CPrimerPlus第六版中文版习题答案

1、C Primer Plus第六版中文版习题答案Github: HYPERLINK /zhayujie/C-Primer-Plus /zhayujie/C-Primer-PlusEmail: 第一章1.#include int main(void) double inch, cm; printf(Please input the inches: ); scanf(%lf, &inch); cm = inch * 2.54; printf(%g cmn, cm); return 0;第二章3.#includeint main(void) int days,years=21; days=years*

2、365; printf(我的年龄是%d岁，%d天n,years,days); return 0;4.#includevoid 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.#includevoid br(void);void ic(void);int main(void) br(

3、); printf(,); ic(); printf(n); ic(); printf(n); br(); printf(n); return 0;void br(void) printf(Brazil,Russia);void ic(void) printf(India,China);6.#includeint 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

4、.#includevoid one_three(void);void two(void);int main(void) printf(starting nown); one_three();void one_three(void) printf(onen); two(); printf(threen); printf(done!n);void two(void) printf(twon);第三章2.#includeint main(void) char ch; printf(please input a number:); scanf(%d,&ch); printf(%cn,ch); retu

5、rn 0;4.#includeint main(void) float a; printf(Enter a floating-point value: ); scanf(%f,&a); printf(fixed-point notation: %fn,a); printf(exponential notation: %en,a); return 0;5.#includeint main(void) int age; double seconds; printf(please input your age: ); scanf(%d,&age); seconds=age*3.156e7; prin

6、tf(the corresponding seconds are: %en,seconds); return 0;7.#includeint main(void) float inches,cms; printf(input your height(inch): ); scanf(%f,&inches); cms=inches*2.54; printf(your height(cm): %fn,cms); return 0;8.#includeint main(void) float pint,ounce,soupspoon,teaspoon,cup; printf(input the num

7、ber of cups: ); scanf(%f,&cup); pint=cup/2; ounce=cup*8; soupspoon=ounce*2; teaspoon=soupspoon*3; printf(they are equivalent of:n%f pintn%f ouncen%f soupspoonsn%f teaspoonsn,pint,ounce,soupspoon,teaspoon); return 0;第四章1.#includeint main(void) char firstname40,lastname40; printf(Input your firstname:

8、 ); scanf(%s,firstname); printf(Input your lastname: ); scanf(%s,lastname); printf(Your name is %s,%sn,firstname,lastname); return 0;2.#include#includeint main(void) char name40; int width; printf(Input your name: ); scanf(%s,name); width=strlen(name)+3; printf(%*sn,width,name); /输入的名和姓中间不能分隔 return

9、 0;4.#includeint 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 %.3fm talln,name,height); return 0;5.#includeint main(void) float speed,size,time; printf(Input the download speed(Mb/s) and the file size(

10、MB):n); scanf(%f%f,&speed,&size); time=size/speed*8.0; printf(At %.2f megabits per second, a file of %.2f megabytesn,speed,size); printf(downloads in %.2f seconds.n,time); return 0;6.#include#includeint main(void) char firstname40,lastname40; printf(Input your firstname: ); scanf(%s,firstname); prin

11、tf(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,firstname,lastname); printf(%*d %*dn, -strlen(firstname),strlen(firstname),-strlen(lastname),strlen(lastname); retur

12、n 0;7.#include#includeint main(void) double a=1.0/3.0; float b=1.0/3.0; printf(%.6f %.6fn,a,b); /左侧double型 右侧float型 printf(%.12f, %.12fn,a,b); printf(%.16f, %.16fn,a,b); printf(DBL_DIG: %dn,DBL_DIG); printf(FLT_DIG: %dn,FLT_DIG); return 0;8.#include#define GALLON 3.758 /1 gallon=3.785 liters#define

13、MILE 1.609 /1 mile=1.609 kilometersint main(void) float gallon,mile; printf(Input miles and gallons: ); scanf(%f%f,&mile,&gallon); printf(Miles per gallon: %.1fn,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 /1h=60minint

14、main(void) int hour,min,left; printf(Enter the number of minutes: ); scanf(%d,&min); while(min0) hour=min/H_P_M; left=min%H_P_M; printf(%d minutes is %d hours and %d minutes.n,min,hour,left); printf(Enter your next value: ); scanf(%d,&min); printf(Good bye!n); return 0;2.#includeint main(void) int n

