C-Primer-Plus第六版中文版习题答案.pdf

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1、C Primer Plus 第六版中文版习题答案 Github:zhayujie/C-Primer-Plus 第一章 1.#include int main(void)double inch,cm;printf(Please input the inches:);scanf(%lf,&inch);cm=inch*;printf(%g cmn,cm);return 0;第二章 3.#include int main(void)int days,years=21;，days=years*365;printf(我的年龄是%d 岁，%d 天n,years,days);return 0;4.|#incl

2、ude void jolly(void);void deny(void);int main(void)jolly();jolly();deny();return 0;void jolly(void)printf(For hes a jolly good fellow!n);void deny(void)printf(Which nobody can deny!n);5.#include void br(void);.void ic(void);int main(void)br();printf(,);ic();printf(n);ic();printf(n);br();printf(n);re

3、turn 0;void br(void)￥printf(Brazil,Russia);void ic(void)printf(India,China);6.#include int main(void)int toes=10;int toes_2,toes2;toes_2=2*toes;toes2=toes*toes;printf(toes 是%d,toes 的两倍是%d,toes 的平方是%dn,toes,toes_2,toes2);return 0;8.#include(void one_three(void);void two(void);int main(void)printf(sta

4、rting nown);one_three();、void one_three(void)printf(onen);two();printf(threen);printf(done!n);void two(void)printf(twon);第三章 2.#include、int main(void)char ch;printf(please input a number:);scanf(%d,&ch);printf(%cn,ch);return 0;4.#include int main(void)float a;；printf(Enter a floating-point value:);s

5、canf(%f,&a);printf(fixed-point notation:%fn,a);printf(exponential notation:%en,a);return 0;。5.#include int main(void)int age;double seconds;printf(please input your age:);)scanf(%d,&age);seconds=age*;printf(the corresponding seconds are:%en,seconds);return 0;，7.#include int main(void)float inches,cm

6、s;printf(input your height(inch):);scanf(%f,&inches);cms=inches*;【printf(your height(cm):%fn,cms);return 0;8.#include*int main(void)float pint,ounce,soupspoon,teaspoon,cup;printf(input the number of cups:);scanf(%f,&cup);pint=cup/2;ounce=cup*8;soupspoon=ounce*2;teaspoon=soupspoon*3;printf(they are e

7、quivalent of:n%f pintn%f ouncen%f soupspoonsn%f teaspoonsn,pint,ounce,soupspoon,teaspoon);return 0;第四章 1.#include int main(void)char firstname40,lastname40;printf(Input your firstname:);scanf(%s,firstname);printf(Input your lastname:);scanf(%s,lastname);printf(Your name is%s,%sn,firstname,lastname);

8、return 0;2.#include#include int main(void)char name40;int width;$printf(Input your name:);scanf(%s,name);width=strlen(name)+3;printf(%*sn,width,name);#include int main(void)￥float height;char name40;printf(Input your height(cm)and name:);scanf(%f%s,&height,name);height=height/100;printf(%s,you are%.

9、3fm talln,name,height);return 0;5.#include int main(void)float speed,size,time;printf(Input the download speed(Mb/s)and the file size(MB):n);scanf(%f%f,&speed,&size);time=size/speed*;printf(At%.2f megabits per second,a file of%.2f megabytesn,speed,size);printf(downloads in%.2f seconds.n,time);return

10、 0;!6.#include#include int main(void)char firstname40,lastname40;printf(Input your firstname:);scanf(%s,firstname);printf(Input your lastname:);scanf(%s,lastname);printf(%s%sn,firstname,lastname);printf(%*d%*dn,strlen(firstname),strlen(firstname),strlen(lastname),strlen(lastname);printf(%s%sn,firstn

11、ame,lastname);printf(%*d%*dn,?-strlen(firstname),strlen(firstname),-strlen(lastname),strlen(lastname);return 0;7.#include#include?int main(void)double a=;float b=;printf(%.6f%.6fn,a,b);2f,%.12fn,a,b);printf(%.16f,%.16fn,a,b);printf(DBL_DIG:%dn,DBL_DIG);printf(FLT_DIG:%dn,FLT_DIG);）return 0;8.#includ

12、e#define GALLON fn,mile/gallon);printf(Litre per 100 kilometers:%.1fn,，gallon*GALLON/(mile*MILE)*100);return 0;第五章 1.#include#define H_P_M 60 n,min,hour,left);?printf(Enter your next value:);scanf(%d,&min);printf(Good bye!n);return 0;】2.#include int main(void)int num,count;printf(Input a integer:);s

13、canf(%d,&num);count=0;while(count+11)printf(%d,num);num+;printf(n);return 0;3.#include#define DAYS_PER_WEEK 7 n,day,week,left);printf(Next input:);scanf(%d,&day);return 0;4.#include#define CM_PER_FEET f cm=%d feet,%.1f inchesn,cm,feet,inch);printf(Enter a height in centimeters(=0 to quit):);*scanf(%

