C语言(双语)复习资料

C涪言（双语）复习资料（2013）

第1章C语言基础

1.int,char,float,doubleareallbasicdatatypesinClanguage.(对)

2.Providedthatthelengthofintis16bits,thenthevaluescopeofunsignedint

is:(B)

A.0~255B.0^65535C.-32768^32767D.-256~255

3.Thedeclarationis:

intk=0,a=0,b=0;

unsignedlongw=5;

doublex=l.42,y=0;

thentheincorrectexpressionisA__

A.y=x%3B.w+=-2C.x=w+5D.k*=a+b

4.InC,basicdatatypesareint,char,floatanddouble.

5.Supposedeclaration:chara='c';thenstatement:printf(u%d'\a);iswrong.(错)

6.Supposedeclaration:

inta;

floatx,y;

(hentheresultdatatypeofexpression:

x+a%3*(int)(x+y)%2/4isfloat.

7.Thedatatypeofexpression:18/4*sqrt(4.0)isfloat.(错)

8.Supposedeclaration:chara;thenexpression:ch='5+9'iscorrect.(错)

9.Incorrectstringconstantis:(A)

A.'abc'B.“1212”C.“0"D.“”

10.IfRateisasymbolconstant,wecanuseitasRatc++.(错)

11.Asvariablename,tmpvarandTmpVararesame.(to)

12.Keywordscanbeusedasvariablenames.(错)

13.Thefirstcharacterofvariablenamemustbealetteroraunderscore(_).(对)

14.Whichofthefollowingiserror?(A)

A.Keywordscanbeusedasvariablenames.

B.Wetendtouseshortnamesforlocalvariables,especiallyloopindices,andlongernames

forexternalvariables.

C.Uppercaseandlowercaselettersinvariablenamesaredistinct.

D.Thefirstcharacterofvariablenamemustbealetteroraunderscore(_).

15.Thestatement:intnI=n2=10;iscorrect.(错)

16.Thedeclaration:floatf=f+1.1;iscorrect.(错)

17.Whichofthefollowingistheillegalvariablenames?(D)

A.LadB.n_10C._567D.g#k

18.Supposedeclaration:charc=,\10r；thenthecountofcharacterinvariablecisA.(对)

19.Supposedeclaration:charc='\06r；thenthecountofcharacterinvariablecis」.(对)

20.Supposedeclaration:charc=,\n\thcnthecountofcharacterinvariablecis」iew-line.

（对）

说明：转义字符以'开头，\nnn必须是8进制数。'\102'可以视为一个字符。

2l.Theexpression"（x=y=w=0,y=5+w,x=y）"iswrong.。（错）

这是一个逗号运算符的题n,逗号运算符具有最低优先级，先计算，后取值。

22.Theresultofexpression:x=(i=4,j=16,k=32)is32.（对）

23.Theoperandofoperator++/-canbevariablesorconstants.（错）

说明：自增自减运算符只能用于变量不能用于常量。例i++，一k（对）3++-6（错）

24.The%operatorcannotbeappliedtoafloatordouble.（对）

(%是取余数的运算符，只能用在整型数中)

25.Commentshavenoeffecttotheperformanceofprogram.（对）

26.Clanguagehasnoinput/outputstatement,justinput/outputfunctionsinstead.(对)

27.InC,commentsmustbeginwith/*andendwith*/.(对)

28.ACprogram,whateveritssize,consistsoffunctionsandvariables.(对)

29.Anexpressionbecomesastatementwhenitisfollowedbya:.(对)

30.Valueoftheassignmentexpression:c=25is25(对)

31.sum=sum+3canbewrittenassum+=3(对)

第2章选择结构

1.(x<=y<=z)isClanguageexpressionforrelationshipxWyWz.(错)

2.Valueoftheexpression=,b,isfalse.(错)

3.(x<=y)&&(x<=z)isClanguageexpressionforrelationshipx<yWz.(对)

4.Whenais1andbis0,thevalueofa||bistrue.(对)

5.Thedeclarationis:

intx=2,y=4,z=5;

whichofthefollowingexpressionequalsto0?(D)

A.x&&yBx<=yCx||y+z&&y-zD!z

6.Inthefollowingoperators,whichonehasthelowestprecedence?(C)

A.*B.&&C.||D.=>

7.Theresultofexpression:3&&5||1%2is1.(对)

8.(ch>='A')&(ch<='Z,)can(ellyouwheathervariablechisuppercase.(错)(必须用“&&")

9.Whichonecanexpressx>y^zcorrectly?(A)

A.(x>=y)&&(y>=z)B.(x>=y)and(y>=z)C.x>=y>=zD.(x>=Y)&&(Y>=z)

10.Thecorrectexpressonfor1WxW10and100WxW200is(1v=xv=10)&&(10Qv=xv=200).

