全國計算機(jī)等級考試二級教程C語言程序設(shè)計課后習(xí)題

全國計算機(jī)等級考試二級教程C語言程序設(shè)計課后習(xí)題全國計算機(jī)等級考試二級教程C語言程序設(shè)計課后習(xí)題全國計算機(jī)等級考試二級教程C語言程序設(shè)計課后習(xí)題《全國計算機(jī)等級考試二級教程--C語言程序設(shè)計》課后習(xí)題答案第一章1.1EXE1.2COBJEXE1.3次序選擇循環(huán)第二章一.選擇題2.1B2.2D2.3B2.4A2.5C2.6A2.7B2.8B2.9D2.10C2.11B2.12B2.13A二.填空題2.14112.16{}定義履行語句2.17重點字用戶表記符2.18intfloatdouble2.19floata1=1;floata2=1;2.20儲藏單元2(a*b)/ca*b/ca/c*b2.23把常量10賦給變量s2.24位1或02.2581270111111-128100000002.2710816三.上機(jī)改錯題2.28#include"stdio.h";

刪除行尾的

";"main( );/*mainfunction*/

刪除")"后的";",

說明中的

*重要靠“

/”,即應(yīng)為“

/*”和“*/”函數(shù)開始處扔掉了一個“{”floatr,s;/*/*risradius*/,/*sisareaofcircuilar*/*/r=5.0;

說明符號不可以嵌套使用s=3.14159*r*r;printf("%f\n",s)行尾扔掉了“;”函數(shù)結(jié)束處扔掉了一個“}”2.29#include"stdio.h"main/*mainfunction*/main后扔掉了“( )”{floata,b,c,v;/*a,b,caresides,visvolumeofcube*/a=2.0;b=3.0;c=4.0行尾扔掉了“;”v=a*b*c;printf("%f\n",v)行尾扔掉了“;”}第三章一.選擇題3.1C3.2C3.3D3.4C3.5D3.6B3.7C3.8D3.9A3.10B3.11C3.12D3.13D3.14A3.15C3.16C3.17C3.18無答案3.19C3.20B二.填空題3.21(1)-2002500(2)i=-200,j=2500(3)i=-200j=25003.2212003.23一條語句;3.24;3.25100,25.81,1.8923410025.811.8923410025.811.892343.26x=127,x=127,x=177,x=7f,x=1273.27x=127,x=127,x=$127,x=$000127,x=%06d3.28a=513.789215,a=513.79,a=513.78921500,a=513.78921500三.編程題和改錯題3.29改正后的程序以下：main( ){doublea,b,c,s,v;printf("inputa,b,c:");scanf("%lf%lf%lf",&a,&b,&c);=a*b;v=a*b*c;printf("a=%f,b=%f,c=%f\n",a,b,c);printf("s=%f,v=%f\n",s,v);}3.30#includemain( ){inta=560,b=60;printf("560minuteis%dhourand%dminute.\n",a/b,a%b);}3.31#includemain( ){inta,b;a=1500;b=350;printf("adivbis:%d\n",a/b);printf("amodbis:%d\n",a%b);}3.32#includemain( ){doublea,b,c,ave;printf("input3doublenumber:\n");scanf("%lf%lf%lf",&a,&b,&c);printf("%.1f\n",(a+b+c)/3);}3.33#includevoidmain( ){inta,b,c,t;printf("請依次輸入整數(shù)a,b,c:");scanf("%d%d%d",&a,&b,&c);printf("\n你輸入的值是:a=%d,b=%d,c=%d\n",a,b,c);t=b;b=a;a=c;c=t;printf("互換此后的值是:a=%d,b=%d,c=%d\n",a,b,c);}第四章一.選擇題4.1A4.2A4.3A4.4D4.5C4.6A4.7B4.8C4.9D4.10C二.填空題4.11非004.12<>>=<=同級==！=同級4.13!&&||4.15!4.16a==b||a<cx>4||x<-44.1714.18x<=01>04.193224.20*#三.編程題4.21略4.22#include/*檢查日期的合法性intcheckdate(intyear{

