C語(yǔ)言課本答案

第一早1.6mainO{inta,b,c,max；printfC'inputthreenumbers：Wn")；scanf("%d,%d,%d",&a,&b,&c)；max=a；if(max<b)max=b；if(max<c)max=c；printf("max=%d",max)；}第二章2.3(l)(10)10=(12)8=(a)16(2)(32)10=(40)8=(20)16(3)(75)10=(113)8=(4b)16(4)(-617)10=(176627)8=(fd97)16(5)(-1ll)10=(177621)8=(ff91)16(6)(2483)10=(4663)8=(963)16(7)(-28654)10=(110022)8=(9012)16aabb(8)cc(8)abc(7)AN2.7mainO{charcl='C',c2='h",c3='i",c4='n",c5='a'；cl+=4,c2+=4,c3+=4,c4+=4,c5+=4；printf("%c%c%c%c%cWn",cl,c2,c3,c4,c5)；}2.8mainO{intcl,c2；cl=97；c2=98；printf("%c%c",cl,c2)；)2.9(1)=2.5(2)=3.52.10(1)24(2)10(3)60(4)0(5)0(6)0第三章3.4mainO{inta,b,c；longintu,n；floatx,y,z；charcl,c2；a=3；b=4；c=5；x=1.2；y=2.4；z=-3.6；u=51274；n=128765；cl='a'；c2='b'；printfC'Wn")；printf("a=%2db=%2dc=%2dWn",a,b,c)；printf("x=%8.6f,y=%8.6f,z=%9.6fWn",x,y,z)；printf("x+y=%5.2fy+z=%5.2fz+x=%5.2fWn”,x+y,y+z,z+x)；printf("u=%61dn=%91dWn",u,n)；printf("cl='%c'or%d(ASCII)Wn",cl,cl)；printf("c2='%c'or%d(ASCII)Wn",c2,c2)；575767.856400,-789.12396267.856400,-789.12396267.86-789.12,67.856400,-789.123962,67.856400,-789.1239626.785640e+001,-7.89e+002A,65,101,411234567,4553207,d68765535,177777,ffff,-lCOMPUTER,COMa=3b=7/x=8.5y=71.82/cl=Ac2=a/10 20Aal.5-3.75+1.4,67.8/（空3）10（空3）20Aal.5（空l(shuí)）-3.75（空1）（隨意輸入ー個(gè)數(shù)），67.8回車3.8mainO{floatpi,h,r,l,s,sq,sv,sz；pi=3.1415926；printfC'inputr,hWn")；scanf("%f,%f",&r,&h)；l=2*pi*r；s=r*r*pi；sq=4*pi*r*r；sv=4.0/3.0*pi*r*r*r；sz=pi*r*r*h：printf("l=%6.2fWn",l)；printf("s=%6.2fWn",s)；printf("sq=%6.2fWn",sq)；printf("vq=%6.2fWn",sv)；printf("vz=%6.2fWn",sz)；)3.9main(){floatc,f；scanf("%f",&f)；c=(5.0/9.0)*(f-32)；printf("c=%5.2fWn',,c)；#include"stdio.h"mainO{charcl,c2；scanf("%c,%c",&cl,&c2)；putchar(cl)；putchar(c2)；printfC'Wn")；printf("%c%cWn",cl,c2)；}第四章(DO(2)1(3)1(4)0(5)1mainO{inta,b,c；scanf("%d,%d,%d",&a,&b,&c)；if(a<b)if(b<c)printf("max=%dWn",c)；printf("max=%dWn",b)；elseif(a<c)printf("max=%dWn",c)；elseprintf("max=%dWn",a)；)main(){inta,b,c,temp,max；scanf("%d,%d,%d",&a,&b,&c)；temp=(a>b)?a：b；max=(c>temp)?c：temp；printf("max=%d",max)；)main(){intx,y；scanf("%d",&x)；if(x<l)y=x；elseif(x<10)y=2*x-1；elsey=3*xTl；printf("y=%d",y)；mainO{intscore,temp,logic；chargrade；logic=l；while(logic){scanf("%d",&score)；if(score>=0&&score<=100)logic=0；)if(score==100)temp=9；elsetemp=(score-score%10)/10；switch(temp){case9：grade='A'；break；case8：grade='B'；break；case7：grade='C'；break；case6：grade='D'；break；case5：case4：case3-case2：case1'case〇:grade=E；}printfHscore=%d,grade=%cH,score