11.Supposedeclaration:w=1,x=2,y=3,z=4;thcnthevalueofvv>x?w:y>z?y:zis4.(对)

12.Afterrunningfollowingblockofprogram,valueofvariablemis(D)

intw=1,x=2,y=3,z=4,m;

m=(w<x)?w:x;in=(m<y)?rn:y;m=(m<z)?ni:z;

A.4B3C2D1

13.Supposethefollowingcodesegment:

intw=1,x=2,y=3,z=4,m;

m=(w<x)?w:x；/!m=1

m=(m<y)?m:y；Hm=1

m=(m<z)?m:z;//m=1

finally(hevalueofmis1.(对)

14.Thestatement:if(x=y)&&(x!=0)x+y;iscorrect.(错)

15.Thestatementif(x<y)x=y,elsex="y,isnotcorrect.(对)

16.Thestatementif(n)meansifnisnot0.(对)

17.Theresultofthefollowingprogramis(C)

main()

{inti=l,j=l,k=2;

if((j++||k++)&&i++)//短路运算致使k未运算k=2。

printf("%d,%d,%d\n",i,j,k);

)

A.1,1,2B2,2,1C2,2,2D2,2,3

18.Ifwcusethefollowingfourexpressionsascontrolexpressionforifstatement,whichonehas

differentmeaningstoothers?(D)

A.k%2B.k%2==1C.(k%2)!=0D.k%2==()〃前3项都是判别if⑴执行，

19.Clanguagerequestineinbededifstatement,theuseofelsemustbe与离它最近的上方的一

个if匹配。

19.Theswitchstatementisamulti-waydecision.(对)

20.Inthestatementswitch(cxprcssion),expressioncanbeanytype.(1普)

第3章循环结构

I.Thestatement:fbr(a=0,b=l,i=0;i<=200;i++)iscorrect.(对)

2.Theresultofthefollowingblockofprogramis:(D)

fbr(x=3;x<6;x++)

{

if(x%2!=0)

printff**%d,,,x);

else

printf^44##%d\n,,,x);

I

A.**3##4**5B##3**4##5C##3**4##5D**3##4**5

3.Writetheresultoffollowingprogram423)

main()

{

intcount;

count=2;

for(;count<=20;count+=3);/*count增量：5811141720*/

printf("%d",count);/*退出循环后，20+3*/

}

4.Supposecodesegment:

intk=10;

while(k=0)

k=k-l;

thentheloopwillexecute10times.(错)

说明：循环不执行，因为whi侬)语句执行时必须while(l).

5.Write(heresultoffollowingprogram:(_21)

main()

(

intnum=0;

while(nuin<=20)

num++;

printf("%d",num);}

说明：当num=21时退出循环，所以结果为21.

6.Indo-while,theloopisexecutedatlestonce.(对)

7.Theresultofthefollowingprogramis:(A)

inta=1,b=I;

do

{

a++;b—;

}while(b<0);

printf(tia=%d,b=%d\nv,a,b);

A.a=2,b=0Ba=1,b=1Ca=3,b=-lDa=2,b=l

说明：do-while()必须执行一次，所以a++为2,b一为0,while(b<0)条件不满足，退

出循环。

第4章函数

I.Whichofthefollowingfunctiondefinitionsiscorrect?(A)

A.doublefun(intx,inty)Bdoublefun(intx;inty)

C.doublefun(intx,y)Ddoublefun(intx,y;)

2.Whichofthefollowingsiatementsiscorrect?(A)

A.Cprogramsgenerallyconsistofmanysmallfunctions.

B.Functionsmaybedefinedwithinotherfunctions.

C.InCprogram,youhavetoputmain()functionbeforeallotherfunctions.

D.InC,afunctionhastobedefinedbeforeanyothercodecancallit.