*/,intmonth,intday)if(year<1900||year>2005){printf("輸入的年份無效!\n");return0;}elseif(month<0&&month>12){printf("輸入的月份無效!\n");return0;}elseif(day<=0&&day>31){printf("輸入的日期無效!\n");return0;}else{switch(month){case4:case6:case9:case11:if(day>30){printf("輸入的日期無效!\n");return0;}break;case2:if((year%4==0&&year%100!=0)||year%400==0){if(day>29){printf("輸入的日期無效!\n");return0;}}else{if(day>28){printf("輸入的出壽辰期無效!\n");return0;}}break;}/*endofswitch(m0)*/}return1;}voidmain( ){inty0,m0,d0;/*

壽辰

*/inty1,m1,d1;/*

目前日期

*/intyears,months,days;/*實足年紀(jì)*/printf("請輸入學(xué)生的壽辰:");scanf("%d%d%d",&y0,&m0,&d0);if(checkdate(y0,m0,d0)){printf("請輸入目前日期:");scanf("%d%d%d",&y1,&m1,&d1);/*目前日期合法性檢查*/if(!checkdate(y1,m1,d1)){return;}elseif(y0>y1){printf("出生年份比目前年份晚!\n");return;}elseif(y0==y1){if(m0>m1){printf("出生年月比目前年月晚!\n");return;}elseif(m0==m1){if(d0>d1){printf("出生年月日比目前年月日晚!\n");return;}}}}/*計算實足年紀(jì)*/years=y1-y0;months=m1-m0;days=d1-d0;/*修正實足年紀(jì)天數(shù)*/if(days<0){months--;switch(m1){case1:case5:case7:case10:case12:days+=30;break;case2:case4:case6:case8:case9:case11:days+=31;break;case3:if((y1%4==0&&y1%100!=0)||y1%400==0){days+=29;}else{days+=28;}break;}/*endofswitch(m1)*/}/*endofif(days<0)*//*修正實足年紀(jì)月數(shù)*/if(months<0){months+=12;years--;}/*endofif(months<0)*/printf("printf("printf("

出壽辰期目前日期實足年紀(jì)

