c语言程序设计(科学出版社)课后习题解答

1、第3章习题解答c语言程序主要由预处理命令、函数、注释等组成。填空分号mainstdio.h3.源程序：#mcludemain()*printfCHelloWorldpriiitf(t4.源程序：#includemain()inta,b,c;/*定义变量*/scanf(%d”,&a);/*输入第一个整数*/scanf(%d”，&b);/*输入第二个整数*/c=a-b;/*计算差*/printf(“d-%d=%d”,a,b,c);/*输出结果*/5.x=10;pnntf(s=%dii,s);第2章1.cabgadeda.5b.295c.4d.29e.9a.x=4,y=6b.x=4、y=3f.x=3

2、,y=6165.iiicludemain()iiita、b,c;scanf(H%d%d,&a,&b);c=a*b;printf(,%d*%d=%d,a5b.c);第3章1.(i)ba)bdTOC o 1-5 h zab2.&a、&b1,spmitf(“x=%.2f；y=%.2fW：x,y);4.iiicludemain()iiitnum!,nuni2jiuin3.sum;floataverage;scanf(n%d%d%d,&numl,&num2,&num3);sum=num1+nuni2+num3;average=sunV3.0;prmtf(nsum=%d,average=%.2fai,su

3、m,average);5.iiicludemain()iiithoui;niiiiute,second,total;/*定义变量代表时、分、秒和总秒数*/scanf(H%d,&total);houi-total/3600;iiunute=total%3600/60;second=total%3600%60;prmtf(%dhours:%dinniutes:%dsecondsn,houLniinute,second),第4章1.TOC o 1-5 h zbbbb2.03.(1)64114.样includemain()mtx，y;scanf(”cT,&x);if(x-5&x0&x10)v=2*x+

4、l;JpnntfCx=%d,y=%diT,x、y);5#includemain()mtscore,raiik;严score表示成绩ank表不级别*/prmtffTleaseinputscoie:H);scanfC%dS&scoie);raiik=scoie/10;switch(raiik)case10:case9:pnntf(”成绩等级为：An“)；break;case8:pnntfC成绩等级为：Bn);break;Ciin);break;DnH);break;EnH);break;Ciin);break;DnH);break;EnH);break;6.#iiicludevoidmain()i

5、iitn;printfCPleaseinputthedigit:)；scanf(”d役&n);switch(n)casel:piintfpJcmir);beak;case2:prmtf(,TebiiH);break;case3:prmtf(MMarnn);break;case4:prmtf(MAprii);bieak;case5:prmtf(MMaynn);break;case6:prmtf(MJunnM);break:case7:prmtf(MJulnM);break;case8:prmtf(MAgunH)；bieak;case9:prmtf(MSepiiH);break;case10:pr

6、mtf(HOctnH);bieak;case11:pimtf(,rNovnn);break;case12:printf(DecnH);break;第5章1.(l)bab(4)ddTOC o 1-5 h z7,1y=-lm=610,1435ABABCDCD9.OTlaOT(0HiY.LQqu父pmdurQSC2d)七mdoHmns】.3K二utbnUOI)OUTeluAqoTplsvQpnIOUT#0T(Yumsp-*H00e+9+寸+G)Jwndil+UTns(eHoOEf)尼oHums主UOIrUT)()UTUUI人qoTplsvQPaOUT%()UTUlucq.2plsvQpnoUTlt:

7、Y?SMJCqoa)usia)93689C5。(寸)P2qapa)冊9垛(Ums:p*=muwdfloatsum=0,average;for(i=0;i10:i+)pnntf(Ma%d=?,4);scanf(H%f&ai);sum+=ai;average=sunV10;prmtf(naveiageis%.2fui,average);9.#includedefineN10main()mtaN4Jaigetfound;for(i=0;iN;i+)scanf(”d”,&ai);pnntfCTleasemputanumbe匸J;scanf(n%dH,&target);1=0；wliile(iN&tar

8、get!=ai)i+;found=pimtf(n%dnfound);10.#include#defineN80main()chaistiN;iiitlen=0j=0;prmtf(,Pleaseinputastiing:);gets(str);wlule(stri+!=0)len+;pnntf(Mthelengthofstrmgis%d.nMJen);第7章1.2113616(1)hmc(2)m+5.9163232,5,1,2,3,-2main()iiita,b,cjnax;pnntf(MPleasemputtlueenumbers/*);scanf(H%d%d%d*&a,&b,&c);niax

9、=fun(a,b,c);pnntf(MMaxis%d.irmax);mtfiin(intajntbjntc)iiitmax;niax=ab?(ac?a:c):(bc?b:c);returnmax;9.#includelongiiitsum(intn);main()iiitn;scanf(”d役&n);prmtf(HSum=%ld.ii,sum(n);longiiitsum(intn)if(n=1)return1;elsereturnsuni(n-l)+n;10#includevoidfiin(n);main()iiitn;scanf(”d役&n);firn(n);9寸cne寸68Z.9S寸3心

