C++ Primer Plus6 第4单元程序清单Word文件下载.docx

C++ Primer Plus6 第4单元程序清单Word文件下载.docx

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cstring>

constintSize=15;

charname1[Size];

charname2[Size]="

C++owboy"

Howdy!

I'

m"

name2<

!

whatisyourname?

\n"

cin>

>

name1;

Well,"

name1<

yournamehas"

strlen（name1）<

lettersandisstored\n"

inanarrayof"

sizeofname1<

bytes."

Yourinitialis"

name1[0]<

."

name2[3]='

\0'

Herearethefirst3charactersofmyname:

"

4.3instr1.cpp

constintArSize=20;

charname[ArSize];

chardessert[ArSize];

Enteryourname:

name;

Enteryourfavoritedessert:

dessert;

Ihavesomedelicious"

dessert<

foryou,"

name<

.\n"

4.4instr2.cpp

cin.getline（name,ArSize）;

cin.getline（dessert,ArSize）;

4.5instr3.cpp

cin.get（name,ArSize）.get（）;

cin.get（dessert,ArSize）.get（）;

4.6numstr.cpp

Whatyearwasyourhousebuilt?

intyear;

year;

Whatisitsstreetaddress?

charaddress[80];

cin.getline（address,80）;

Yearbuilt:

year<

Address:

address<

Done!

4.7strtype1.cpp

string>

charcharr1[20];

charcharr2[20]="

jaguar"

stringstr1;

stringstr2="

panther"

Enterakindoffeline:

charr1;

Enteranotherkindoffeline:

str1;

Herearesomefelines:

charr1<

charr2<

str1<

str2<

Thethirdletterin"

is"

charr2[2]<

str2[2]<

\

4.8strtype2.cpp

strings1="

penguin"

strings2,s3;

Youcanassignonestringobjecttoanother:

s2=s1\n"

s2=s1;

s1:

s1<

"

s2:

s2<

YoucanassignaC-stylestringtoastringobject.\n"

s2=\"

buzzard\"

s2="

buzzard"

Youcanconcatenatestring:

s3=s1+s2\n"

s3=s1+s2;

s3:

s3<

Youcanappendstring.\n"

s1+=s2;

s1+=s2yieldss1="

s2+="

foraday"

s2+=\"

foraday\"

yieldss2="

4.9strtype3.cpp

str1=str2;

strcpy（charr1,charr2）;

str1+="

paste"

strcat（charr1,"

juice"

）;

intlen1=str1.size（）;

intlen2=strlen（charr1）;

Thestring"

contains"

len1<

characters.\n"

len2<

characters."

4.10strtype4.cpp

charcharr[20];

stringstr;

Lengthofstringincharrbeforeinput:

strlen（charr）<

Lengthofstringinstrbeforeinput:

str.size（）<

Enteralineoftext:

cin.getline（charr,20）;

Youentered"

charr<

Enteranotherlineoftext:

getline（cin,str）;

Youentered:

str<

Lengthofstringincharrafterinptu:

Lengthofstringinstrafterinput:

4.11structur.cpp

structinflatable

charname[20];

floatvolume;

doubleprice;

};

inflatableguest={"

GloriousGloria"

1.88,29.99};

inflatablepal={"

AudaciousArthur"

3.12,32.99};

Expandyourguestlistwith"

guest.name;

and"

pal.name<

!

Youcanhavebothfor$"

guest.price+pal.price<

4.12assgn.cpp

inflatablebouquet={"

sunflowers"

0.20,12.49};

inflatablechoice;

bouquet:

bouquet.name<

for$"

bouquet.price<

choice=bouquet;

choice:

choice.name<

choice.price<

4.13arrstruc.cpp

inflatableguests[2]=

{

{"

Bambi"

0.5,21.99},

Godzilla"

2000,565.99}

};

Theguest"

guests[0].name<

guests[1].name<

haveacombinedvolumeof"

guests[0].volume+guests[1].volume<

cubicfeet\n"

4.14address.cpp

intdonuts=6;

doublecups=4.5;

donutsvalue="

donuts;

anddonutsaddress="

&

donuts<

cupsvalue="

cups;

andcupsaddress="

cups<

4.15pointer.cpp

intupdates=6;

int*p_updates;

p_updates=&

updates;

Values:

updates="

updates<

*p_updates="

*p_updates<

Addresses:

p_updates="

p_updates<

*p_updates=*p_updates+1;

Nowupdates="

4.16init_ptr.cpp

inthiggens=5;

int*pt=&

higgens;

Valueofhiggens="

higgens<

Addressofhiggens="

Valueof*pt="

*pt<

Valueofpt="

pt<

4.17use_new.cpp

intnights=1001;

int*pt=newint;

*pt=1001;

nightsvalue="

nights<

:

location"

intvalue="

location"

double*pd=newdouble;

*pd=10000001.0;

doublevalue="

*pd<

location:

pd<

locationofpionterpd:

sizeofpt="

sizeof（pt）<

sizeof*pt="

sizeof（*pt）<

sizeofpd="

sizeof（pd）<

sizeof*pd="

sizeof（*pd）<

4.18arraynew.cpp

double*p3=newdouble[3];

p3[0]=0.2;

p3[1]=0.5;

p3[2]=0.8;

p3[1]is"

p3[1]<

p3=p3+1;

Nowp3[0]is"

p3[0]<

andp3[1]is"

p3=p3-1;

delete[]p3;

4.19addpnstr.cpp

doublewages[3]={10000.0,20000.0,30000.0};

shortstacks[3]={3,2,1};

double*pw=wages;

short*ps=&

stacks[0];

pw="

pw<

*pw="

*pw<

pw=pw+1;

add1tothepwpointer:

ps="

ps<

*ps="

*ps<

ps=ps+1;

add1tothepspointer:

accesstwoelementwitharraynotation"

stacks[0]="

stacks[0]<

stacks[1]="

stacks[1]<

accesstwoelementwithpointernotation"

*stacks="

*stacks<

*（stacks+1）="

*（stacks+1）<

sizeof（wages）<

=sizeofwagesarray"

sizeof（pw）<

=sizeofpwpointer"

4.20ptrstr.cpp

charanimal[20]="

bear"

constchar*bird="

wren"

char*ps;

animal<

and"

bird<

Enterakindofanimal:

animal;

ps=animal;

Beforeusingstrcpy（）:

at"

（int*）animal<

（int*）ps<

ps=newchar[strlen（animal）+1];

strcpy（ps,animal）;

Afterusingstrcpy（）:

（int*）animal<

delete[]ps;

4.21newstrct.cpp

inflatable*ps=newinflatable;

Enternameofinflatableitem:

cin.get（ps->

name,20）;

Entervolumeincubicfeet:

（*ps）.volume;

Enterprice:

$"

ps->

price;

Name:

（*ps）.name<

Volume:

volume<

Price;

price<

deleteps;

4.22delete.cpp

usingnamespacestd;

char*getname（void）;

char*name;

name=getname（）;

（int*）name<

delete[]name;

（int*