar!

8/9/2019 CS31-1 ucla




CGG 4aic

Int!g!r +ata

@ +icr!t! "alu!

@ Counting num!r

@ Poiti"! n!gati"! or 7!ro

@ >alu! p!cii!d - d!cimal digit

@ 'o d!cimal point

@ (,ampl!: 2 #;0 0 16

8/9/2019 CS31-1 ucla




CGG 4aic

R!al +ata

@ Continuou "alu!

@ Poiti"! n!gati"! or 7!ro

@ >alu! p!cii!d - d!cimal digit

@ $ptional d!cimal point

@ $ptional ci!ntiic notation

@ (,ampl!: 3.1 #25.; 0 123 #3.5!;

8/9/2019 CS31-1 ucla



©

9/2010 John A. Rohr All Right R!!r"!d JAR 1#3

CGG 4aic

4ool!an +ata

@ Tru! or al! onl-

@ true and false ar! <!-ord in CGG

@ 'o 4ool!an data t-p! in C

al! r!pr!!nt!d - 7!ro "alu!

Tru! r!pr!!nt!d - an- non7!ro "alu!

Tru! "alu! o on! g!n!rat!d - compil!r

8/9/2019 CS31-1 ucla



©

9/2010 John A. Rohr All Right R!!r"!d JAR 1#3;

CGG 4aic

Charact!r +ata

@ Singl! it!m o a charact!r !t

@ &achin!#d!p!nd!nt: 4a!d on hardar! ASCII/A'SI (4C+IC

8nicod!@ Charact!r ar! !nclo!d in ingl! uot!

@ (,ampl!: OAO O7O O3O OO O O OQO

8/9/2019 CS31-1 ucla



©


CGG 4aic

String +ata

@ !ro or mor! it!m o a charact!r !t

@ Can ! !mpt- 'o charact!rD

@ Can ! on! charact!r

@ Can ! multipl! charact!r

@ String ar! !nclo!d in doul! uot!

@ (,ampl!: A String AC?N21

8/9/2019 CS31-1 ucla



©


CGG 4aic

Charact!r ". String

@ Charact!r: 4uilt#in to CGG

char data t-p! Singl! charact!r onl- (nclo!d in ingl! uot!

@String: A"ailal! uing #include string string data t-p!

!ro or mor! charact!r (nclo!d in doul! uot!

8/9/2019 CS31-1 ucla


CS 31: Introduction To CS I

Topic 1: Introduction to Programming

©


CGG 4aic

Contant and >arial!@ (l!m!ntar- unit o inormation

@ Singl! data it!m@ 'am! i an id!ntii!r

@ T-p! i p!cii!d in d!claration

@ Contant i not chang!d onc! d!in!d

@ >arial! i !t - computation

8/9/2019 CS31-1 ucla




©


CGG 4aic

*it!ral@ Contant unit o inormation

@ Singl! data it!m@ Sp!ciic "alu!

@ Int!g!r: +!cimal num!rH 'o d!cimal point

@ loat: +!cimal num!rH =ith d!cimal point@ Charact!r: $n! charact!r o !t

8/9/2019 CS31-1 ucla




©


CGG 4aic

*it!ral (,ampl!@ Int!g!r: ;0

@ loat: ;.2 ;.2 ;.2(2 ;.2!2 @ +oul!: 16.2 1.62(1 1.62!1

@ *ong +l: ;.2* ;.2l ;.2(2* ;.2!2l

@ Charact!r: OO

@ String: String *it!ral

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#

CGG 4aic

(cap! S!u!nc!@ Charact!r ith p!cial m!aning

@Sp!cii!d in CGG ith pr!c!ding ac<lah@ *imit!d !t

n '!lin!

O Singl! Uuot!

+oul! Uuot!

4ac<lah

0 Charact!r String 'ullD T!rminator

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#5

CGG 4aic

+ata +!claration

@ &ut ! d!clar!d !or! u!

@ %i"! compil!r inormation aout th! data

'am!

T-p! Si7! 'ot or !l!m!ntar- data t-p!D

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#6

CGG 4aic

+ata +!claration (,ampl!

@ int iH

@ int ,1 ,2 acH@ loat 1 "olt po!rH@ doul! !ight "3 inpH

@ ool tat!H@ char ch l!tt!rH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#

CGG 4aic

+ata Initiali7ation

@ &ut ! initiali7!d !or! irt u!

@ To a- to initiali7!

+!claration

Aignm!nt

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#;

CGG 4aic

+ata Initiali7ation (,ampl!

@ int i F 0H

@ int ,1 F 3 ,2 F #5 ac F 3 5 G 9H@ loat 1 F 0 "olt F 120.5 po!r F 0.1H@ doul! !ight F 100 "3 F 0.03 inp F #2H

@ ool tat! F al!H@ char ch F OO l!tt!r F O)OH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#9

CGG 4aic

Arithm!tic $p!rator

@ 8nar- -nta,

op!rator $p!rand: #"alu!

