C語言程序設(shè)計(jì)蘇小紅版答案

1、2.2 #include<stdio.h>main()floatx=2.5,y=2.5,z=2.5;printf("x=%fn",x);printf("y=%fn",y);printf("z=%fn",z);3.1 (1)#include<stdio.h>main()inta=12,b=3;floatx=18.5,y=4.6;printf("%dn",(float)(a*b)/2);printf("%dn",(int)x%(int)y);3.2 #include<s

2、tdio.h>main()intx,b0,b1,b2,s;printf("Inputx:");scanf("%d"，&x);b2=x/100;b仁(x-b2*100)/10;b0=x%10;s=b0*100+b1*10+b2;printf("s=%dn",s);3.3 #include<stdio.h>#include<math.h>main()floatrate=0.0225;floatn,capital,deposit;printf("Inputn,capital:");s

3、canf("%f,%f",&n,&capital);deposit=capital*pow(1+rate,n);printf("deposit=%fn",deposit);3.4 #include<stdio.h>#include<math.h>main()floata,b,c;doublex,y;printf("lnputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);x=(-b+sqrt(b*b-4*a*c)/(2*a);y

4、=(-b-sqrt(b*b-4*a*c)/(2*a);printf("x=%f,y=%fn",x,y);4.1(1)#include<stdio.h>main()charc1='a',c2='b',c3='c'printf("a%cb%cc%cn",c1,c2,c3);4.1(2)#include<stdio.h>main()inta=12,b=15;printf("a=%d%,b=%d%n",a,b);4.1(3)#include<stdio.h>m

5、ain()inta,b;scanf("%2d%*2s%2d",&a,&b);printf("%d,%dn",a,b);4.2#include<stdio.h>main()longa,b;floatx,y;scanf("%d,%dn",&a,&b);scanf("%f,%fn",&x,&y);printf("a=%d,b=%dn",a,b);printf("x=%f,b=%fn",x,y);5.1 #include&l

6、t;stdio.h>main()floata;printf("Innputa:");scanf("%f",&a);if(a>=0)a=a;printf("a=%fn",a);elsea=-a;printf("a=%fn",a);5.2 #include<stdio.h>main()inta;printf("Inputa:");scanf("%d",&a);if(a%2=0)printf("a是偶數(shù)");elsepri

7、ntf("a是奇數(shù)");5.3 #include<stdio.h>#include<math.h>main()floata,b,c,s,area;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);if(a+b>c&&a+c>b&&b+c>a)s=(a+b+c)/2;area=(float)sqrt(s*(s-a)*(s-b)*(s-c);printf("area=%fn"

8、,area);elseprintf("不是三角形");5.4 #include<stdio.h>#include<math.h>main()floata,b,c,x,y;printf("Inputa,b,c:");scanf("%f,%f,%f",&a,&b,&c);if(a=0)printf("該方程不是一元二次方程n");if(b*b-4*a*c>0)x=(-b+sqrt(b*b-4*a*c)/(2*a);y=(-b-sqrt(b*b-4*a*c)/(2*a

9、);printf("x=%f,y=%fn",x,y);elseif(b*b-4*a*c=0)x=-b/(2*a);y=-b/(2*a);printf("x=%f,y=%fn",x,y);elseprintf("該方程無實(shí)根n");5.5 #include<stdio.h>main()intyear,flag;printf("Inputayear:");scanf("%d",&year);if(year%4=0&&year%400!=0|year%400=0)f

10、lag=1;elseflag=0;if(flag=1)printf("%disaleapyear!n",year);elseprintf("%disnotaleapyear!n",year);5.6 #include<stdio.h>main()intyear,flag;printf("Inputayear:");scanf("%d",&year);flag=year%400=0|year%4=0&&year%100!=0?1:0;if(flag=1&&flag!