10、8nOSX寸)qspaqs二3二耳贾)七冃dh/usyDSPamp】(0HHu)七寸f(X)(x)dDITIPP甘q(x)*(x)*(x)(x)d当七畀d二W6躲宀(=权回哄=权回瞰氐二zdvK)snd-(!*煤uvsT(ids)u2us+i3SHedHSHTdosstOD“严二d*ERO8WSER)OUTUluAq.msidsvQpao.s非cq.oTplsvQpao.s非0TumsHd6eqppoq8uqL9寸cn2T9c.defineF(x,v)(x)*(v)100?l:02.TOC o 1-5 h z44defineDOUBLE(x)2*(x)d-20Nisundefined7.5v=

11、6Ja=b;b=temp;main()intx，y;pnntfCx=?J;scanf(”d役&x);prmtf(Hy=?H);scanf(”d役&y);SWAP(x,y)priiitf(nx=%d,y=%d.n,x,y)；第10章1.stmctstudentiiitsno;chaisname10;chaisex;stul,stu2;12合法的有a,b,dc.改成s.u.rectangle.length=25;e.改成s.u.ciicle.radius=5;f改成s.u.ciicle.radius=5;a,b,c,d(说明：变量b有确定的值之后，b+是合法的。)改为tvpedefstmctpro

12、ductcharname10;floatprice;PRODUCT;PRODUCTpioducts10;6.stmctemployeeprintemp(emp)7.24398mtniniute;iiitsecond;main()stmcttunestiucttime;pnntf(MIiiputtmie?i(Exainple18:28:38)iiH);scanf(”(i%ck%d”、&tmehoi】&meminu&tim亡.second);pnntfCTimeis%d:%d:%dnH,time.hoin;tmie.nuniiteJime.second);9.#includestmcttimjst

13、ructiiithour;mtniniute;iiitsecond;time;voidenteoiineQ;voiddisplay_tiineO;main()enter_tiine();display_tiine();voidenteoiineQpnntf(MEnterthetiine(example18:28:38)?);scanf(”(i%ck%d”、&tmehoi】&meminu&tim亡.second);voiddisplay_tiineQpnntfCTimeis%d:%d:%d.,di,time.houi;time.niHiutejune.second);10.include#def

14、ineN3stmcthotelchainame31;/*旅馆名称chaiaddress31jy*旅馆地址*/intgrade;/*旅馆级别*/floataverage_charge;/*平均房价*/intnumber;/*房间数量*/hN=hl”,”上海路”,5,50000.80,”h2”,”北京大街”,5,480.00,70,113T南京大街3300.50,100;main()iiitgiadej;pimtfC请输入级别(3-5)?”)；scanf(H%dH,&grade);for(i=0;iN;i+)if(hi.grade=grade)pimtfC名称:sn地址:sn级别:dn平均房价.2

15、坯房间数量:dn”,Jii.addiess,hi.grade,hi.aveiage_charge,hi.number);第11章1.(l)cdb(4)bbBasicaiifgetc(fp)4record.dafW5.includeincludeincludetvpedefstmctEmployeemtid;chainame20;chaigendei20;intage;chaiaddress20;JEmployee;mtmaiii(void)FILE*fp;chaianothei;choice;Employeeemp;longintrecsize;fp=fbpen(Hemploye

16、e.dat，7rrb+H)；if(fp=NULL)fp=fbpen(,employee.dat,Hwb+H);if(fp=NULL)prmtf(nCairtOpenFile);exit(O);recsize=sizeof(emp);wlule(l)pnntf(l.添加记录2.显示男员丁3.退出n);printf(MEnteryourchoice(l-3):n);fflush(stdin);scanfC%c”、&choice);switch(choice)case,l,:fseek(fp.O,SEEK_END);anothe尸Y；wliile(anotliei-=,Y,|aiiothei-=y)

17、prmtfC输入信息(id姓名性别年龄住址):5”)；scanf(%d%s%s%d%s,&emput&empiKmi匕&亡mp.g亡nd；&亡mp.ag&emp.addess);fvrite(&empecsizeJ,fp);pnntf(”是否继续(Y/N):”)；fflush(stdin);another=getcharQ;break;case2:pnntf(”学号t姓名t性别t年龄t住址n”)；rewiiid(fp);wliile(fiead(&empjecsizu,fp)=1)if(strcmp(emp.gender/男”)=0)piintfC%dt%st%st%dt%sn,emp.id,

18、emp.naine,emp.gendei;emp.age,emp.addiess);break;case3*:fclose(fp);exit(0);6.includeHstdio.h,rmcludeHstdlib.hHdefineM2#definestustiuctstudentiiitnum;chainame20;floatsi;floats2;floats3;floatavg;main()stustM;FILE*fp:mti;pnntfCiW输入5名同学生的成绩，按照学号，姓名，成绩1,成绩2,成绩3的顺序，中间用空格隔开:n”)；fdr(i=0;iM;i+)scanf(H%d%s%f%f%f&sti.nunLS.&sti.sl.&sti.s2.&s