,grade)；)4.7mainO{longintnum：intindiv,ten,hundred,thousand,ten_thousand,place；scanf("％ld",&num)；if(num>9999)place=5：elseif(num>999)place=4；elseif(num>99)place=3：elseif(num>9)place=2；elseplace=l：printf(Hplace=%dWnu,place)；ten_thousand=num/10000；thousand=(num-ten_thousand*10000)/1000；hundred=(num-ten_thousand*1OOOO-thousand*1000)/100：ten=(num-ten_thousand*10000-thousand*1000-hundred*100)/10：indiv=num-ten_thousand*10000-thousand*1000-hundred*100-ten*10；switch(place){case5printf(M%d,%d,%d,%d,%dWnn,ten_thousand,thousand,hundred,ten,indiv)；printf(H%d,%d,%d,%d,%dWnu,indiv,ten,hundred,thousand,ten.thousand)：break；case4：printf("%d,%d,%d,%dWn”,thousand,hundred,ten,indiv)；printf(H%d,%d,%d,%dWnu,indiv,ten,hundred,thousand)：break：case3-printf(H%d,%d,%dWnH,hundred,ten,indiv)：printf(H%d,%d,%dWnH,indiv,ten,hundred)：break：case2：printf("%d,%dWn”,ten,indiv)：printf(H%d,%dWnn,indiv,ten)：break：case1-printf(n%dWnn,indiv)：printf("%dWn”,indiv)：mainO{longi；floatbonus,bonI,bon2,bon4,bon6,bon10；bonl=100000*0.1；bon2=bonl+100000*0.075；bon4=bon2+200000*0.05；bon6=bon4+200000*0,03；bonl0=bon6+400000*0.015；scanf("%ld",&i)；if(i<=le5)bonus=i*0.1；elseif(iく=2e5)bonus=bonl+(i-100000)*0.075；elseif(iく=4e5)bonus=bon2+(1-200000)*0.05；elseif(i<=6e5)bonus=bon4+(>400000)*0.03；elseif(i<=le6)bonus=bon6+(i-600000)*0,015；elsebonus=bonl0+(i-1000000)*0.01；printf("bonus=%10.2f",bonus)；)main(){longi；floatbonus,bonl,bon2,bon4,bon6,bonl0；intbranch；bonl=100000*0.1;bon2=bonl+100000*0,075；bon4=bon2+200000*0.05；bon6=bon4+200000*0.03；bonl0=bon6+400000*0,015；scanf("%ld",&i)；branch=i/l00000；if(branch>10)branch=10；switch(branch){case〇:bonus=i*0.1；break；casel：bonus=bonl+(i-100000)*0,075；break；case2：case3：bonus=bon2+(i-200000)*0.05；break；case4：case5：bonus=bon4+(i-400000)*0.03；break；case6：case7case8：case9：bonus=bon6+(i-600000)*0.015；break；case10：bonus=bonl0+(iT000000)*0.01；printf("bonus=%10.2f",bonus)；4.9mainO{intt,a,b,c,d；scanf("%d,%d,%d,%d",&a,&b,&c,&d)；if(a>b){t=a；a=b；b=t；}if(a>c){t=a；a=c；c=t；}if(a>d){t=a；a=d；d=t；}if(b>c){t=b；b=c；c=t；}if(b>d){t=b；b=d；d=t；}if(c>d){t=c；c=d；d=t；}printf("%d%d%d%dWn",a,b,c,d)；)4.10mainO{inth=10；floatx,y,xO=2,yO=2,dl,d2,d3,d4；scanf("%f,%f",&x,&y)；dl=(X-x0)*(X-x0)+(y-yO)*(y-yO)；d2=(x-x0)*(x-x0)+(y+yO)*(y+yO)；d3=(x+x0)*(x+x0)+(y-yO)*(y-yO)；d4=(x+xO)*(x+xO)+(y+yO)*(y+yO)；if(dl>l&&d2>l&&d3>l&&d4>l)h=O；printf("h=%d",h)；)第五章循環(huán)控制5.1mainO{inta,b,numl,num2,temp；scanf("%d,%d",&numl,&num2)；if(numl<num2){temp=numl；numl=num2；num2=temp；}a=numl；b=num2；while(b!