:%d:%d:%d

月%d月%d月%d

日\n",y0,m0,d0);日\n",y1,m1,d1);日\n",years,months,days);return;}4.23#includevoidmain( ){inta;printf("請輸入一個整數(shù):");scanf("%d",&a);if(a%2==0){printf("%d是偶數(shù)\n",a);}else{printf("%d是奇數(shù)\n",a);}}4.24#includevoidmain( ){inta,b,c,temp,max;printf("請輸入三個整數(shù):");scanf("%d%d%d",&a,&b,&c);temp=(a>b)?a:b;max=(temp>c)?temp:c;printf("\n");printf("你輸入的數(shù)中最大的是%d.\n",max);}4.25不嵌套的if語句#includevoidmain( ){intx,y;printf("inputx:");scanf("%d",&x);if(x>-5&&x<0){printf("yis%d\n",y=x);}if(x==0){printf("yis%d\n",y=x-1);}if(x>0&&x<10){printf("yis%d\n",y=x+1);}if(x>=10||x<=-5){printf("error\n");}}嵌套的if語句#includevoidmain( ){intx,y;printf("inputx:");scanf("%d",&x);printf("\n");if(x<0){if(x>-5){printf("yis%d.\n",y=x);}else{printf("error!\n");}}if(0==x){printf("yis%d.\n",y=x-1);}if(x>0){if(x<10){printf("yis%d.\n",y=x+1);}else{printf("error!\n");}}}(3)if_else語句#includevoidmain( ){intx,y;printf("inputx:");scanf("%d",&x);if(x>-5&&x<0){printf("yis%d.\n",y=x);}elseif(x==0){printf("yis%d.\n",y=x-1);}elseif(x>0&&x<10){printf("yis%d.\n",y=x+1);}else{printf("error!\n");}}(4)switch語句#includevoidmain( ){intx,y;printf("inputx:");scanf("%d",&x);switch(x){case-4:case-3:case-2:case-1:printf("yis%d.\n",y=x);break;case0:printf("yis%d.\n",y=x-1);break;case1:case2:case3:case4:case5:case6:case7:case8:case9:printf("yis%d.\n",y=x+1);break;default:printf("error!\n");}}第五章一.選擇題5.1D5.2C5.3B5.4C5.5C5.6B5.7D5.8A5.9D5.10D二.填空題5.115465.12死循環(huán)5.13-15.14115.15d=1.0k++k<=n5.16x>=0x三.編程題5.17#includevoidmain( ){inti;intsig=1;intsum=0;for(i=1;i<=101;i++,i++){sum+=sig*i;sig*=-1;}printf("sum=%d\n",sum);}5.18(1)#includevoidmain( ){inti;doublem=1.0;doublee=1.0;for(i=1;i<50;i++){m*=i;e+=1/m;}printf("e=%f\n",e);}(2)#includevoidmain( ){inti=1;doublem=1.0;doublee=1.0;while(1/m>=0.0004){m*=i;e+=1/m;i++;}printf("e=%f\n",e);}5.19#includevoidmain( ){intyear;intcol=0;for(year=1600;year<=2000;year++){if((year%4==0&&year%100!=0)||year%400==0){printf("%d\t",year);col++;if(col%5==0){printf("\n");}}}printf("\n");}5.20#include#defineN7voidmain( ){inti;intj;intm;intk=N/2;for(i=0;i{m=i-k;if(m<0){m*=-1;}for(j=0;j{printf("");}for(j=0;j<2*(k-m)+1;j++){printf("*");}printf("\n");}}第六章一.選擇題6.1B6.2D6.3A6.4A6.5B6.6D6.7D6.8B6.9A6.10A6.11C二.填空題6.12-16.1316.14ctype.h6.1516.1610A20B30C40D6.177.29101.298AB6.19ABC(每個字符后有三個空格)三.編程題6.20#include#defineN80voidmain( ){charstr[N];intiLoop=0;gets(str);while(str[iLoop]){printf("%c-%d\t",str[iLoop],str[iLoop]);iLoop++;if(iLoop%3==0){printf("\n");}}printf("\n");}6.21#include#defineN80voidmain( ){charstr[N];intnum=0;intiLoop=0;gets(str);while(str[iLoop]){if(str[iLoop]>='0'&&str[iLoop]<='9'){num=10*num+(str[iLoop]-'0');}iLoop++;}printf("%d\n",num);}6.22#include#include#defineN80voidmain( ){charstr[N];intnum=-1;do{gets(str);num++;}while(strcmp(str,"EOF"));printf("您輸入了%d行字符！