C PRIMER PLUS 第七八正确答案Word文档下载推荐.docx

1、n return 0;PE 7-2 int count = 0;inuput a string,and this program will out it and ASCII n（# to quit）.n if（ch = ） printf（ninput another string（# to quit）: n continue; while （count = 8） count = 0; printf（%c,%d ,ch,ch）; count+;nBye!PE 7-3int main（void） int n; double sumeven = 0.0; int ct_even = 0; doubl

2、e sumodd = 0.0; int ct_odd = 0; while （scanf（%d, &n） = 1 & n != 0） if （n % 2 = 1） sumodd += n; +ct_odd; else sumeven += n; +ct_even;Number of evens: %d, ct_even）; if （ct_even 0） average: %g, sumeven / ct_even）; putchar（Number of odds:, ct_odd）; if （ct_odd , sumodd / ct_odd）;ndonenPE 7-4 int ex_c,pe_

3、c; ex_c = pe_c = 0;inuput a string,and this program will switch . to ! and ! to ! n（# to quit）.n. pe_c+; else if （ch = ex_c+;%c,ch）;nthere are %d pe switching and %d ex switching,pe_c,ex_c）;PE 7-5 int ct1 = 0; int ct2 = 0; switch（ch） case : +ct1; break; +ct2; default : putchar（ch）;%d replacements of

4、 . with !, ct1）;%d replacements of ! with !, ct2）;PE 7-6int main （void） int e_c,i_c,st_c; e_c = i_c = st_c = 0;input your string and this program will output the countn（# to quit）: while（ch = getchar（） !） /当输入ei 时 st_c =10,i_c = 10 if（ch !i） /当输入ie时st_c =10,i_c =1,输入其他字符st_c = 2 st_c = 2; if（ch = e

5、st_c = 10; i_c = 1; i_c = 10; if（st_c = i_c） /防止eii的bug e_c+; st_c = 1;nthere is %d ei in your string!nbye!,e_c）;PE 7-7#define BASEPAY 10 /* $10 per hour */#define BASEHRS 40 /* hours at basepay */#define OVERTIME 1.5 /* 1.5 time */#define AMT1 300 /* 1st rate tier */#define AMT2 150 /* 2st rate tie

6、r */#define RATE1 0.15 /* rate for 1st tier */#define RATE2 0.20 /* rate for 2nd tier */#define RATE3 0.25 /* rate for 3rd tier */ double hours; double gross; double net; double taxes;Enter the number of hours worked this week: scanf（%lfhours）; if （hours = BASEHRS） gross = hours * BASEPAY; gross = B

7、ASEHRS * BASEPAY + （hours - BASEHRS） * BASEPAY * OVERTIME; if （gross = AMT1） taxes = gross * RATE1; else if （gross int main（void） int choose; int test = 1;*nEnter the number corresponding to the desired pay rate or action:1） $8.75/hrtt2） $9.33/hrn3） $10.00/hrtt4） $11.20/hrn5） quitn while（ （scanf（,&c

8、hoose） = 1） switch（choose） case 1: hours = 8.75; break; case 2: hours = 9.33; case 3: hours = 10.00; case 4: hours = 11.20; case 5: test = 0; default: test = 2; printf（error! try again: if（test = 2） test = 1; if（test = 1 ） if （hours gross = hours * BASEPAY; else gross = BASEHRS * BASEPAY + （hours -

9、BASEHRS） * BASEPAY * OVERTIME; if （gross taxes = gross * RATE1; else if （gross for （num = 2; num = lim; num+） for （div = 2, prime = YES; （div * div） = num; div+） if （num % div = 0） prime = NO; /* number is not prime */ if （prime = YES）%ld is prime.n, num）;Please enter another limit;PE 7-11 const dou

10、ble price_artichokes = 1.25; const double price_beets = 0.65; const double price_carrots = 0.89; const double DISCOUNT_RATE = 0.05; double lb_artichokes; double lb_beets; double lb_carrots; double lb_total; double cost_artichokes; double cost_beets; double cost_carrots; double cost_total; double fin

11、al_total; double discount; double shipping;Enter a to buy artichokes, b for beets, c for carrots, q to quit:q & ch !Q if （ch = continue; while （getchar（） ! ch = tolower（ch）; switch （ch）aEnter pounds of artichokes:lb_artichokes）;bEnter pounds of beets:lb_beets）;cEnter pounds of carrots:lb_carrots）;%c

12、 is not a valid choice.n cost_artichokes = price_artichokes * lb_artichokes; cost_beets = price_beets * lb_beets; cost_carrots = price_carrots * lb_carrots; cost_total = cost_artichokes + cost_beets + cost_carrots; lb_total = lb_artichokes + lb_beets + lb_carrots; if （lb_total shipping = 0.0; else i

13、f （lb_total 100.0） discount = DISCOUNT_RATE * cost_total; discount = 0.0; final_total = cost_total + shipping - discount;Your order:%.2f lbs of artichokes at $%.2f per pound:$ %.2fn, lb_artichokes, price_artichokes, cost_artichokes）;%.2f lbs of beets at $%.2f per pound: lb_beets, price_beets, cost_b

14、eets）;%.2f lbs of carrots at $%.2f per pound: lb_carrots, price_carrots, cost_carrots）;Total cost of vegetables:, cost_total）; 100）Volume discount:, discount）;Shipping:, shipping）;Total charges:, final_total）;Chapter 8PE 8-1/Ctrl + z 结束文件 int ch; int ct = 0;= EOF） ct+;%d characters readn, ct）;PE 8-3

15、/* Programming Exercise 8-3 */* Using ctype.h eliminates need to assume ASCII coding */ int uct = 0; int lct = 0; if （isupper（ch） uct+; else if （islower（ch） lct+;%d uppercase characters readn, uct）;%d lowercase characters readn, lct）;/* or you could use if （ch A ch z*/PE 8-5/* Programming Exercise 8-5 */* binaryguess.c - an improved number-guesser */ int high = 100; int low = 1; int guess = （high + low） / 2; char response;Pick an integer from 1 to 100. I will try to guess it.nRespond with a y if my guess is right, withna h if it is high, and with an l if it is low.nUh.is your number