14、f,&cm);printf(byen);return 0;5.#include int main(void)int count,sum,days;printf(Input the number of days:);scanf(%d,&days);count=sum=0;while(count+days)sum=sum+count;printf(The money you earned:%dn,sum);return 0;6.|#include int main(void)int count,sum,days;printf(Input the number of days:);scanf(%d,

15、&days);count=sum=0;while(count+days)sum=sum+count*count;printf(The money you earned:%dn,sum);return 0;7.#include,void cube(double n);int main(void)double num;printf(Input a number:);scanf(%lf,&num);cube(num);void cube(double n)printf(The cube of%f is%fn,n,n*n*n);8.#include int main(void)int num1,num

16、2;printf(This program computes moduli.n);printf(Enter an integer to serve as the second operand:);scanf(%d,&num1);printf(Now enter the first operand:);#scanf(%d,&num2);while(num20)printf(%d%d is%dn,num2,num1,num2%num1);printf(Enter next number for first operand(=0 to quit):);scanf(%d,&num2);printf(D

17、onen);)9.#include void Temperatures(double fah);int main(void)/double fah,cel,kel;n);void Temperatures(double fah)const double a=,b=,c=,d=;printf(%.2f is%.2f,%.2f K.n,|fah,a/b*(fah-c),a/b*(fah-c)+d);第六章 1.#include#define SIZE 26 int main(void)char chSIZE;int index;for(index=0;indexSIZE;index+)chinde

18、x=a+index;printf(%c,chindex);printf(n);return 0;2.#include int main(void)int i,j;for(i=1;i=5;i+)for(j=1;j=i;j+)printf($);printf(n);return 0;:3.#include int main(void)int i,j;for(i=1;i=6;i+)for(j=0;ji;j+)(printf(%c,F-j);printf(n);return 0;4.、#include#define ROWS 6 int main(void)char ch;int i,j;for(ch

19、=A,i=0;iROWS;i+)for(j=0;j=i;j+)printf(%c,ch+);printf(n);return 0;5.#include#define ROWS 5 int main(void)char ch=A;int i,j;for(i=1;i=ROWS;i+)for(j=1;j=ROWS-i;j+)printf();for(j=0;j=0;j-)printf(%c,ch+j);。printf(n);return 0;6.#include int main(void)int max,min,num;printf(Input the min and max:);scanf(%d

20、%d,&min,&max);printf(%10s%10s%10sn,number,square,cube);|for(num=min;num=max;num+)printf(%10d%10d%10dn,num,num*num,num*num*num);return 0;7.#include、int main(void)double n1,n2;printf(Input two numbers:);while(2=scanf(%lf%lf,&n1,&n2)printf(%fn,(n1-n2)/n1*n2);printf(Input your next pair of numbers:);pri

21、ntf(Bye!n);return 0;9.#include&double calculate(double n1,double n2);int main(void)double num1,num2;printf(Input two numbers:);while(2=scanf(%lf%lf,&num1,&num2)#include int main(void);int lower,upper;int num,sum;printf(Enter lower and upper integer limits:);scanf(%d%d,&lower,&upper);while(lower uppe

22、r)for(sum=0,num=lower;num=upper;num+)sum=sum+num*num;#include#define SIZE 8 int main(void)int numSIZE;int index;printf(Enter 8 integers:);for(index=0;indexSIZE;index+)#include int main(void)double sum1=0,sum2=0;int count,items,sign;printf(Enter the items:);scanf(%d,&items);.=%fn,sum1);printf(-+-+.=%

23、fn,sum2);return 0;】13.#include#define SIZE 8 int main(void)int index,count,numSIZE;for(index=0,count=1;index SIZE;index+)count*=2;numindex=count;#include#define SIZE 8 int main()double num1SIZE,num2SIZE;int index1,index2,index;printf(Enter 8 numbers to the first array:n);for(index1=0;index1 SIZE;ind

24、ex1+)scanf(%lf,&num1index1);#include#include#define SIZE 255 int main(void)（int index;char chSIZE;printf(Enter a line:);for(index=0,scanf(%c,&ch0);chindex!=n;)index+;/scanf(%c,&chindex);#include#define RATE_DAPHNE#define RATE_DEIRDRE n,year,daphne,deirdre);#include#define INITIAL_MONEY 100 n,year);r

25、eturn 0;。18.#include#define INITIAL_NUMBER 5#include int main(void)$char ch;int n_space=0;n);while(ch=getchar()!=#)if(ch=)n_space+;else if(ch=n)n_newline+;。else n_others+;printf(Spaces:%d,newlines:%d,others:%dn,n_space,n_newline,n_others);return 0;2.#include#define CHARS_PER_LINE 8#include int main(