\n",num);}6.23#include#defineN80voidmain( ){charstr[N];intiLoop=0;intnum=0;gets(str);while(str[iLoop]&&iLoop<N){if(str[iLoop]>='a'&&str[iLoop]<='z'){num++;}iLoop++;}printf("您輸入了字符中有%d個小寫字母！\n",num);}6.24#includevoidmain( ){intline;intiLoop1;intiLoop2;printf("請輸入圖案的行數(shù)(不大于26):");scanf("%d",&line);for(iLoop1=0;iLoop1<line;iLoop1++){for(iLoop2=0;iLoop2<line-iLoop1;iLoop2++){printf("");}for(iLoop2=0;iLoop2<2*iLoop1+1;iLoop2++){printf("%c",iLoop1+'A');}printf("\n");}}第七章一.選擇題7.1C7.2C7.3B7.4C7.5A7.6D7.7A二.填空題7.8127.99.0000007.1047.11n=1s7.12<=yz*x7.131s*i0f(k)三.程序調(diào)試和編程題7.14fun(intn){intk,yes;for(k=2;k<=n/2;k++){if(n%k==0){yes=0;break;}elseyes=1;}returnyes;}7.15intmymod(inta,intb){returna%b;}7.16doublefun(intn){doublesum=0;intiLoop;intsig=-1;for(iLoop=1;iLoop<=n;iLoop++){sig*=-1;sum+=sig*1.0/iLoop;}returnsum;}7.17doublefun(intn){doublet=1.0;intiLoop;longtmp;for(iLoop=2;iLoop<=n;iLoop++){tmp=iLoop*iLoop;t-=1.0/tmp;}returnt;}7.18#include#includedoublefun(doublex){returnx*x+5*x+4;}voidmain( ){intx=2;printf("y1=%f\n",fun(x));printf("y2=%f\n",fun(x+15));printf("y3=%f\n",fun(sin(x)));}第八章一.選擇題8.1A8.2B8.3B8.4C8.5B8.6B8.7C8.8D8.9B8.10C8.11C8.12C二.填空題8.131108.14718.15(1)char*p=&ch;(2)p=&ch;(3)scanf("%c",p);(4)*p='A';(5)printf("%c",*p);8.16(1)s=p+3;(2)s=s-2(3)50(4)*(s+1)(5)2(6)1020304050三.編程題8.17voidfun(doublex,doubley,double*sum,double*div){*sum=x+y;*div=x-y;return;}8.18voidfun(doublex,doubley,doublez,double*max,double*min){*max=x;*min=x;if(*max<y){*max=y;}if(*max<z){*max=z;}if(*min>y){*min=y;}if(*min>z){*min=z;}return;}第九章一.選擇題9.1D9.2A9.3A9.4C9.5C9.6A9.7B9.8D9.9C9.10C9.11C9.12D9.13D9.14A9.15A9.16A9.17C9.18C二.填空題9.19909.2069.21129.2239.2327219.24-850,2,09.25k=pk9.26(c=getchar( ))c-'A'三.編程題9.27#include#defineN81intmain( ){intcounter[10]={0};intiLoop=0;charstr[N];gets(str);while(str[iLoop]){if(str[iLoop]>='0'&&str[iLoop]<='9'){counter[str[iLoop]-'0']++;}iLoop++;}for(iLoop=0;iLoop<10;iLoop++){printf("%d-%d\n",iLoop,counter[iLoop]);}return0;}9.28voidfun(intarray[],intarraysize,intstart){intiLoop;if(start<arraysize-1){if(start<=0){start=1;}for(iLoop=start;iLoop<arraysize;iLoop++){array[iLoop-1]=array[iLoop];}}for(iLoop=0;iLoop<arraysize;iLoop++){printf("No.%d=%d\n",iLoop,array[iLoop]);}}9.29intfun(intarry1[],intarry2[],intarrysize){intiLoop;intcounter=0;for(iLoop=0;iLoop<arrysize;iLoop++){if(arry1[iLoop]%2){arry2[counter++]=arry1[iLoop];}}returncounter;}9.30voidfun(chararray[],intarraysize){intiLoop1;intiLoop2;chartemp;/*冒泡排序*/for(iLoop1=0;iLoop1<arraysize-1;iLoop1++){for(iLoop2=0;iLoop2<arraysize-1-iLoop1;iLoop2++){if(array[iLoop2]<array[iLoop2+1]){temp=array[iLoop2];array[iLoop2]=array[iLoop2+1];array[iLoop2+1]=temp;}}}}9.31#includevoidfun(intarray[],intarraysize,intinertNumber){intiLoop;intiLoop2;if(array[0]<array[arraysize-1]){for(iLoop=0;iLoop<arraysize;iLoop++){if(array[iLoop]>inertNumber){for(iLoop2=arraysize-1;iLoop2>=iLoop;iLoop2--){array[iLoop2+1]=array[iLoop2];