@ 4inar- -nta,

$p!rand op!rator $p!rand: a G 5

@ Par!nth!!

num!rD

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#50

CGG 4aic

Arithm!tic $p!rator

@ G Addition

@ # Sutraction

@ &ultiplication

@ / +i"iion

@ V &odulu R!maind!r

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#51

CGG 4aic

+i"iion

@ To int!g!r op!rand Int!g!r r!ult

(,ampl!: 12 / 5 F 2@ To r!al op!rand R!al r!ult

(,ampl!: 12.0 / 5.0 F 2.

@ &i,!d op!rand R!al r!ult

(,ampl!: 12.0 / 5 F 2.

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#52

CGG 4aic

+ata i!rarch-

int/char loat

doul!

long doul!

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#53

CGG 4aic

Incr!m!nt and +!cr!m!nt

@ GG Pr!incr!m!nt/Potincr!m!nt

Pr!incr!m!nt: Incr!m!nt !or! u!

Potincr!m!nt: Incr!m!nt at!r u!

@ ## Pr!d!cr!m!nt/Potd!cr!m!nt

Potd!cr!m!nt: +!cr!m!nt !or! u!Potd!cr!m!nt: +!cr!m!nt at!r u!

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#5

CGG 4aic

(,pr!ion

@ $p!rand and op!rator

@ Arithm!tic calculation

@ T-p! con"!rion h!r! allo!d

Implicit: Automatic

(,plicit: Cat

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#55

CGG 4aic

(,pr!ion (,ampl!

@ "ar1

@ it!m1 5

@ a G cD

@ 0.5 a! h!ight

@ , p / m nD G tD

@ "ar F num / di"D di"

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#56

CGG 4aic

Automatic T-p! Con"!rion

@ Promotion: 'o lo o accurac-

(,ampl!: Int!g!r loat10 loat "arial! !com! 10.0

@ +!motion: &a- lo! accurac-

(,ampl!: loat Int!g!r 10.1 Int!g!r "arial! !com! 10

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#5

CGG 4aic

CGG Stat!m!nt

@ T!rminat!d - !micolon

@ $n! action Aignm!nt

Input/$utput

Control

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#5;

CGG 4aic

Aignm!nt Stat!m!nt

@ S!t th! "alu! o a "arial!

@ >arial! nam! id!ntii!rD on l!t id!

@ F op!rator

@ >alu! !,pr!ion on right

@ (,ampl!: "alu! F 1.23H

data F a! G 5H

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#59

CGG 4aic

Aignm!nt Stat!m!nt

@ $rd!r o !"aluation not guarant!!d

a G i th! am! a G a Prol!m: n G GGnD: A"oid thi u!

@ Shorthand notation or om! tat!m!nt

>arial! "alu! chang!d - G # / or V orm i "arial! GF !,pr!ionH

Sam! a "arial! F "arial! G !,pr!ionH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#60

CGG 4aic

Aignm!nt (,ampl!

@ an F actor1 actor2H

@ F "1 G "2 "3 G " / "5DH

@ d2 GF 16H

@ 7 F i7!1 a!H

@ a F PI rH

@ r VF dH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#61

CGG 4aic

4aic String $p!ration

@ +!claration: tring tring1H

tring tring2 tring3H

@ Initiali7ation: tring tring F A StringH

@ Aignm!nt: tring1 F H

tring2 F Anoth!r tringH

tring3 F tringH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#62

CGG 4aic

Conol! Input/$utput

@ 8! iotr!am lirar-

Ninclud! Wiotr!amX

uing nam!pac! tdH

@ Input: cin tr!am !,traction op!rator

@ $utput: cout tr!am in!rtion op!rator

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#63

CGG 4aic

Conol! Input: cin

@ R!ad "alu! rom <!-oard tdinD

@ >alu! !parat!d - hit! pac! Spac! ta or n!lin!

@ *in! !nd!d ith n!lin! Wr!turnXD

@ (,ampl! cin XX m-+ataH

cin XX irt>alu! XX !cond>alu!H

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#6

CGG 4aic

Conol! Input: cin

@ Input "alu! can ! on multipl! lin!

@ (ach input "arial! r!c!i"! on! it!m

@ (,ampl!

Singl! lin!: 29 3.15 #12.5Wr!turnX

&ultipl! lin!: 29 3.15Wr!turnX

#12.5Wr!turnX

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#65

CGG 4aic

Conol! Input: cin.ignor!D

@ &a- n!!d to ad"anc! to n!,t lin!

@ &ut <ip o"!r n!lin! at !nd o lin!

@ cin.ignor! pro"id! th! capailit-

@ S<ip up to 10000 charact!r to n!lin!