=O){temp=a%b；a=b；b=temp；}printf("%dWn",a)；printf("%dWn",numl*num2/a)；)5.2#include"stdio.h"mainO{charc；intIetters=0,space=0,digit=0,other=0；while((c=getchar())!=,Wn,){if(c>='a'&&cく='z'IIc>='A'&&cく='Z')letters-*-+；elseif(c==,*)space++；elseif(c>='0,&&c<=,9')digit++；elseother++；}printf(Hletters=%dWnspace=%dWndigit=%dWnother=%dWnu,letters,space,digit,other)；}5.3mainO{inta,n,count=l,sn=0,tn=0；scanf("%d,%d",&a,&n)；while(count<=n){tn+=a；sn+=tn：a*=10：++count：}printf("a+aa+aaa+...=%dWnn,sn)；mainO{floatn,s=0,t=l；for（n=l；n<=20；n++）{t*=n；s+=t；}printf（"s=%eWn",s）；）5.5mainO{intNl=100,N2=50,N3=10；floatk；floatsl=0,s2=0,s3=0；for（k=l；k<=Nl；k++）sl+=k；for（k=l；k<=N2；k++）s2+=k*k；for（k=l；kく=N3；k++）s3+=l/k；printf（"s=%8.2fWn",sl+s2+s3）；}mainOfor(n=100；n<1000；n++){i=n/100；j=n/10-i*10；k=n%10；if(i*100+j*10+k==i*i*i+j*j*j+k*k*k)printf("n=%dWn",n)；))#defineM1000mainO{intk0,kl,k2,k3,k4,k5,k6,k7,k8,k9；inti,j,n,s；for(j=2；j<=M；j++){n=0；s=j；for(i=l；i<j；i++){if((j%i)==O){n++；s=s-i；switch(n){casel：kO=i；break；case2：kl=i；break；case3：k2=i；break；case4：k3=i；break；case5：k4=i；break；case6：k5=i；break；case7：k6=i；break；case8：k7=i；break；case9：k8=i；break；case10:k9=i；break；}}}if(s==O){printf("j=%dWn",j)；if(n>l)printf("%d,%d",kO,kl)；if(n>2)printf(",%d\k2)；if(n>3)printf(",%d",k3)；if(n>4)printf(",%d",k4)；if(n>5)printf(",%d",k5)；if(n>6)printf("1%d",k6)；if(n>9)printf(",%dWn",k9)；})}mainO{staticintk[10]；inti,j,n,s；for(j=2；j<=1000；j++){n=-l；s=j；for(i=l；i<j；i++){if((j%i)==O){n++；s=s-i；k[n]=i；)}if(s==O){printf("j=%dWn",j)；for(i=0；i<n；i++)|)5.8mainO(intn,t,number=20；floata=2；b=l；s=0；for(n=l；n<=number；n++){s=s+a/b；t=a,a=a+b,b=t；}printf("s=%9.6fWn",s)；}5.9mainO{floatsn=100.0,hn=sn/2；intn；for(n=2；n<=10；n++){sn=sn+2*hn；hn=hn/2；printf("sn=%fWn",sn)；printf("hn=%fWn",hn)；)5.10mainO{intday,xl,x2；day=9；x2=l；while(day>0){xl=(x2+1)*2；x2=xl；day一；printf("xl=%dWn",xl)；5.11#include"math.h"mainO{floata,xn0,xnl；scanf("%f",&a)；xn0=a/2；xnl=(xnO+a/xnO)/2；do{xnO=xnl；xnl=(xnO+a/xn0)/2；}while(fabs(xn0-xnl)>=le-5)；printf(Ma=%5.2fWn,xnl=%8.2fWnH,a,xnl)；)5.12#includeHmath.hnmainO{floatx,xO,f,fl；x=1.5；do{xO=x；f=((2*x0-4)*x0+3)*x0-6；fl=(6*xO-8)*xO+3；x=xO-f/fl；}while(fabs(x-x0)>=le-5)；printf("x=%6.2fWn",x)；5.13#include"math.h"mainO{floatx0,xl,x2,fx0,fxl,fx2；do{scanf("%f,%f",&xl,&x2)；fxl=xl*((2*xl-4)*xl+3)-6；fx2=x2*((2*x2-4)*x2+3)-6；)while(fxl*fx2>0)；do{xO=(xl+x2)/2；fx0=x0*((2*x0-4)*x0+3)-6；if((fxO*fxl)<O){x2=x0；fx2=fx0；}else{xl=xO；fxl=fxO；）}while（fabs（fxO）>=le-5）；printf（"xO=%6.2fWn",xO）；}5.14main（）（inti,j,k；for（i=0；i<=3；i++）{for（j=0；j<=2-i；j++）printfC"）；for（k=0；k<=2*i；k++）printfC'*"）；printfC'Wn"）；）for（i=0；i<=2；i++）（for（j=0；j<=i；j++）printfC'"）；for（k=0；k<=4-2*i；k++）printfC'*"）；printfC'Wn"）；5.15mainO{chari,j,k；for(i='x'；i<='z'；i++)for(j="x'；j<='z'；j++){if(i!