3.Whenweusefunction,wehavetwomethodstopassvaluefromthecallingfunctiontothecalled

functionpassbyvalueandpassbyreference.(对)

4.InClanguage,somefunctionsneedsreturnnovalue,whichkeywordsisusedtodenote

this?(A)

A.voidB.intC.floatD.double

5.Whichoneistheresultofthefollowingprogram?(D)

voidfun(charc,intd)

(

c=c+1;〃c='a'+l(b)

d=d+l;〃d='A'+l(B)

printf("%c,%c,”,c,d);

main()

chara='A\b-a';

fun(b,a);

printf("%c,%c\n",a,b);〃a='A',b='a'〃单向传递a,b值未变

I

A.B,b,A,aB.B,a,B,aC.A,a,B,bD.b,B,A,a

第5章数组

1.Arrayinitialization:intgradcl5]={1,2,3,4}；Sothevalueofgrade15Jis5(错)

2.Whichofthefollowingsiringassignmentstatementsiscorrect?(B)

A.strings="abcde";B.staticchars[]={"abcde"|;

C.strs="abcde";Dchars="abcde^^;

3.Choosetheresultofthefollowingprogram:(B)

#include<stdio.h>

voidmain(void)

{

charc[]={,a,,V；c','d'；\O,},*P,c;

P_c=c;

c[2]=A0';

printf("%s",c);

)

A.aB.abC.abcD.abed

说明：

clO]cLIJcl2Jcl3]c14j

abcd\0

clOJ41]cl2JcL3]cl4]

ab\0d

说明：字符串输出%s时，遇到，\0'时，就视为字符串结束。

4.WritetheresultoffollowingDroeram:(hELLO!)

main()

(

chars[80],*sp="HELLO!”；

sp=strcpy(s,sp);

s[0]='h';

puts(sp);

)

5.TheresultofstrcmpC'STUDY'V^tudy")is0.(错)

说明：大写字母与小写字母ASCH值不一样。

第6章指针

1.Apointercontainstheaddressofavariable.(对)

2.Findtheoutputofthefollowingprogram(D)

point(char*p){p+=3;}〃指针移动到3(指向第3单元)

main()

{charbr4]={,a'；b,,'c','d,},*p=b;

point(p);printf("%c\n",*p);

)

A.aBbCcDd

3.Providedthat(hedeclarationis:

int*p,m=5,n;

whichofthefollowingstatementsiscorrect?(D)

A.p=&n;scanf("%d",&p);B.p=&n;scanf('、%d",*p);

C.scanf(lk%d'\&n);*p=n;D.p=&n;*p=m;

4.Providedthatthesizeof(int)equals4,thentheresultofthefollowingprogramis:(A)

#include“stdio.h"

structdate

{

intyear,month,day;

}today;

main()

(

prints"%d\n”,sizeofOoday));

)

A.12B.8C.10D.9

说明：在C++系统中，int的长度为4字节。

编程题

编程题：

I.Supposestring2[]={"computers"),writeagrogramtocopythecontentsofstring?tostring!.

参考程序：

#includc<stdio.h>

main()

|

staticcharstring2[]={"compulers"};

staticcharstring1[10];

inti=0;

while(string2[i]!=,\0,)

{stringl[i]=string2li];

i++；

stringl[i]='\O';

return;

I

2.Writeaprogramwhichcalculatesumofdiagonalofa3*3matrix.(矩阵对角线)

参考程序：

#include<stdio.h>main()

{inta[3][3],sum=O;

inti,j;

printf^uEnterdata:\n")；

for(i=0;i<3;i++)

for(j=0;j<3y++)

scanR"％d'',&a[i]U]);

for(i=0;i<3;i++)

suni=sum+a[i][i]；

prinm“sum=%5d\n”,sum);}

*3.Inputthreeintegernumbersa,bandcwithcomma(逗号)，thenoutputtheminascending

order(升序).

参考程序：

#include<stdio.h>

niain()

{intt,a,b,c;

printf("pleaseinput3numberswithcomma:");

scanf("%d,%d,%d",&a,&b,&c);

if(a>b)

{t=a;a=b;b=t;)

if(a>c)

{t=a;a=c;c=t;}

if(b>c)

{t=b;b=c;c=t;}

printf("\nTheresultofsortisasfollowing:");

prinlfC%d%d%d\nH,a,b,c);

return0;}

4.Inputacharacter,andtellwheatherthecharacterisaletter,digitoraspecialcharacter.

参考程序：

#include<stdio.h>

main()

{chare;

c=getchar();

if(c>=,a'&&c<='z,||c>='A'&&c<='Z,)

printf("%cisaletter\n",c);

elseif(c>='0'&&c<=9,)

printf("%cisadigit\n",c);

else

printf("%cisaspicialcharacter\n'\c);}

*5.Programmingtogettheresultoftheexpressionas:1+2+3+.......+100.

参考程序：

#include<stdio.h>

intmain()

{intk;

intsum;

k=l;

sum=0;

for(k=l;k<=100;k++)

sum=suni+k;

printf("%d\n'\sum);

return0;}

*6.Writeaprogramthatpromptstheuserforanumberandthenprintsmessagetellingwhether

thedi