@ Stop on irt charact!r o n!,t lin!

cin.ignor!10000 OnODH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#66

CGG 4aic

Conol! $utput: cout

@ +ipla- "alu! on th! cr!!n tdoutD

@ String "alu! and !,pr!ion

@ &ultipl! it!m not !parat!d

@ (nd lin! ith \n or endl pr!!rr!dD

@ (,ampl!: cout WW (,ampl! WW !ndlH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#6

CGG 4aic

Conol! $utput: cout

@ 'um!r ormatting i automatic

@ Compil!r d!cid! hat ormat to u!

@ Can ! !,plicitl- controll!d: !.g. 123.5

cout.!tio::i,!dDH

cout.!tio::hopointDH

cout.pr!ciion2DH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#6;

CGG 4aic

Conol! $utput: cout

@ $utput lin! !nd!d !,plicitl-

@ 'o n! lin! unl! p!cii!d

@ $n! tat!m!nt: &ultipl! output lin!

cout WW a WW !ndl WW WW !ndlH

@ &ultipl! tat!m!nt: $n! output lin!

cout WW aH cout WW H cout WW WW !ndlH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#69

CGG 4aic

Conol! $utput: cout

@ 8! cout or t!,t prompt

cout WW (nt!r a "alu!: H cin XX m->alu!H

@ (nd inal output ith !nd o lin!

cout WW !ndlH

Put u!u!nt output on n!,t lin!

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#0

CGG 4aic

Conol! $utput: c!rr

@ Alt!rnat! output to cr!!n td!rrD

@ =or< li<! cout

@ Can ! r!dir!ct!d to di!r!nt il!

@ (,ampl!

c!rr WW (rror m!ag!? WW !ndlH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#1

CGG 4aic

Conol! I/$ (,ampl!

cout WW (nt!r data "alu!:H

cin XX "alu!H

cout WW Th! "alu! i

WW "alu!

WW !ndlH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#2

CGG 4aic

&or! String $p!ration

@ String l!ngth: tring.l!ngthD or tring.i7!D

@ Singl! charact!r !,traction: tringY0Z@ Sutring: tring.utrtartD@ Sutring: tring.utrtart countD

@ String output: cout WW tringH@ String input: cin XX tringH 1 =ordD@ String input: g!tlin!cin tringDH 1 *in!D

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#3

CGG 4aic

String $p!ration (,ampl!

@ tring t F +ata tringH

@ t.l!ngthD or t.i7!D i 11@ tY0Z i O+O@ tY6Z i Ot[@ tY11Z do! not !,it

@ t.utr3D i a tring\@ t.utr;2D i in\@ t.utr93D i ill!gal

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#

CGG 4aic

String Input

@ cin XX tringH

R!ad on! ord: 8p to hit! pac! Stop on hit! pac! charact!r

@ g!tlin!cin tringDH

R!ad on! compl!t! lin! Stop on irt charact!r o n!,t lin!

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#5

CGG 4aic

String Input (,ampl!

@ Input lin!: Thi i om! t!,t

@ tring t1 t2 t3H@ g!tlin!cin t1D put

Thi i om! t!,t in t1 and top at th! tart o th! n!,t lin!

@ cin XX t2H cin XX t3H put Thi in t2 and i in t3 and top at th! pac! at!r i

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#6

CGG 4aic

*irari!

@ Pro"id! uilt#in capailiti!

@ Includ!d - pr!proc!or @ &ad! a"ailal! ith #include tat!m!nt

@ (,ampl!

Ninclud! Wiotr!amX Str!am input/output Ninclud! WtringX String

Ninclud! WctliX!,it rand and oth!r

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#

CGG 4aic

'am!pac!

@ Pro"id! lat nam! or id!ntii!r

@ R!ol"! nam! conlict ith lirari!

@ Standard lirari! u! std

@ 'am!pac! nam! p!cii!d ith using

(,ampl!: uing nam!pac! tdH

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#;

CGG 4aic

Comm!nt

@ To t-p! can ! int!rmi,!d

@ Singl! lin! comm!nt pr!!rr!dD 4!gin ith //

(nd at !nd o lin!

@ &ultipl! lin! comm!nt alt!rnat!D 4!gin ith /

(nd ith /

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#9

CGG 4aic

Comm!nt (,ampl!

@ // Thi i a ingl!#lin! comm!nt

@ , F 1H // Thi i a partial#lin! comm!nt@ /

Thi i a mulitpl!#lin! comm!nt

Th!r! can ! man- lin! Thi i th! lat lin! o th! comm!nt

/

C 4 i

8/9/2019 CS31-1 ucla





All Right R!!r"!d

JAR 1#;0

CGG 4aic

Programming St-l!

@ =rit! und!rtandal! cod!

@ 8! m!aningul data nam!

@ 8! nam! or contant

@ 8! comm!nt li!rall-

@ Prot!ct againt u!r !rror

8P+AT(S

8/9/2019 CS31-1 ucla


8P+AT(S

Contant M >arial! (,ampl!&or! (,ampl! Program

Documents

CS31-1 ucla