=j)for(k='x'；k<='z'；k++){if(i!=k&&j!=k){if(i!='x,&&k!='x'&&k!='z')printfC'Wna一%cWtb--%cWtc--%cWn",i,j,k)；})})第六章數(shù)組6.1#include<math.h>#defineN101mainO{inti,j,line,a[N]；for(i=2；i<N；i++)a[i]=i；for(i=2；i<sqrt(N)；i++)for(j=i+l；j<N；j++){if(a[i]]=0&&a[j]!=O)if(a[j]%a[i]==O)a[j]=0； }printfC'Wn")；for(i=2,line=0；i<N；i++){if(a[i]!=0){printf("%5d",a[i])；line++；}if(line==10){printfC'Wn")；line=0；}))6.2#defineN10mainO{inti,j,min,temp,a[N]；for(i=0；iくN；i++)scanf("%d",&a[i])；for（i=0；i<N-l；i++）{min=i；for（j=i+l；j<N；j++）if（a[min]>a[j]）inin=j；temp=a[i]；a[i]=a[min]；a[min]=temp；）for（i=0；i<N；i++）printf（"%5d",a[i]）；}6.3mainO{floata[3][3],sum；inti,j；for（i=0；i<3；i++）for（j=0；j<3；j++）{scanf（"%f",&sum）；a[i][j]=sum；}sum=sum+a[i][i]；printf(Hsum=%fn,sum)；)6.4mainO{inta[ll]={1,4,6,9,13,16,19,28,40,100}；inttempl,temp2,number,end,i,j；scanf("%d”,&number)；end=a[9]；if(number>end)a[10]=number；else{for(i=0；i<10；i++){if(a[i]>number){templ=a[i]；a[i]=number；for(j=i+l；j<ll；j++){temp2=a[j]；a[j]=templ；templ=temp2；break；for（i=0；i<ll；i++）printf（"%6d",a[i]）；}6.5#defineN5mainO{inta[N]={8,6,5,4,l},i,temp；for（i=0；i<N/2；i++）{temp=a[i]；a[i]=a[N-i-l]；a[N-i-l]=temp；for（i=0；i<N；i++）printf（"%4d",a[i]）；）6.6#defineN11mainO{inti,j,a[N][N]；for（i=l；i<N；i++）{a[i][i]=l；a[i][l]=l；）for（i=3；i<N；i++）for（j=2；j<i；j++）a[i][j]=a[i-l][j-l]+a[i-l][j]；for（i=l；i<N；i++）{for（j=l；j<=i；j++）printf（"%6d",a[i][j]）；printfC'Wn"）；6.7mainO{inta[16][16],i,j,k,p,m,n；p=l；while（p==l）{scanf（"%d",&n）；if（（n!=O）&&（nく=15）&&（n%2!=0））p=O；for（i=l；i<=n；i++）for(j=l；j<=n；j++)a[i][j]=0；j=n/2+l；a[l][j]=l；for(k=2；k<=n*n；k++){i=i-l；j=j+l；if((i<l)&&(j>n)){i=i+2；j=j-l：}else{if(i<l)i=n；if(j>n)j=l；}if(a[i][j]==O)a[i][j]=k；else{i=i+2；j=j-l：a[i][j]=k；for（i=l；i<=n；i++）{for（j=l；j<=n；j++）printf（"%3d",a[i][j]）；printfC'Wn"）；}）6.8#defineN10#defineM10mainO{inti,j,k,m,n,flagl,flag2,a[N][M],max,maxi,maxj；scanf（"%d,%d",&n,&m）；for（i=0；i<n；i++）for（j=0；j<m；j++）scanf（"%d",&a[i][j]）；flag2=0；for（i=0；i<n；i++）{max=a[i][0]；for（j=0；j<m；j++）if（max<a[i][j]）{max=a[i][j]；maxj=j；)for(k=0,flagl=1；k<n&&flagl；k++)if(max>a[k][maxj])flagl=O；if(flagl){printf(MWna[%d][%d]=%dWn,\i,maxj,max)；flag2=l；)}if(!flag2)printf(HNOTn)；}6.9#include<stdio.h>#defineN15mainO{inti,j,number,top,bott,min,loca,a[N],flag；charc；for(i=0；i<=N：i++)scanf(H%dH,&a[i])；flag=l；while(flag){scanf(H%dn,&number)：loca=0；top=0；bott=N-l；if((number<a[O])lI(number>a[N-1]))loca="l；while((loca==0)&&(top<=bott)){min=(bott+top)/2；if(number==a[min]){loca=min；printf(Hnumber=%d,loca=%dWnn,number,loca+1)；}elseif(number<a[min])bott=min-l；elsetop=min+1；)if(loca==0||loca==-l)printf(n%dnotintableWn”,number)；printf(HcontinueY/Nory/nWn”)；c=getchar()；if(c==,N,|Ic==,n,)flag=0；mainO(inti,j,uppn,lown,dign,span,othn；chartext[3][80]；uppn=lown=dign=span=othn=0；for(i=0；i<3；i++)(gets(text[i])；for(j=0；i<80&&text[i][j]!='W0'；j++){if(text[i][j]>='A'&&text[i][j]<='Z')uppn++；elseif(text[i][j]>='a'&&text[i][j]<='z')lown++；elseif(text[i][j]>='O'&&text[i][j]<='9')dign++；elseif(text[i][j]==,')span++；elseothn++；)}for(i=0；i<3；i++)printf("%sWn",text[i])；printf("uppn=%dWn",uppn)；printf("lown=%dWn",lown)；printf("dign=%dWn",dign)；printfC*span=%dWn",span)；printf("othn=%dWn",othn)；)6.11mainO{staticchara[5]={'*',inti,j,k；charspace=''；for(i=0；i<=5；i++){printfC'Wn")；for(j=l；j<=3*i；j++)printfC'%lc",space)；for(k=0；k<=5；k++)printf("%3c",a[k])；}}6.12#include<stdio.h>main(){inti,n；charch[80],tran[80]；gets(ch)；i=O；while(ch[i]!^'WO'){if((ch[i]>=,A')&&(ch[i]<=,Z'))tran[i]=26+64-ch[i]+1+64；elseif((ch[i]>='a')&&(ch[i]<='z,))tran[i]=26+96-ch[i]+1+96；elsetran[i]=ch[i]；i++；)n=i；for(i=0；i<n；i++)putchar(tran[i])；}6.13main(){charsi[80],s2[40]；inti=O,j=O；scanf("%s",sl)；scanf("%s",s2)；while(sl[i]!='WO')i++；while(s2[j]!='WO')s1[i++]=s2[j++]；sl[i]='WO'；printfC's=%sWn",sl)；)6.14#include<stdio.h>main(){inti,resu；charsl[100],s2[100]；gets(sl)；gets(s2)；i=O；while((sl[i]==s2[i])&&(sl[i]!='WO'))i++；if(sl[i]=='W0,&&s2[i]==,W0')resu=0；elseresu=sl[i]-s2[i]；printf("sl=%s,s2=%s,resu=%dWn",sl,s2,resu)；#includenstdio.h,rmain(){charfrom[80],to[80]；；inti；scanf("%s\from)；for(i=0；i<=strlen(from)；i++)to[i]=from[i]；printf(H%sWn",to)；}第七章7.1hcf(u,v)intu,v；{inta,b,t,r；if(u>v){t=u；u=v；v=t；}a=u；b=v；while((r=b%a)!