学业指导中心学习2014.6-c题库2007b试卷

浙江大学2006-2007学年夏季学开课学院：计算机学院 考试形式：闭考试时间：2007年7月7日,所需时间：120分钟，任课教师考生： (注意：答题内容必须写在答题卷上，写在本试题卷上无效Section1:SingleChoice（2marksforeachitem,total20Inthefollowings, isthecorrectcharacter Accordingtothedeclaration:floatx=3;thevalue expressionx=(int)x/2*2is Inthefollowingoperators, hasthemosthighlevelofprecedence. Toexpresswhetherthecharactervariablechisuppercaseletter, isthecorrect Thefollowingprogramfragmentwillprintout intn=0;while(n++<=2); D．syntaxTheexpression!Eofthestatementwhile(!E);isequivalentto Inthefollowingstatements, can’tinitializethetwo-dimensionarrayacorrectly.A．inta[2][3]={0}; B．inta[][3]={{1,2},{0}};C．int D．intTojudgewhetherthecharacterstringaisthesameasb,thecorrectcodefragment if B．ifC．if D．ifGiventhefollowingdeclaritions:inta=10,b=20,*p1=&a,*p2=&b;asshowninfigure1.Ifwewanttogettheresultsasshowninfigure2,wemustchoosethecorrectassignmentstatement figure figure Accordingtothedeclaritionandstatement:inta[2][3],(*p)[3];p=a;thecorrectreferencetotheelementofarrayais Section2:Fillintheblanks（2marksforeachitem,total30Accordingtothedeclarations:intm=5;y=2;thevalueofthevariableyis aftercalculatingtheexpressiony+=y-=m*=y.Accordingtothedeclarations:inta=3,b=2,c=1;Thevalueofexpressiona>b>cis Accordingtothedeclarations:intx,y,z;Theexpressiontodescribe“twoofx,yandzarenegative”is Accordingtothedeclarations:inta=1,b=0;thevalueof ++a*--a==b?12%5:’x’ Wheninput2473<CR>fromkeyboard,thefollowingprogramwillprintout #include<stdio.h>void{intc;switch(c-‘2’)casecase1:case2:putchar(c+4);break;case3:putchar(c+3);default:putchar(c+2);break;}}Thefollowingprogramprintsout #include<stdio.h>intintf(int{staticintfor(;k<=m;k++)s++;returns;}voidmain({ints=1;printf("%d#%d#",s,}Accordingtothefunctiondeclarition:voidmain(intargc,char*argv[])inthefilelearn.c,runthecommand:learntheCprogramminglanguage,thevalueofexpression Thefollowingprogramfragmentprintsout charstr[]=”abc\0def\0ghi”,*p=str;Accordingtothedeclarations:inta[2][3]={2,4,6,8,10,12},*p=a;thevalueofexpression*(p+5)is Assumethatthetwo-dimensionarrayahasmcolumns,thenumberoftheelementsbeforea[i][j]is Thefollowingprogramfragmentprintsout swap(int*p1,int*p2){intp=p1;p1=p2;}inta=5,b=7;Theexpression istotestwhetherthe6thbitofcharactervariablechis1(Assumethatthemost-rightbitisthe1stbit).UsetypedeftodefineapointertypePAthatpointstoanone-dimensionarraywhichcontains10elementsoftypeint Forthefollowingrecursionfunctionf,thefunctioncallf(3)willreturn f(intn) return((n>0)?2*f(n-1)+f(n-2):- Forthefollowingdefinitions,thevalueofexpressionpn->b/n.a*++pn->b is struct{inta;int}}}Section3:Readeachofthefollowingprogramsandanswerquestions(５marksforeachitem,totalmarks:30)Theoutputofthefollowingprogramis #include<stdio.h>void{intintfor(i=0;i<10-n;i++){for(j=i+1;j<10-n;j++)if(a[j]==c){for(k=j;k<10-n;k++)}}for(i=0;i<(10-n);i++)}Theoutputofthefollowingprogramis #definePRIprintf#defineNL“\n”#defineD“%d”#defineD1DNL#defineD2DDNL#defineD3DDDNL#defineD4DDDDNL#defineS“%s”void{inta=1;b=2;c=3;d=4;Theoutputofthefollowingprogramis #include<stdio.h>char*c[]={"ENTER","NEW","POINT",char**cp[]={c+3,c+2,c+1,c};char***cpp=cp;{printf("%s#",**++cpp);printf("%s#",*--*++cpp);}Wheninput6<CR>fromkeyboard,theoutputofthefollowingprogramis #include<stdio.h>#includevoidfun(char*a,charb);voidmain(){chars[]=”97531”,c;}voidfun(char*a,char{}Theoutputofthefollowingprogramis #include<stdio.h>#defineNUM5voidp1(charv[]){intfor(i=1;i<NUM;for(j=i-1;j>=0&&v[j]<v[j+1];j--temp=v[j],v[j]=v[j+1],voidp2(charv1[],char{inti=0,while(i<NUM&&if(v1[i]>v2[j])putchar(v1[i++]); while(i<NUM)putchar(v1[i++]);while(j<NUM)}void{chars[2][5]={‘v’,’d’,’x’,’c’,’b’,’e’,’a’,’y’,’z’,’w’};}Therearethreetextfilesf1.txt,f2.txtandf3.txt,eachcontainsthefollowingcontents:filename ThereisanotherCsourcefileex12.cwiththefollowingcontents:#include<stdio.h>voidmain(intargc,char{FILEvoidsub(FILE*);inti=1;if((fp=fopen(argv[i++],“r”))==NULL){printf(“Cannotopenfile!\n”);}else}}voidsub(FILE{char}Aftercompilingandlinking,theexecutableprogramex12.execanbeobtained.RunthecommandlineundertheDOSprompt:ex12f1.txtf2.txtf3.txt,theoutputis Section4:Accordingtothespecification,completeeachprogram(2marksforeachblank,total:20marks)Thefollowingprogramchangesthepositiveintegernumberfromindecimaltoinhexadecimal.Fillintheblankstocompletetheprogram.#include<stdio.h>#include<string.h>voidmain(){inta,i;chars[20];voidc10_16(char*,int);printf(“Inputa:”);for(i=_(1)_;i>=0;i--)printf(“%c”,*(s+i));}c10_16(char*p,int{intj;{if(_(2)_)*p=j+’0’;else*p=j-10+’A’;_(3)}}Thefollowingprogramwillconstructalinkednodessequencewhichstorestheeverycharcterofaninputcharactersline(forexample:a,b,c,…,x,y,z)toeachnodeofthelistinreverseorder.Thatis,thecharacterinputatfirstistobestoredintothetailnodeofthechainlist(asshowninthefollowingfigure),andtobeoutputinreverseorderofinputcharacters.Thenfreeallthenodes.Fillintheblankstocompletetheprogram.ZYa…ZYa#include#definegetnode(type) _(4)_malloc(sizeof(type))voidmain(){struct{charstructnodecharc; (5){p=getnode(structnode);}{ (6) }}Thereisatextfile,whichcontainsanumber(lessthan100)ofpositivedecimalintegers一100个的十进制正整数).Writeacommand-lineprogramprog.ctoreadinthesenumbers,counttheaveragevalueofallevennumbers(偶数),andfindoutthenumber(s)whichsumofalldigitsofeachnumber(各位数字之和)isgreaterthan10,andstoretheseresultsaboveintotheothertextfile.Requirements:taketheinputandoutputfilenamesascommand-lineparameters.Iftheoutputfilenameisomited(省略),thedefaultoutputwillbethestandardterminal.Fillintheblanks.ForThecommand-lineproginfile.txtTheinputtextfileinfile.txtcontainsthefollo