}array[iLoop]=inertNumber;break;}}if(iLoop>=arraysize){array[arraysize]=inertNumber;}}else{for(iLoop=0;iLoop<arraysize;iLoop++){if(array[iLoop]<inertNumber){for(iLoop2=arraysize-1;iLoop2>=iLoop;iLoop2--){array[iLoop2+1]=array[iLoop2];}array[iLoop]=inertNumber;break;}}if(iLoop>=arraysize){array[arraysize]=inertNumber;}}}intmain( ){intiLoop;inta[20]={7,6,5,3,2,1};for(iLoop=0;iLoop<6;iLoop++){printf("%d",a[iLoop]);}printf("\n");fun(a,6,0);for(iLoop=0;iLoop<7;iLoop++){printf("%d",a[iLoop]);}printf("\n");fun(a,7,4);for(iLoop=0;iLoop<8;iLoop++){printf("%d",a[iLoop]);}printf("\n");fun(a,8,8);for(iLoop=0;iLoop<9;iLoop++){printf("%d",a[iLoop]);}printf("\n");return0;}9.32intfun(intnumber,intarray[]){intiLoop=0;intiLoop2;intbinLen;intmidNumber;intdiv;intremain;midNumber=number;do{div=midNumber/2;remain=midNumber%2;midNumber=div;array[iLoop++]=remain;}while(midNumber);binLen=iLoop;for(iLoop2=0,iLoop=binLen-1;iLoop2<iLoop;iLoop2++,iLoop--){midNumber=array[iLoop2];array[iLoop2]=array[iLoop];array[iLoop]=midNumber;}returnbinLen;}9.33#include#include#defineN15voidfun(intarray[],intarraysize){intx;intiLoop;intiLoop2;for(iLoop=0;iLoop<arraysize;iLoop++){iLoop2=0;x=rand( )%20;do{if(x==array[iLoop2]&&iLoop>0){x=rand( )%20;iLoop2=0;}iLoop2++;}while(iLoop2<iLoop);array[iLoop]=x;}}intmain( ){inta[N];intiLoop;fun(a,N);for(iLoop=0;iLoop<N;iLoop++){printf("%d\n",a[iLoop]);}return0;}第十章一.選擇題10.1C10.2B10.3C10.4B10.5C10.6A10.7C10.8A10.9C10.10C二.填空題10.11GFEDCB10.12XYZ10.13SO10.141010.15Itis10.16strlen(str)-1j--10.17310.18goodgood！三.編程題10.19char*mygets(char*str){intiLoop=0;charch;while((ch=getchar( ))!='\n'){str[iLoop++]=ch;}str[iLoop]='\0';returnstr;}char*myputs(char*str){intiLoop=0;while(str[iLoop]){putchar(str[iLoop++]);}putchar('\n');returnstr;}10.20#include#includeintfun(char*str){intlen;intiLoop1;intiLoop2;intresult=1;len=strlen(str);for(iLoop1=0,iLoop2=len-1;iLoop1<iLoop2;iLoop1++,iLoop2--){if(str[iLoop1]!=str[iLoop2]){result=0;break;}}returnresult;}intmain( ){chara[20]="ABCDCBA";charb[20]="ABCDEBA";printf("%d\n",fun(a));printf("%d\n",fun(b));return0;}10.21charfun(char*str,intpos){intlen;intiLoop;charch;len=strlen(str);if(pos>len){returnNULL;}ch=str[pos];for(iLoop=pos;iLoop<len-1;iLoop++){str[iLoop]=str[iLoop+1];}str[len-1]='\0';returnch;}第十一章一.選擇題11.1D11.2B11.3A11.4C二.填空題11.5IJKLEFGHABCD11.6711.7811.8*(s+j)i+1i11.91711.10(*fun)( )(*fun)(a+i*h)/hmypoly三.編程題11.11#include#include#defineN81intmain(intargc,charargv){charsig;intdig;intpos;charstr[N]={'\0'};charoutStr[N]={'\0'};if(argc<2){sig='-';dig=10;}else{sig=argv[1][0];dig=argv[1][1]-'0';}printf("請輸入一個字符串：");gets(str);if(sig=='-'){pos=strlen(str)-dig;if(pos<=0){pos=0;}strcpy(outStr,str+pos);}elseif(sig=='+'){strcpy(outStr,str);pos=strlen(outStr);if(pos>dig){pos=dig;}outStr[pos]='\0';}printf("辦理后的字串為：");printf("%s\n",outStr);return0;}11.12#include#includevoidmovebin(char*bin){intlen