26、void)int num;int n_even=0,n_odd=0;fn,n_even,(n_even=0)0:(float)sum_even/n_even);printf(The number of odd numbers is%d,and the everrage of odd numers is%.2fn,n_odd,(n_odd=0)0:(float)sum_odd/n_odd);return 0;&4.#include int main(void)char ch;int n_repl=0;)ch=!;n_repl+;n,n_repl);return 0;、5.#include int

27、 main(void)char ch;int n_repl=0;:ch=!;n_repl+;break;case!:printf(!);n_repl+;break;default:break;n,n_repl);return 0;6.#include int main(void)char ch;char last_ch=0;n,count);return 0;7.#include#define BASE 1000 lfnYour tax is$%.2lfn Your net income is$%.2lfn,gross,tax,(gross-tax);return 0;8.#include#d

28、efine BASE1#define BASE2#define BASE3#define BASE4 n);return 0;default:printf(Please input the right option.n);goto printpart;lfnYour tax is$%.2lfn Your net income is$%.2lfn,;gross,tax,(gross-tax);printf(nYour next choice:n);return 0;9.$#include int main(void)int div,prime;int num,count;int flag;pri

29、ntf(Input a positive integer:);scanf(%d,&num);printf(The prime numbers in range:n);for(prime=2;prime=num;prime+)#include#define RATE1#define RATE2#define SINGLE 17850 n);scanf(%d,&num);switch(num)case 1:tax_break=SINGLE;break;case 2:tax_break=HOST;break;case 3:tax_break=MAR_SHA;break;case 4:tax_brea

30、k=MAR_DEV;break;case 5:printf(quit.n);return 0;default:printf(Please input right number.);goto printpart;lf.n,tax);printf(Your next input:n);goto printpart;#include#include 】#define ARTICHOKE f/lbn,ARTICHOKE);printf(b:beet$%.2f/lbn,BEET);printf(c:carrot$%.2f/lbn,CARROT);printf(q:quit.n);while(getcha

31、r()!=n)continue;n);)return 0;f/lb weight:%.2f pounds cost:$%.2fn,ARTICHOKE,weight_artichoke,weight_artichoke*ARTICHOKE);if(weight_beet)printf(beet Price:$%.2f/lb weight:%.2f pounds cost:$%.2fn,BEET,weight_beet,weight_beet*BEET);if(weight_carrot)printf(carrot Price:$%.2f/lb weight:%.2f pounds cost:$%

32、.2fn,CARROT,weight_carrot,weight_carrot*CARROT);printf(The order cost:$%.2fn,veg_cost);if(discount)printf(You have%.f discount,and the reduced money is$%.2fn,。DISCOUNT_RATE*100,discount);printf(The packing and transpoting fee is$%.2fn,pack_tran_fee);printf(The total cost is$%.2fn,total_cost);#includ

33、e int main(void)int ch;int count=0;。while(ch=getchar()!=EOF)count+;printf(The number of characters is%dn,count);return 0;2.#include#define SPACE 32#define CTRL 64#define COL 10#include#include int main(void)int lower=0,upper=0;char ch;printf(Input some texts:n);while(ch=getchar()!=EOF)if(islower(ch)

34、！lower+;if(isupper(ch)upper+;printf(lower:%d,upper:%dn,lower,upper);return 0;.4.#include#include int main(void)char ch;（int inword=0;f.n,(double)chars/(double)words);return 0;5.#include#define LOW 1 I will try to guess,LOW,HIGH);printf(it.nRespond with a y if my guess is right,with an s if itn);prin

35、tf(is small and with a b if it is big.n);printf(Uh.is your number%dn,guess);while(response=getchar()!=y)if(response=s)low=guess;guess=(guess+high)/2;else if(response=b)high=guess;，guess=(guess+low)/2;else printf(Sorry,I understand only y,s and b.n);printf(Well,then,is it%dn,guess);#include#include c

36、har get_first(void);int main(void)char ch;while(ch=get_first()!=EOF)putchar(ch);printf(n);%return 0;char get_first(void)char ch;while(isspace(ch=getchar().continue;while(getchar()!=n)continue;return ch;【7.#include#define BASE1#define BASE2#define BASE3#define BASE4 n);break;,if(choice=a&choice=d)cal

37、culate(base);return 0;】lfnYour tax is$%.2lfn Your net income is$%.2lfn,gross,tax,(gross-tax);printf(n);#include float get_float(void);。char get_choice(void);char get_first(void);int main(void)char choice;float num1,num2;while(choice=get_choice()!=q)printf(Enter first number:);num1=get_float();printf

38、(Enter second number:);num2=get_float();switch(choice)￥case a:printf(%.2f+%.2f=%.2fn,num1,num2,num1+num2);break;case s:printf(.2%f-%.2f=%.2fn,num1,num2,num1-num2);break;case m:printf(%.2f*%.2f=%.2fn,num1,num2,num1*num2);】break;case d:if(!num2)printf(Enter a number other than 0:);num2=get_float();pri