11、=0)printf("%disaleapyear!n",year);elseprintf("%disnotaleapyear!n",year);5.7 #include<stdio.h>main()charch;printf("Inputch:");scanf("%c",&ch);if(ch>='a'&&ch<='z')ch=getchar();ch=ch-32;printf("%c,%dn",ch,ch);else

12、if(ch>='A'&&ch<='Z')ch=getchar();ch=ch+32;printf("%c,%dn",ch,ch);elseprintf("%c",ch);5.8 #include<stdio.h>main()charch;printf("Inputch:");scanf("%c",&ch);if(ch>=48&&ch<=57)printf("ch是數(shù)字字符n");elsei

13、f(ch>=65&&ch<=90)printf("ch是大寫字母n");elseif(ch>=97&&ch<=122)printf("ch是小寫字母n");elseif(ch=32)printf("ch是空格n");elseprintf("ch是其他字符n");5.9 #include<stdio.h>main()intscore,grade;printf("Inputscore:");scanf("%d",

14、&score);grade=score/10;if(score<0|score>100)printf("Inputerror'n”)；if(score>=90&&score<=100)printf("%d-An",score);elseif(score>=80&&score<90)printf("%d-Bn",score);elseif(score>=70&&score<80)printf("%d-Cn",scor

15、e);elseif(score>=60&&score<70)printf("%d-Dn",score);elseif(score>=0&&score<60)printf("%d-En",score);5.10 #include<stdio.h>main()intyear,month;printf("Inputyear,month:");scanf("%d,%d",&year,&month);if(month>12|month&

16、lt;=0)printf("errormonthn");elseswitch(year,month)case12:case10:case8:case7:case5:case3:case I:printf("31天n");break;case II:case9:case6:case4:printf("30天n");break;case2:if(year%4=0&&year!=0|year%400=0)printf("29天n");elseprintf("28天n");break;d

17、efault:printf("Inputerror'n”)；6.1(1)#include<stdio.h>main()inti,j,k;charspace=''for(i=1;i<=4;i+)for(j=1;j<=i;j+)printf("%c",space);for(k=1;k<=6;k+)printf("*");printf("n");6.1(2)#include<stdio.h>main()intk=4,n;for(n=0;n<k;n+)if(n%

18、2=0)continue;k-;printf("k=%dn,n=%dn",k,n);6.1(3)#include<stdio.h>main()intk=4,n;for(n=0;n<k;n+)if(n%2=0)break;k-;printf("k=%d,n=%dn",k,n);6.2(1)#include<stdio.h>main()inti,sum=0;for(i=1;i<=101;i+)sum=sum+i;printf("sum=%dn",sum);6.2(2)#include<stdio.

19、h>main()longi;longterm,sum=0;for(i=1;i<=101;i=i+2)term=i*(i+1)*(i+2);sum=sum+term;printf("sum=%ldn",sum);6.2(4)#include<stdio.h>#include<math.h>main()intn=1;floatterm=1.0,sign=1,sum=0;while(term<=-1e-4|term>=1e-4)term=1.0/sign;sum=sum+term;sign=sign+n;n+;printf(&quo

20、t;sum=%fn",sum);6.2 (5)#include<stdio.h>#include<math.h>main()intn=1,count=1;floatx;doublesum,term;printf("Inputx:");scanf("%f",&x);sum=x;term=x;doterm=-term*x*x/(n+1)*(n+2);sum=sum+term;n=n+2;count+;while(fabs(term)>=1e-5);printf("sin(x)=%f,count=%dn

21、",sum,count);6.3 #include<stdio.h>main()intx=1,find=0;while(!find)if(x%2=1&&x%3=2&&x%5=4&&x%6=5&&x%7=0)printf("x=%dn",x);find=1;x+;/*intx,find=0;for(x=1;!find;x+)if(x%2=1&&x%3=2&&x%5=4&&x%6=5&&x%7=0)printf("x=%

22、dn",x);find=1;*/6.4 #include<stdio.h>main()inti,n;longp=1,m=1;printf("Inputn:");scanf("%d",&n);for(i=1;i<=n;i+)p=i*i;m=i*i*i;printf("p=%d,m=%dn",i,p,i,m);6.5 #include<stdio.h>main()floatc,f;for(c=-40;c<=110;c=c+10)f=9/5*c+32;printf("f=%fn