15、um,count; printf(Input a integer: ); scanf(%d,&num); count=0; while(count+11) printf(%d ,num); num+; printf(n); return 0;3.#include#define DAYS_PER_WEEK 7 /一周7天int main(void) int day,week,left; printf(Input the number of days: ); scanf(%d,&day); while(day0) week=day/DAYS_PER_WEEK; left=day%DAYS_PER_

16、WEEK; printf(%d days are %d weeks, %d days.n,day,week,left); printf(Next input: ); scanf(%d,&day); return 0;4.#include#define CM_PER_FEET 30.48 /1feet=30.48cm#define CM_PER_INCH 2.54 /1inch=2.54cmint main(void) int feet; float cm,inch; printf(Enter a height in centimeters: ); scanf(%f,&cm); while(cm

17、0) feet=(int)(cm/CM_PER_FEET); inch=(cm-feet*CM_PER_FEET)/CM_PER_INCH; printf(%.1f cm = %d feet, %.1f inchesn,cm,feet,inch); printf(Enter a height in centimeters (=0 to quit): ); scanf(%f,&cm); printf(byen); return 0; 5.#includeint main(void) int count,sum,days; printf(Input the number of days: ); s

18、canf(%d,&days); count=sum=0; while(count+days) sum=sum+count; printf(The money you earned: %dn,sum); return 0;6.#includeint main(void) int count,sum,days; printf(Input the number of days: ); scanf(%d,&days); count=sum=0; while(count+days) sum=sum+count*count; printf(The money you earned: %dn,sum); r

19、eturn 0;7.#includevoid 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.#includeint main(void) int num1,num2; printf(This program computes moduli.n); printf(Enter an integer to serve as the seco

20、nd 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(Donen);9.#includevoid Temperatures(double fah);int main(void) double f

21、ah,cel,kel;/华氏温度，摄氏温度，开氏温度 printf(Input the Fahrenheit temperature: ); while(scanf(%lf,&fah)=1) Temperatures(fah); printf(Next input: ); printf(Done.n);void Temperatures(double fah) const double a=5.0,b=9.0,c=32.0,d=276.13; printf(%.2f is %.2f , %.2f K.n, fah,a/b*(fah-c),a/b*(fah-c)+d);第六章1.#include

22、#define SIZE 26int main(void) char chSIZE; int index; for(index=0;indexSIZE;index+) chindex=a+index; printf(%c ,chindex); printf(n); return 0; 2.#includeint main(void) int i,j; for(i=1;i=5;i+) for(j=1;j=i;j+) printf($); printf(n); return 0;3.#includeint main(void) int i,j; for(i=1;i=6;i+) for(j=0;ji

23、;j+) printf(%c,F-j); printf(n); return 0;4.#include#define ROWS 6int main(void) char ch; int i,j; for(ch=A,i=0;iROWS;i+) for(j=0;j=i;j+) printf(%c,ch+); printf(n); return 0;5.#include#define ROWS 5int 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-) p

24、rintf(%c,ch+j); printf(n); return 0;6.#includeint main(void) int max,min,num; printf(Input the min and max: ); scanf(%d%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./与题目不同 打印的是句子#include#include#define SIZ

25、E 40int main(void) int i,index=-1; char chSIZE; printf(Input a word: ); do index+; scanf(%c,&chindex); while(chindex!=n); for(i=index+1;i=0;index-) printf(%c,chindex); printf(n); return 0;8.#includeint main(void) double n1,n2; printf(Input two numbers: ); while(2=scanf(%lf%lf,&n1,&n2) printf(%fn,(n1

26、-n2)/n1*n2); printf(Input your next pair of numbers: ); printf(Bye!n); return 0;9.#includedouble calculate(double n1, double n2);int main(void) double num1, num2; printf(Input two numbers: ); while (2 = scanf(%lf%lf, &num1, &num2) /输入两个浮点数 printf(%fn, calculate(num1, num2); /函数调用 printf(Input your n

27、ext pair of numbers: ); printf(Bye!n); return 0;double calculate(double n1, double n2) return (n1 - n2) / (n1 * n2); /返回运算结果10.#include int main(void) int lower, upper; int num, sum; printf(Enter lower and upper integer limits: ); scanf(%d%d, &lower, &upper); while (lower upper) for (sum=0, num=lowe