=O){b=a；a=r；}return(a)；}lcd(u,v,h)intu,v,h；{return(u*v/h)；}mainO{intu,v,h,l；scanf("％d,%d",&u,&v)；h=hcf(u,v)；printf(HH.C.F=%dWnn,h)；l=lcd(u,v,h)；printf(HL.C.D=%dWnn,l)；}7.2#includenmath.hHfloatxl,x2,disc,p,q；greater_than_zero(a,b)floata,b；{xl=(-b+sqrt(disc))/(2*a)；x2=(-b-sqrt(disc))/(2*a)；}equal_to_zero(a,b)flaota,b；{xl=x2=-b/(2*a)；}smaller_than_zero(a,b)floata,b；{p=-b/(2*a)；q=sqrt(-disc)/(2*a)；}mainO{floata,b,c；scanf("%f,%f,%f",&a,&b,&c)；disc=b*b-4*a*c；if(fabs(disc)<=le-5){equal_to_zero(a,b)；printf("xl=%5.2fWtx2=%5.2fWn",xl,x2)；}elseif(disc>0){greater_than_zero(a,b)；printf("xl=%5.2fWtx2=%5.2fWn",xlJx2)；}else{smaller_than_zero(a,b)；printf("xl=%5.2f+%5.2fiWtx2=%5.2f-%5.2fiWn",p,q,p,q)；mainO{intnumber；scanf(H%dH,&number)；if(prime(number))printfC'yes")；elseprintf(uno,')；)intprime(number)intnumber；{intflag=l,n；for(n=2；n<number/2&&flag==l：n++)if(number%n==O)flag=O；return(flag)：)7.4#defineN3intarray[N][N]；convert(array)intarray[3][3]；for（i=0；i<N；i++）for（j=i+l；j<N；j++）{t=array[i][j]；arrayti][j]=array[j][i]；arraytj][i]=t；）}mainO{inti,j；for（i=0；i<N；i++）for（j=0；j<N；j++）scanf（"%d",&array[i][j]）；convert（array）；for（i=0；i<N；i++）{printfC'Wn"）；for（j=0；j<N；j++）printf（"%5d",arrayti][j]）；））mainO(charstr[100]；scanf("%s",str)；inverse(str)；printf("%sWn",str)；}inverse(str)charstr[]；{chart；inti,j；for(i=0,j=strlen(str)；i<strlen(str)/2；i++,j--){t=str[i]；str[i]=str[j-l]；str[j-l]=t；))charconcate(strl,str2,str)charstrl[],str2[],str[]；{inti,j；for(i=0；strl[i]!='W0'；i++)str[i]=strl[i]；for(j=0；str2fj]!='W0'：j++)str[i+j]=str2[j]；str[i+j]='WO'；)main(){charsl[100],s2[100],s[100]；scanf("%s",sl)；scanf("%s",s2)；concate(sl,s2,s)；printf("Wns=%s",s)；)mainO{charstr[80],c[80]；voidcpy()；gets(str)；cpy(str.c)；printf("Wn%sWn",c)；)voidcpy(s,c)chars[],c[]；{intij；for(i=0,j=0；s[i]!='W0'；i++)if(s[i]=='a'lls[i]=='A'|ls[i]=='e'lls[i]=='E'|ls[i]=='i'|Is[i]=='r||s[i]=='o'|ls[i]=='O'||s[i]=='u'||s[i]=="U'){c[j]=s[i]；j++；)c[j]='WO'；}main(){charstr[80]；scanf("%s",str)；insert(str)；}insert(str)charstr[]；{inti；for(i=strlen(str)；i>0；i一){str[i*2]=str[i]；str[i*2-l]=''；}printf("%sWn",str)；7.9intalph,digit,space,others；mainO{chartext[80]：gets(text)；alph=0,digit=0,space=0,others=0：count(text)；printf(nWnalph=%d,digit=%d,space=%d,others=%dWnu,alph,digit,space,others)；}count(str)charstr[]：{inti：for(i=0；str[i]!=,W0,；i++)if((str[i]>=(a,&&str[i]<=,z,)|I(str[i]>=,A,&&str[i]<=*Z*))alph++：elseif(str[i]>='O'&&str[i]く=9)digit++：elseif(strcmp(str[i]/,)==0)space++：elseothers++；)7.10intalph(c)charc；{if((c>='a'&&c<='z')lI(c>='A'&&c<='Z'))return(l)；elsereturn(O)；)intlongest(string)charstring[]；{intlen=O,i,length=O,flag=l,place,point；for(i=0；i<=strlen(string)；i++)if(alph(string[i]))if(flag){point=i；flag=O；}elselen++；else{flag=l；if(len>length){length=len；place=point；len=O；})return(place)；)mainO{inti；charline[100]；gets(line)；for(i=longest(line)：alph(line[i])：i++)printf(,,%c,1Jine[i])；printf(HWnu)；)7.11#defineN10charstr[N]；mainOfor(flag=1；flag==1；){scanf("%s",str)；if(strlen(str)>N)printfC'inputerror")；elseflag-O；}sort(str)；for(i=0；i<N；i++)printf("%c",str[i])；}sort(str)charstr[N]；{inti,j；chart；for(j=l；j<N；j++)for(i=0；(iくN-j)&&(str[i]!