23、",f);6.6 #include<stdio.h>#include<math.h>main()intn;doublec=0.01875,x;dox=x*pow(1+c,12)-1000;n+;while(x>0);printf("x=%dn",x);6.7 #include<stdio.h>main()intn=0;floata=100.0,c;printf("lnputc:");scanf("%f",&c);doa=a*(1+c);n+;while(a<=200);

24、printf("n=%dn",n);6.8 #include<stdio.h>#include<math.h>main()intn=1,count=1;doublesum=1,term=1;while(fabs(term)>=1e-5)term=pow(-1,count)*(1.O/(n+2);sum=sum+term;n=n+2;count+;sum=4*sum;printf("sum=%f,count=%dn",sum,count);6.9 #include<stdio.h>#include<math.

25、h>main()intn=1,count=1;doublesum=1,term=1;while(fabs(term)>=1e-5)term=term*(1.0/n);sum=sum+term;n+;count+;printf("sum=%f,count=%dn",sum,count);6.10 #include<stdio.h>#include<math.h>main()int兀for(x=100;x<=999;x+)if(x=pow(x/100,3)+pow(x/10%10,3)+pow(x%10,3)printf("x

26、=%dn",x);6.11 #include<stdio.h>main()inti=0,n;longsum=0,term=1;printf("Inputn:");scanf("%d",&n);doi+;term=term*i;sum=sum+term;while(sum<n);printf("%dn",i-1);6.12 #include<stdio.h>main()inti,n,m,count=0,sum=0;printf("Inputn:");scanf(&quo

27、t;%d",&n);for(i=1;i<=n;i+)printf("Inputm:");scanf("%d",&m);if(m>0)sum=sum+m;count+;elsebreak;printf("sum=%d,count=%dn",sum,count);)6.13 #include<stdio.h>main()(inti,n,m,count=O,sum=O;printf("Inputn:");scanf("%d",&n);for(i

28、=1;i<=n;i+)(printf("Inputm:");scanf("%d",&m);if(m>0|m<0)(sum=sum+m;count+;)else(break;)printf("sum=%d,count=%dn",sum,count);)6.14 #include<stdio.h>main()(intx,y,z;for(x=0;x<=17;x+)(for(y=0;y<=25;y+)(3*x+2*y+z=50;z=30-x-y;if(3*x+2*y+z=50&&

29、;x+y+z=30)printf("x=%d,y=%d,z=%dn",x,y,z);)6.15 #include<stdio.h>main()intx,y;for(x=0;x<=98;x+)y=98-x;2*x+4*y=386;if(x+y=98&&2*x+4*y=386)(printf("x=%d,y=%dn",x,y);)6.16 #include<stdio.h>main()(intx,y,z;for(x=0;x<=20;x+)(for(y=0;y<=33;y+)(3*y+5*x+z/3.0

30、=100;z=100-x-y;if(5*x+3*y+z/3.0=100&&z+x+y=100)(printf("x=%d,y=%d,z=%dn",x,y,z);)6.17 #include<stdio.h>main()(intx,y,z;for(x=1;x<=9;x+)(for(y=1;y<=17;y+)(10*x+5*y+z=100;z=50-x-y;if(10*x+5*y+z=100&&x+y+z=50&&z>0)(printf("x=%d,y=%d,z=%dn",x,y,

31、z);7.1 #include<stdio.h>intSquare(inti)returni*i;intmain()inti=0;i=Square(i);for(;i<3;i+)staticinti=1;i+=Square(i);printf("%d,",i);printf("%dn",i);return0;7.2 #include<stdio.h>inthour,minute,second;voidupdate()second+;if(second=60)second=0;minute+;if(minute=60)minu