28、r; num = upper; num+) sum = sum + num * num; /计算平方和 printf(The sums of the squares from %d to %d is %dn, lower * lower, upper * upper, sum); /输出结果 printf(Enter next set of limits: ); scanf(%d%d, &lower, &upper); /下一次输入 printf(Donen); return 0; 11.#include #define SIZE 8int main(void) int numSIZE; in

29、t index; printf(Enter 8 integers: ); for (index=0; index= 0; index-) /倒序输出 printf(%d , numindex); printf(n); return 0;12.#include int main(void) double sum1=0, sum2=0; int count, items, sign; printf(Enter the items: ); scanf(%d, &items); /输入序列的项数 for (count=1, sign=1; count = items; count+, sign *=

30、-1) sum1 += 1.0 / count; sum2 += 1.0 * sign / count; /分别计算两序列的和 printf(1.0 + 1.0/2.0 + 1.0/3.0 + 1.0/4.0 + . = %fn, sum1); printf(1.0 - 1.0/2.0 + 1.0/3.0 - 1.0/4.0 + . = %fn, sum2); return 0;13.#include #define SIZE 8int main(void) int index, count, numSIZE; for (index = 0, count = 1; index SIZE; in

31、dex+) count *= 2; numindex = count; /for循环将数组元素设为2的前8次幂 index=0; /初始化index的值 do printf(%d , numindex+); while (index SIZE); /do while循环显示数组元素的值 printf(n); return 0;14.#include #define SIZE 8int main() double num1SIZE, num2SIZE; int index1, index2, index; printf(Enter 8 numbers to the first array:n);

32、 for (index1 = 0; index1 SIZE; index1+) scanf(%lf, &num1index1);/向第一个数组输入8个数 num20 = num10; for (index1 = 1, index2 = 1; index1 SIZE; index1+, index2+) num2index2 = num2index2-1 + num1index1; /为第二个数组赋值（是第一个数组对应的元素之和） printf(The first array: ); for (index=0; index SIZE; index+) printf(%6.2f, num1inde

33、x); /输出第一个数组的内容 printf(nThe second array: ); for (index=0; index SIZE; index+) printf(%6.2f, num2index);/输出第二个数组的内容 printf(n); return 0;15.#include #include #define SIZE 255int main(void) int index; char chSIZE; printf(Enter a line: ); for(index = 0, scanf(%c, &ch0); chindex != n;) index+; scanf(%c,

34、 &chindex); /输入内容到字符数组中,回车时结束 for(index += 1; index =0; index-) printf(%c, chindex);/倒序输出内容 printf(n); return 0;16.#include #define RATE_DAPHNE 0.1#define RATE_DEIRDRE 0.05/两人的利率#defineMONEY 100int main(void) int year; double daphne = MONEY, deirdre = MONEY;/两人的初始投资额相同 for (year = 1; daphne = deirdr

35、e; year+) daphne += MONEY * RATE_DAPHNE; deirdre += deirdre * RATE_DEIRDRE; /计算Deirdre投资额超过Daphne需要的年数和当时的金额 printf(After %d year, Deirdres investment will be more than Daphnes,n Daphnes investment will be $%lf,nand Deirdres investment will be $%lf.n, year, daphne, deirdre);/输出结果 return 0; 17.#inclu

36、de #define INITIAL_MONEY 100/账户初始金额为100万元#define ANNUAL_RATE 0.08/年利率为8%int main(void) int year; double money; for(year = 1, money=INITIAL_MONEY; money0; year+) money += money * ANNUAL_RATE - 10;/计算每年年终的账户余额 printf(After %d years, Chuckie will draw all money from his account.n, year); return 0;18.#i

37、nclude #defineINITIAL_NUMBER 5 /初始朋友数为5人#define DUNBAR_NUMBER 150 /邓巴数int main(void) int week; int number = INITIAL_NUMBER; for (week = 1; number = DUNBAR_NUMBER; week+) number = (number - week) * 2;/计算每周的朋友数量 printf(After %d week, the number of Rabnuds friends is %dn, week, number); return 0; 第七章1.