39、ntf(%.2f/%.2f=%.2fn,num1,num2,num1/num2);break;default:printf(Program error!n);break;printf(Bye.n);return 0;add,s.subtract);printf(%-36s%sn,m.multiply,d.divide);printf(q.quitn);ch=get_first();while(ch!=a&ch!=s&ch!=m&ch!=d|&ch!=q)printf(Please enter a,s,m,d or q.n);ch=get_first();return ch;?n);printf

40、(Please enter a number,such as,or 3:);while(getchar()!=n)continue;return input;?#include double min(double x,double y);int main(void)double num1,num2;|printf(Enter two numbers:);scanf(%lf%lf,&num1,&num2);printf(The smaller one is:%fn,min(num1,num2);return 0;double min(double n1,double n2)return(n1 n

41、2 n1:n2);2.#include void chline(char ch,int i,int j);int main(void)int row,col;char ch;printf(Input a character you want to print:);ch=getchar();printf(Input the number of rows and columns:);scanf(%d%d,&row,&col);:chline(ch,row,col);return 0;void chline(char ch,int i,int j)int row,col;for(row=1;row=

42、i;row+)for(col=1;col=j;col+)putchar(ch);putchar(n);return;4.#include double har_mean(double num1,double num2);int main(void)、double num1,num2;printf(Enter two numbers:);scanf(%lf%lf,&num1,&num2);printf(The harmonic mean is:%fn,har_mean(num1,num2);double har_mean(double num1,double num2)）return 1/(1/

43、num1+1/num2);5.#include void larger_of(double*x,double*y);int main(void)double num1,num2;printf(Input two numbers:);scanf(%lf%lf,&num1,&num2);printf(Originally,num1=%f,num2=%fn,num1,num2);larger_of(&num1,&num2);】printf(Now,num1=%f,num2=%fn,num1,num2);return 0;void larger_of(double*x,double*y)*x *y (

44、*y=*x):(*x=*y);6.#include void sort(double*x,double*y,double*z);int main(void)double num1,num2,num3;printf(Enter 3 numbers:);scanf(%lf%lf%lf,&num1,&num2,&num3);printf(Originallynnum1=%.2f,num2=%.2f,num3=%.2fn,num1,num2,num3);sort(&num1,&num2,&num3);printf(Nownnum1=%.2f,num2=%.2f,num3=%.2fn,】num1,num

45、2,num3);return 0;void sort(double*x,double*y,double*z)double temp;if(*y *x)temp=*y;*y=*x;*x=temp;if(*z *x),temp=*z;*z=*x;*x=temp;if(*z *y)temp=*z;*z=*y;。*y=temp;7.#include#include int get_ch(char ch);int main(void)char ch;printf(Input some texts:n);while(ch=getchar()!=EOF)printf(%d,get_ch(ch);#retur

46、n 0;int get_ch(char ch)if(isalpha(ch)return tolower(ch)-a+1;else；return-1;8.#include double power(double n,int p);int main(void)double x,xpow;int exp;printf(Enter a number and the interger power(q to quit):n);while(scanf(%lf%d,&x,&exp)=2)xpow=power(x,exp);：printf(%.3g to the power%d is%gn,x,exp,xpow

47、);printf(Enter the next pair of numbers or q to quit.n);printf(Bye.n);double power(double n,int p)int count;double pow=1;if(p=0)if(n=0)pow=1;printf(It is not defined,so the value is treated as 1n);else pow=1;else if(p 0)for(count=0;count p;count-)pow/=n;else pow=0;return pow;%9.#include double power

48、(double n,int p);int main(void)double x,xpow;int exp;printf(Enter a number and the interger power(q to quit):n);while(scanf(%lf%d,&x,&exp)=2)xpow=power(x,exp);printf(%.3g to the power%d is%gn,x,exp,xpow);printf(Enter the next pair of numbers or q to quit.n);printf(Bye.n);double power(double n,int p)

49、int count;double pow;if(p 0)pow=n*power(n,p-1);else if(p 0)if(n!=0)pow=/n)*power(n,p+1);else pow=0;else pow=1;return pow;10.#include void to_base_n(unsigned long n,unsigned int base);int main(void)unsigned long num;unsigned int base;printf(Enter an integer and the base from 2 to 10(q to quit):);whil

50、e(scanf(%lu%u,&num,&base)=2)printf(Equivalent number on the base of%u:,base);to_base_n(num,base);printf(nEnter your next pair of numbers(q to quit):);printf(Done.n);return 0;void to_base_n(unsigned long n,unsigned int base)int r;）r=n%base;if(n=base)to_base_n(n/base,base);printf(%d,r);11.$#include un