32、te=0;hour+;if(hour=24)hour=0;voiddisplay()printf("%d,%d,%dn",hour,minute,second);voiddelay()intt;for(t=0;t<100000000;t+);intmain()inti;voidupdaye(),display(),delay();for(i=0;i<1000000;i+)update();display();delay();return0;7.3 #include<stdio.h>intGetMax(inta,intb);intmain()intx,

33、y,max;printf("Inputx,y:");scanf("%d,%d",&x,&y);max=GetMax(x,y);printf("max=%dn",max);return0;intGetMax(intm,intn)if(m>=n)returnm;elsereturnn;7.4 #include<stdio.h>intLCM(intn,intm);intmain()inta,b;printf("Inputa,b:");scanf("%d,%d",&am

34、p;a,&b);printf("%dn",LCM(a,b);return0;intLCM(intn,intm)int兀intfind=0;for(x=1;!find;x+)if(x%n=0&&x%m=O)find=1;returnx-1;7.5 #include<stdio.h>longFact(intn);intmain()intm,a;printf("Inputm:");scanf("%d",&m);for(a=1;a<=m;a+)printf("%d!=%ldn&quo

35、t;,a,Fact(a);return0;longFact(intn)inti;longresult=1;for(i=2;i<=n;i+)result*=i;returnresult;7.6 #include<stdio.h>longFact(intn);intmain()intm;longret;printf("Inputm:");scanf("%d",&m);ret=Fact(m);printf("ret=%dn",ret);return0;longFact(intn)inti;longresult=1,

36、sum=0;for(i=2;i<=n;i+)result*=i;sum=sum+result;returnsum;7.7 (1)#include<stdio.h>intGcd(inta,intb);intmain()intm,n;printf("Inputm,n:”)；scanf("%d,%d",&m,&n);printf("%dn",Gcd(m,n);return0;intGcd(inta,intb)intt,min,find=0;min=a<b?a:b;t=min;for(t=min;!find;t-

37、)a%t=0;b%t=0;if(a%t=0&&b%t=0)returnt;find=1;7.8 (2)#include<stdio.h>intGcd(inta,intb);intmain()intm,n;printf("Inputm,n:”)；scanf("%d,%d",&m,&n);printf("%dn",Gcd(m,n);return0;intGcd(inta,intb)intr,temp;r=a%b;if(r=0)returnb;elsedotemp=b;b=r;a=temp;r=a%b;wh

38、ile(r!=O);returnb;8.1 (1)#include<stdio.h>voidFunc(intx)x=2;intmain()intx=10;Func(x);printf("%d",x);return0;8.1 (2)#include<stdio.h>voidFunc(intb)intj;for(j=0;j<4;j+)bj=j;intmain()staticinta=5,6,7,8,i;Func(a);for(i=0;i<4;i+)return0;8.2 (1)intPositiveNum(inta,intn)inti,cou

39、nt=0;for(i=0;i<n;i+)if(ai>0)count+;return0;8.3 (2)voidFib(longf,longn)inti;f0=0;f1=1;for(i=2;i<n;i+)fi=fi-1+fi-2;8.4 (3)#include<stdio.h>intmain()inta10,n,max,min,maxPos,minPos;for(n=0;n<10;n+)scanf("%d",&an);max=min=a0;maxPos=minPos=0;for(n=0;n<10;n+)if(an>max)

40、max=an;maxPos=n;elseif(an<min)min=an;minPos=n;printf("max=%d,pos=%dn",max,maxPos);printf("min=%d,pos=%dn",min,minPos);return0;8.5 voidDivArray(int*pArray,intn)inti;for(i=0;i<n;i+)pArrayi/=pAttayO;8.6 #include<stdio.h>#defineN40intFailNum(intscore,intn);voidReadScore(i

41、ntscore,intn);intmain()intscoreN,n;printf("Inputn:");scanf("%d",&n);ReadScore(score,n);FailNum(score,n);printf("FailNumstudentsare%dn",FailNum(score,n);return0;intFailNum(intscore,intn)inti,count=0;for(i=0;i<n;i+)if(scorei<60)count+;returncount;voidReadScore(i