38、#include int main(void) char ch; int n_space = 0;/空格数 int n_newline = 0;/换行数 int n_others = 0;/其他字符数 printf(Enter some text; Enter # to quit.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_newl

39、ine, n_others); return 0;2.#include #define CHARS_PER_LINE 8/每行字符数int main(void) char ch; int n_chars = 1;/字符数 printf(Enter some characters(# to quit):n); while (ch = getchar() != #) printf(%3c(%3d) , ch, ch); if (n_chars+ % CHARS_PER_LINE = 0) printf(n); printf(n); return 0;3.#include int main(void

40、) int num; int n_even = 0, n_odd = 0;/偶数和奇数个数 int sum_even = 0, sum_odd = 0;/偶数和奇数和 printf(Enter some integers(0 to quit):n); scanf(%d, &num); while (num != 0) if (num % 2 = 0) n_even+; sum_even += num; /计算偶数个数和偶数和 else n_odd+; sum_odd +=num; /计算奇数个数和奇数和 scanf(%d,&num); printf(The number of even num

41、bers is %d, and the everage of even numbers is %.2fn, 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; /

42、替换次数 printf(Enter some texts(# to quit):n); while (ch = getchar() != #) if (ch = .) ch = !; n_repl+; /替换句号 else if (ch = !) printf(!); n_repl+; /替换感叹号 printf(%c, ch); printf(n%d substitutions were made.n, n_repl); return 0;5.#include int main(void) char ch; int n_repl = 0;/替换次数 printf(Enter some tex

43、ts(# to quit):n); while (ch = getchar() != #) switch (ch) case .: ch = !; n_repl+; break; case !: printf(!); n_repl+; break; default: break; /利用switch语句进行替换 printf(%c,ch); printf(n%d substitutions were made.n, n_repl); return 0;6.#include int main(void) char ch; char last_ch = 0; /前一个字符 int count=0;

44、 printf(Enter some texts(# to quit):n); while (ch = getchar() != #) if (ch = i) & (last_ch = e) count+; last_ch = ch;/出现ei时，计数+1 printf(ei appeared %d times.n, count); return 0;7.#include #define BASE 1000/基本工资 100美元/h#define TIME 40/超过40h为加班#defineMUL1.5/加班时间算作平时的1.5倍#defineRATE1 0.15/前300美元的税率#def

45、ine RATE2 0.2/300-450美元的税率#define RATE3 0.25/大于450美元的税率#define BREAK1 300/税率的第一个分界点#define BREAK2 450/税率的第二个分界点int main(void) double hour, tax, gross; printf(Input your work hours in a week: ); scanf(%lf, &hour); if (hour = TIME) gross = hour * BASE; else gross = TIME * BASE + (hour - TIME) * MUL *

46、BASE; /计算总收入 if (gross = BREAK1) tax = gross * RATE1; else if (gross = BREAK2) tax = BREAK1 * RATE1 + (gross - BREAK1) * RATE2; else tax = BREAK1 * RATE1 + (BREAK2 - BREAK1) * RATE2 + (gross - BREAK2) * RATE3; /计算税金 printf(Your gross income is $%.2lfnYour tax is $%.2lfn Your net income is $%.2lfn, g

47、ross, tax, (gross - tax); return 0;8.#include #define BASE1 8.75#define BASE2 9.33#define BASE3 10.00#define BASE4 11.20/四种等级的基本工资#define TIME 40/超过40h为加班#defineMUL1.5/加班时间算作平时的1.5倍#defineRATE1 0.15/前300美元的税率#define RATE2 0.2/300-450美元的税率#define RATE3 0.25/大于450美元的税率#define BREAK1 300/税率的第一个分界点#defi

48、ne BREAK2 450/税率的第二个分界点int main(void) double base, hour, tax, gross; int count, num; const int LENGTH = 65;/*的长度 printpart: for (count = 0; count LENGTH; count+) printf(*); printf(nEnter the number corresponding to the desired pay rate or action:n); printf(%-36s%s,1) $8.75/hr, 2) $9.33/hrn); printf(

49、%-36s%s,3) $10.00/hr, 4) $11.20/hrn); printf(%sn, 5) quit); for (count = 0; count LENGTH; count+) printf(*); printf(n); /打印表格 while (scanf(%d, &num) = 1) switch (num) case 1:base = BASE1; break; case 2: base = BASE2; break; case 3: base = BASE3; break; case 4: base = BASE4; break; case 5: printf(qui