='WO')；i++)if(str[i]>str[i+1]){t=str[i]；str[i]=str[i+1]；str[i+1]=t；7.12#include<math.h>floatsolut(a,b,c,d)floata,b,c,d；{floatx=l,xO,f,fl；do{xO=x；f=((a*xO+b)*xO+c)*xO+d；fl=(3*a*x0+2*b)*x0+c；x=xO-f/fl；)while(fabs(x-x0)>=le-5)；return(x)；)main(){floata,b,c,d；scanf("％f,%f,%f,%f”,&a,&b,&c,&d)；printf(nx=%10.7fWnH,solut(a,b,c,d))；7.13mainO{intx,n；floatp()；scanf("%d,%d",&n,&x)；printf("P%d(%d)=%10.2fWn",n,x,p(n,x))；)floatp(tn,tx)inttn,tx；{if(tn==O)return(l)；elseif(tn==l)return(tx)；elsereturn(((2*tn-l)*tx*p((tn-l),tx)-(tn-l)*p((tn-2),tx))/tn)；)7.14#defineN10#defineM5floatscore[N][M]；floata_stu[N],a_cor[M]；mainO{inti,j,r,c；floath；floats_diff()；floathighestO；r=0；c=l；input_stu()；avr_stu()；avr_cor()；printfC'Wnnumberclass12345avr")；for(i=0；i<N；i++){printf("WnN0%2d",i+1)；for(j=0；j<M；j++)printf("%8.2f",score[i][j])；printf("%8.2f",a_stu[i])；)printfC'Wnclassavr")；for(j=0；j<M；j++)printf("%8.2f",a_cor[j])；h=highest(&r,&c)；printf("WnWn%8.2f%d%dWn",h,r,c)；printfC'Wn%8.2fWn",s_diffO)；input-stu()(inti,j；floatx；for(i=0；i<N；i++){for(j=0；j<M；j++){scanf("%f",&x)；score[i][j]=x；)}}avr_stu(){inti,j；floats；for(i=0；i<N；i++){for(j=0,s=0；j<M；j++)s+=score[i][j]；a_stu[i]=s/5.0；})avr_cor()floats；for(j=0；j<M；j++){for(i=0,s-0；i<N；i++)s+=score[i][j]；a_cor[j]=s/(float)N；))floathighest(r,c)int*r,*c；{floathigh；inti,j；high=score[0][0]；for(i=0；i<N；i++)for(j=0；j<M；j++)if(score[i][j]>high){high=score[i][j]；*r=i+1；*c=j+1；}return(high)；}{inti,j；floatsumx=0.0,sumxn=0.0；for(i=0；i<N；i++){sumx+=a_stu[i]*a_stu[i]；sumxn+=a_stu[i]；}return(sumx/N-(sumxn/N)*(sumxn/N))；}7.15#include<stdio.h>#defineN10voidinput_e(num,name)intnum[]；charname[N][8]；{inti；for(i=0；i<N；i++){scanf(M%dH,&num[i])；gets(name[i])；}}voidsort(num,name)charname[N][8]；{intiJ,min,tempi；chartemp2[8]：for(i=0；i<N-l：i++){min=i；for(j=i；j<N；j++)if(num[min]>num[j])min=j；templ=num[i]：num[i]=num[min]；num[min]=templ：strcpy(temp2,name[i])：strcpy(name[i],name[min])；strcpy(name[min],temp2)：}for(i=0；iくN；i++)printf(HWn%5d%10sM,num[i],name[i])；)voidsearch(n,num,name)intn,num[]：charname[N][8]：{inttop,bott,min』oca；loca=0：top=0；bott=N-l；if((n<num[O])|I(n>num[N-l]))loca