42、ntscore,intn)inti;printf("Inputscore:");for(i=0;i<n;i+)scanf("%d"，&scorei);8.7 #include<stdio.h>#defineN40intHighAver(intscore,intn);intReadScore(intscore);intmain()intscoreN,n;n=ReadScore(score);printf("HighAverstudentsare%dn",HighAver(score,n);return0;int

43、HighAver(intscore,intn)inti,count=0,sum=0,aver;for(i=0;i<n;i+)sum=sum+scorei;aver=sum/n;for(i=0;i<n;i+)if(scorei>aver)count+;returncount;intReadScore(intscore)inti=-1;doi+;printf("Inputscore:");scanf("%d",&scorei);while(scorei>=0);returni;8.8 #include<stdio.h&g

44、t;#defineN40intReadScore(intscore,longnum);intFindMax(intscore,longnum,intn);intmain()intscoreN,n,max,num,t;longnumN;t=FindMax(score,n);max=scoret;num=numt;printf("max=%d,num=%dn",max,num);return0;intReadScore(intscore,longnum)inti=-1;doi+;printf("Inputstudent'sIDandscore:");

45、scanf("%ld%d",&numi,&scorei);while(numi>0&&scorei>=0);returni;intFindMax(intscore,longnum,intn)intmax,i;max=score0;for(i=1;i<n;i+)if(scorei>max)max=scorei;returni;8.9 #include<stdio.h>#defineN40intRead(inta);intChangeArry(inta,intn);intmain()intaN,n;printf

46、("%dn",ChangeArry(a,n);return0;intRead(inta)inti;for(i=0;i<9;i+)printf("Inputa:");scanf("%d",&ai);returni;intChangeArry(inta,intn)intmax,min,i,maxpos,minpos,term;max=min=score0;for(i=1;i<n;i+)if(ai>max)max=scorei;maxpos=n;else(ai<min)min=ai;minpos=n;temp

47、=maxpos;maxpos=minpos;minpos=temp;returnai;8.10#include<stdio.h>#defineN5voidmain()intaNN;intsum=0;inti,j;printf("請(qǐng)輸入一個(gè)%d*%d的矩陣n",N,N);for(i=0;i<N;i+)for(j=0;j<N;j+)scanf("%d",&aij);for(i=0;i<N;i+)for(j=0;j<N;j+)if(i=jIIi+j=N-1)sum=sum+aij;printf("對(duì)角線元素

48、之和為：dn",sum);8.11#include<stdio.h>#defineN2#defineM3voidmain()intaNM,bNM;inti,j,sum1=0,sum2=0,sum=0;printf("請(qǐng)輸入一個(gè)%d*%d的矩陣n",N,M);for(i=0;i<N;i+)for(j=0;j<M;j+)scanf("%d",&aij);sum1=sum1+aij;printf("請(qǐng)輸入一個(gè)%d*%d的矩陣n",N,M);for(i=0;i<N;i+)for(j=0;j<

49、;M;j+)scanf("%d",&bij);sum2=sum2+aij;sum=sum1+sum2;printf("sum=%dn",sum);8.12#include<stdio.h>#defineN7voidYangHui(intaNN,intn);voidmain()inti,j,n,bNN;printf("Inputn:");scanf("%d",&n);YangHui(b,n);for(i=0;i<n;i+)for(j=0;j<=i;j+)printf("

50、;%4d",bij);printf("n");voidYangHui(intaNN,intn)inti,j;for(i=0;i<n;i+)aiO=1；aii=1；for(i=2;i<n;i+)for(j=1;j<i;j+)aij=ai-1j-1+ai-1j;8.13 #include<stdio.h>#defineN12voidmain()inti;intfN=1,1;printf("%d:%dn",O,fO);printf("%d:%dn",1,f1);for(i=2;i<N;i+)fi