50、t.n); return 0; default: printf(Please input the right option.n); goto printpart; /选择基本工资等级 printf(Input your work hours in a week: ); scanf(%lf, &hour); if (hour = TIME) gross = hour * base; else gross = TIME * base + (hour - TIME) * MUL * base; /计算总收入 if (gross = BREAK1) tax = gross * RATE1; else

51、if (gross = BREAK2) tax = BREAK1 * RATE1 + (gross - BREAK1) * RATE2; else tax = BREAK1 * RATE1 + (BREAK2 - BREAK1) * RATE2 + (gross - BREAK2) * RATE3; /计算税金 printf(Your gross income is $%.2lfnYour tax is $%.2lfn Your net income is $%.2lfn, gross, tax, (gross - tax); printf(nYour next choice:n); retu

52、rn 0;9.#include int main(void) int div, prime; int num, count; int flag; printf(Input a positive integer: ); scanf(%d, &num); printf(The prime numbers in range:n); for (prime = 2; prime = num; prime+)/外层循环显示所有素数 flag = 1; for (div = 2; (div * div) = prime; div+) if (prime % div = 0) flag = 0; /内层循环检

53、验是否为素数 if (flag)/利用标记flag判断 printf(%d ,prime); printf(n); return 0;10.#include #define RATE1 0.15#define RATE2 0.28#define SINGLE 17850/单身人群的税率分界点#define HOST 23900/户主人群的税率分界点#define MAR_SHA29750/已婚共有人群的分界点#define MAR_DEV14875/已婚离异人群的分界点int main(void) int num; double income, tax_break, tax; printpar

54、t: printf(Please enter Corresponding figures to select the typen); printf(1 single, 2 host, 3 married and shared, 4 married but devoced and 5 to quit.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_

55、break = MAR_DEV; break; case 5:printf(quit.n); return 0; default: printf(Please input right number.); goto printpart;/回到输入阶段 printf(Enter your income: );/指定种类和收入 while (scanf(%lf, &income) = 1) if (income = tax_break) tax = income * RATE1; else tax = tax_break * RATE1 + (income - tax_break) * RATE2;

56、 /计算税金 printf(The tax is $%.2lf.n, tax); printf(Your next input: n); goto printpart;/回到输入阶段 return 0; 11.#include #include #define ARTICHOKE 2.05/洋蓟2.05美元/磅#define BEET 1.15/甜菜1.15美元/磅#define CARROT 1.09/胡萝卜1.09美元/磅#defineDISCOUNT_LIMIT 100/包装费和运费打折要求订单100美元#define DISCOUNT_RATE 0.05/折扣为%5#define BR

57、EAK1 5#define BREAK2 20/装运费的分界点#defineFEE1 6.5#defineFEE2 14#define FEE3_RATE 0.5/不同重量区间的装运费，其中超过20磅的每续重一磅/增加0.5元int main(void) double weight; double weight_artichoke = 0; double weight_beet = 0; double weight_carrot = 0;/购买三种蔬菜的重量 double total_weight;/总重量 double veg_cost;/三种蔬菜总共花费 double order_cost

58、;/订单总额 double total_cost;/费用总额 double pack_tran_fee;/装运费 double discount; int count = 0; char ch; printf(Please select the vegetables you want to buy:n); printf(a: artichoke $%.2f/lbn, ARTICHOKE); printf(b: beet $%.2f/lbn, BEET); printf(c: carrot $%.2f/lbn, CARROT); printf(q: quit.n); /打印选择信息 while

59、(ch = tolower(getchar() != q) /if (ch = n) /continue;/滤掉回车 switch (ch) case a: printf(Input the weight of artichoke in pound: ); scanf(%lf, &weight); weight_artichoke += weight; count+; printf(Continue entering a, b, c or q: ); break; case b: printf(Input the weight of beet in pound: ); scanf(%lf, &

60、weight); weight_beet += weight; count+; printf(Continue entering a, b, c or q: ); break; case c: printf(Input the weight of carrot in pound: ); scanf(%lf, &weight); weight_carrot += weight; count+; printf(Continue entering a, b, c or q: ); break; default: printf(Please enter the right character.); w