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

1、cstring const int Size=15; char name1Size; char name2Size=C+owboyHowdy! Im name2name1;Well, name1, your name has strlen（name1） letters and is storednin an array of sizeof name1 bytes.Your initial is name10 . name23=0Here are the first 3 characters of my name: 4.3 instr1.cpp const int ArSize=20; char

2、 nameArSize; char dessertArSize;Enter your name:name;Enter your favorite dessert:dessert;I have some delicious dessert for you, name.n4.4 instr2.cpp cin.getline（name,ArSize）; cin.getline（dessert,ArSize）;4.5 instr3.cpp cin.get（name,ArSize）.get（）; cin.get（dessert,ArSize）.get（）;4.6 numstr.cppWhat year

3、was your house built? int year;year;What is its street address? char address80; cin.getline（address,80）;Year built:yearAddress:address char charr120; char charr220=jaguar string str1; string str2=pantherEnter a kind of feline:charr1;Enter another kind of feline:str1;Here are some felines:charr1charr

4、2str1str2The third letter in is charr22str224.8 strtype2.cpp string s1=penguin string s2,s3;You can assign one string object to another:s2=s1n s2=s1;s1:s1 , s2:s2You can assign a C-style string to a string object.ns2=buzzard s2=buzzardYou can concatenate string:s3=s1+s2n s3=s1+s2;s3:s3You can append

5、 string.n s1+=s2;s1+=s2 yields s1= s2+=for a days2+= for a day yields s2= 4.9 strtype3.cpp str1=str2; strcpy（charr1,charr2）; str1+= paste strcat（charr1, juice）; int len1=str1.size（）; int len2=strlen（charr1）;The string contains len1 characters.nlen2 characters.4.10 strtype4.cpp char charr20; string s

6、tr;Length of string in charr before input:strlen（charr）Length of string in str before input:str.size（）Enter a line of text: cin.getline（charr,20）;You entered charrEnter another line of text: getline（cin,str）;You entered:strLength of string in charr after inptu:Length of string in str after input:4.1

7、1 structur.cppstruct inflatable char name20; float volume; double price; inflatable guest=Glorious Gloria,1.88,29.99; inflatable pal=Audacious Arthur,3.12,32.99;Expand your guest list with guest.name; and pal.name !You can have both for $guest.price+pal.price4.12 assgn.cpp inflatable bouquet=sunflow

8、ers,0.20,12.49; inflatable choice;bouquet:bouquet.name for $bouquet.price choice=bouquet;choice:choice.namechoice.price4.13 arrstruc.cpp inflatable guests2= Bambi,0.5,21.99,Godzilla,2000,565.99 ;The guest guests0.nameguests1.namehave a combined volume of guests0.volume+guests1.volume cubic feetn4.14

9、 address.cpp int donuts=6; double cups=4.5;donuts value=donuts; and donuts address =&donutscups value=cups; and cups address =cups4.15 pointer.cpp int updates=6; int *p_updates; p_updates=&updates;Values:updates=updates,*p_updates=*p_updatesAddresses:,p_updates=p_updates *p_updates=*p_updates+1;Now

10、updates=4.16 init_ptr.cpp int higgens=5; int *pt=&higgens;Value of higgens=higgensAddress of higgens=Value of *pt=*ptValue of pt=pt4.17 use_new.cpp int nights=1001; int *pt=new int; *pt=1001;nights value=nights: location int value=location double *pd=new double; *pd=10000001.0;double value=*pdlocati

11、on:pdlocation of pionter pd:size of pt=sizeof（pt） size of *pt=sizeof（*pt）size of pd=sizeof（pd） size of *pd=sizeof（*pd）4.18 arraynew.cpp double *p3=new double 3; p30=0.2; p31=0.5; p32=0.8;p31 is p31 p3=p3+1;Now p30 is p30 and p31 is p3=p3-1; delete p3;4.19 addpnstr.cpp double wages3=10000.0,20000.0,3

12、0000.0; short stacks3=3,2,1; double *pw=wages; short *ps=&stacks0;pw=pw,*pw=*pw pw=pw+1;add 1 to the pw pointer:ps=ps,*ps=*ps ps=ps+1;add 1 to the ps pointer:access two element with array notationstacks0=stacks0,stacks1=stacks1access two element with pointer notation*stacks=*stacks,*（stacks+1）=*（sta

13、cks+1）sizeof（wages）=size of wages arraysizeof（pw）=size of pw pointer4.20 ptrstr.cpp char animal20=bear const char *bird=wren char *ps;animalandbirdEnter a kind of animal:animal; ps=animal;Before using strcpy（）: at （int *） animal（int *） ps ps=new charstrlen（animal）+1; strcpy（ps,animal）;After using strcpy（）:（int *）animalname,20）;Enter volume in cubic feet:（*ps）.volume;Enter price:$ps-price;Name:（*ps）.nameVolume:volumePrice;price delete ps;4.22 delete.cppusing namespace std;char *getname（void）; char *name; name=getname（）;（int *）name delete name;（int *