51、=fi-1+fi-2;printf("%d:%dn",i+1,fi);8.14 #include<stdio.h>#include<stdlib.h>#include<time.h>#defineN6000voidmain()intaN,i;intb1=0,b2=0,b3=0,b4=0,b5=0,b6=0;floatp1,p2,p3,p4,p5,p6;srand(time(NULL);for(i=0;i<N;i+)ai=rand()%6+1;printf("%3d",ai);if(ai=1)b1+;if(ai=2

52、)b2+;if(ai=3)b3+;if(ai=4)b4+;if(ai=5)b5+;if(ai=6)b6+;p仁(float)(b1/6000.0);p2=(float)(b2/6000.0);p3=(float)(b3/6000.0);p4=(float)(b4/6000.0);p5=(float)(b5/6000.0);p6=(float)(b6/6000.0);printf("骰子出現(xiàn)printf("骰子出現(xiàn)printf("骰子出現(xiàn)printf("骰子出現(xiàn)printf("骰子出現(xiàn)printf("骰子出現(xiàn)1的概率2的概率3的概率4的

53、概率5的概率6的概率%.2fn",p1);%.2fn",p2);%.2fn",p3);%.2fn",p4);%.2fn",p5);%.2fn",p6);9.1 (1)voidSwap(int*x,int*y)int*pTemp;/*pTemp未進(jìn)行初始化，*pTemp指向哪里位置*pTemp=*x;*x=*y;*y=*pTemp;9.1(2)voidSwap(int*x,int*y)int*pTemp;pTemp=x;x=y;y=pTemp;錯(cuò)誤，x,y沒有指向類型9.2 #include<stdio.h>intmain(

54、)inta=1,2,3,4,5;int*p=a;printf("%d,%d,%d,%d,%d,%d,%dn",*p,*(+p),(*p)+,*p,*p-,-(*p),*p);return0;9.3 #include<stdio.h>voidSwap(int*x,int*y);intmain()inta6=1,2,3,4,5,6,b6=11,22,33,44,55,66;inti;printf("BeforeArrayn");for(i=0;i<6;i+)printf("%dn",ai);for(i=0;i<6;

55、i+)printf("%dn",bi);for(i=0;i<6;i+)Swap(&ai,&bi);printf("AfterArrayn");for(i=0;i<6;i+)printf("%dn",ai);for(i=0;i<6;i+)printf("%dn",bi);return0;voidSwap(int*x,int*y)inttemp;temp=*x;*x=*y;*y=temp;9.4 #include<stdio.h>#defineN10voidFindMaxM

56、in(inta,int*pMaxa,int*pMaxnum,int*pMina,int*pMinnum);intmain()intaN;inti,maxa,mina,maxnum,minnum;printf("Inputa:");for(i=0;i<10;i+)scanf("%d",&ai);FindMaxMin(a,&maxa,&maxnum,&mina,&minnum);printf("maxa=%d,maxnum=%d,mina=%d,minnum=%dn",maxa,maxnum,

57、mina,minnum);return0;voidFindMaxMin(inta,int*pMaxa,int*pMaxnum,int*pMina,int*pMinnum)inti;*pMaxa=a0;* pMina=a0;* pMaxnum=0;* pMinnum=0;for(i=0;i<10;i+)if(ai>*pMaxa)*pMaxa=ai;*pMaxnum=i;elseif(ai<*pMina)*pMina=ai;*pMinnum=i;10.1 voidMYStrcpy(char*dstStr,constchar*srcStr)while(*dstStr+=*srcSt

58、r+)!='O')10.2 #include<stdio.h>main()char*a="main()char*a=%c%s%c;printf(a,34,a,34);"printf(a,34,a,34);10.3 (1)unsignedintMyStrlen(char*p)main()unsignedintlen;len=0;for(;*pa!='0'pa+)len+;returnlen;10.4 (2)unsignedintMyStrlen(chars)char*p=s;while(*p!='0')p+;return(p-*p);10.5 (3)intMyStrcmp(char*p1,char*p2)for(;*p仁=*p2;p1+,p2+)if(*p1='0')return-1;return1;10.6 (4)intMyStrcmp(chars,chart)inti;for(i=0;si=ti;i+)i