;intiLoop;len=strlen(bin);for(iLoop=len;iLoop>0;iLoop--){bin[iLoop]=bin[iLoop-1];}return;}voidfun(intn,char*bin){intpos;pos=strlen(bin);if(n==0){return;}if(n==1){movebin(bin);bin[0]='1';return;}movebin(bin);bin[0]=(n%2)+'0';n/=2;fun(n,bin);return;}intmain( ){inta=4;charbin[50]={""};fun(a,bin);printf("%s\n",bin);return0;}11.13#includelongfun(intn){if(n==1){returnn;}else{returnfun(n-1)+n;}}intmain( ){intnum;intsum;printf("請輸入一個自然數(shù)：");scanf("%d",&num);sum=fun(num);printf("結(jié)果是：%d\n",sum);return0;}11.14#includeintfun(intn){if(n==0||n==1){return1;}else{returnfun(n-1)+fun(n-2);}}intmain( ){intnum;intresult;printf("請輸入一個自然數(shù)：");scanf("%d",&num);result=fun(num);printf("斐波拉契級數(shù)為：%d\n",result);return0;}第十二章一.選擇題12.1B12.2B12.3A12.4C12.5D12.6B12.7A12.8A二.填空題12.92,5,1,2,3,-212.102468第十三章一.選擇題13.1A13.2C13.3B13.4C13.5D13.6D13.7D二.填空題13.8ar=9ar=9ar=1113.9int*s*b三.編程題13.10#defineMYALPHA(C)((C>='A'&&C<='Z')||(C>='a'&&C<='z'))?1:013.11#defineSWAP(t,x,y){ttmp;tmp=x;x=y;y=tmp;}13.12#include#includeintmain( ){int*p;inttmp;intiLoop;intiLoop2;p=(int*)malloc(sizeof(int)*3);scanf("%d%d%d",p,p+1,p+2);for(iLoop=0;iLoop<2;iLoop++){for(iLoop2=0;iLoop2<2-iLoop;iLoop2++){if(*(p+iLoop2)>*(p+iLoop2+1)){tmp=*(p+iLoop2);*(p+iLoop2)=*(p+iLoop2+1);*(p+iLoop2+1)=tmp;}}}printf("%d%d%d\n",*p,*(p+1),*(p+2));free(p);p=NULL;return0;}第十四章一.選擇題14.1D14.2D14.3D14.4A14.5C14.6C14.7C14.8B二.填空題14.9structlink*next14.10p->nextm>p->data14.11(structlist*)structliststructlist*structlistreturnh三.編程題14.12#include#defineN3structstud{charnum[5],name[10];ints[4];doubleave;};voidreadrec(structstudarray[],intsize){intiLoop;for(iLoop=0;iLoop{scanf("%s%s%d%d%d%d",array[iLoop].num,array[iLoop].name,&array[iLoop].s[0],&array[iLoop].s[1],&array[iLoop].s[2],&array[iLoop].s[3]);array[iLoop].ave=(array[iLoop].s[0]+array[iLoop].s[1]+array[iLoop].s[2]+array[iLoop].s[3])/4.0;}return;}voidwriterec(structstudarray[],intsize){intiLoop;for(iLoop=0;iLoop{printf("%s\t%s\t%d\t%d\t%d\t%d\t%f\n",array[iLoop].num,array[iLoop].name,array[iLoop].s[0],array[iLoop].s[1],array[iLoop].s[2],array[iLoop].s[3],array[iLoop].ave);}return;}intmain( ){structstudstu[N];readrec(stu,N);writerec(stu,N);return0;}14.13#include#include#defineN100structnode{intdata;structnode*next;};intseekMaxValue(structnode*pNode){intmax;structnode*pMove;pMove=pNode;max=pMove->data;pMove=pMove->next;while(pMove){if(max<pMove->data){max=pMove->data;}pMove=pMove->next;}returnmax;}structnode*seekMaxValueAddress(structnode*pNode){intmax;structnode*maxAddress;structnode*pMove;pMove=pNode;max=pMove->data;maxAddress=pMove;pMove=pMove->next;while(pMove){if(max<pMove->data){max=pMove->data;maxAddress=pMove;}pMove=pMove->next;}returnmaxAddress;}intmain( ){structnode*head;structnode*pNode;intiLoop;head=(structnode*)malloc(sizeof(structnode));pNode=head;pNode->next=NULL;for(iLoop=0;iLoop{pNode->next=(structnode*)malloc(s