=-l；while((loca==0)&&(top<=bott)){min=(bott+top)/2；if(n==num[min]){loca=min；printf(,,number=%d,name=%sWnu,n,name[loca])；)elseif(n<num[min])bott=min-l；elsetop=inin+1；)if(loca==Ol|loca==-l)printf(nnumber=%disnotintableWn”,n)；}mainO{intnum[N],number,flag,c,n；charname[N][8]；input_e(num,name)；sort(num,name)；for(flag=l；flag；){scanf("%d",&number)；search(number,num,name)；printf("continue?Y/N!")；c=getchar()；if(c=='N'llc=='n')flag=O；))7.16#include<stdio.h>#defineMAX1000mainO{intc,i,flag,flagl；chart[MAX]；i=0；flag=O；flagl=l；while((c=getchar())!='WO'&&i<MAX&&flagl){if(c>='0'&&c<=,9'||c>='A'&&c<='F'l|c>='a'&&c<='f'){flag=l；t[i++]=c；}elseif(flag){t[i]='WO'；printfCWnnumber=%dWn",htoi(t))；printfC'continue?")；c=getchar()；if(c=='n'|Ic=='N')flagl=0；else{flag=0；i=0；)htoi(s)chars[]；{inti,n；n=0；for(i=0；s[i]!='W0'；i++){if(s[i]>='0'&&s[i]<='9')n=n*16+s[i]-'O'；if(s[i]>='a'&&s[i]<=,f)n=n*16+s[i]-'a'+10；if(s[i]>='A'&&s[i]<='F')n=n*16+s[i]-'A'+10；}return(n)；}7.17#include<stdio.h>voidconvert(n)intn；{inti；if((i=n/10);=0)convert(i)；putchar(n%10+'0')；)mainO{intnumber；scanf("%d",&number)；if(number<0){putcharC-')；number=-number；}convert(number)：)7.18mainO{intyear,month,day：intdays；scanf(HWn%d,%d,%dn,&year,&month,&day)；days=sum_day(month,day)；if(leap(year)&&(month>=3))days+=1；printf(ndays=%dWnn,days)：)staticintday_tab[13]={0,31,28,31,30,31,30,31,31,30,31,30,31}intsum_day(month,day)intmonth,day；{inti；for(i=l；iくmonth；i++)day+=day_tab[i]；return(day)；intleap(year)intyear；{intleap；leap=year%4==0&&year%100!=01Iyear%400==0；return(leap)；)第八章編譯預(yù)處理#defineSWAP(a,b)t=b；b=a；a=tmain(){inta,b,t；scanf("%d,%d",&a,&b)；SWAP(a,b)；printf("a=%dWtb=%dWn",a,b)；}#defineSURPLUS(a,b)((a)%(b))main(){inta,b；scanf("%d,%d",&a,&b)；printf("%d",SURPLUS(a,b))；#include"math.h"#defineS(a,b,c)((a+b+c)/2)#defineAREA(a,b,c)(sqrt(S(a,b,c)*(S(a,b,c)-a)*(S(a,b,c)-b)*(S(a,b,c)-c)))mainO{floata,b,c；scanf("%f,%f,%f",&a,&b,&c)；if(a+b>c&&b+c>a&&a+c>b)printf("area=%8.2fWn",AREA(a,b,c))；elseprintfC'inputerror")；}#defineLEAP(y)(y%4==0)&&(y%100!=0)II(y%400==0)mainO{intyear；scanf("%d",&year)；if(LEAP(year))printfC'yes")；elseprintfC'no")；)printf("value=%formatWt",x)；printf("value=%formatWt",x)；putchar('Wn')；printf("value=%formatWt",xl)；printf("value=%formatWt",x2)；putchar('Wn')；輸出結(jié)果:value=5.000000ormat value=5.000000ormatvalue=3.000000ormat value=8.000000ormat#definePRprintf#defineNL"Wn"#defineFs"%f"#defineF"%6.2f"#defineFlFNL#defineF2F"Wt"FNL#defineF3F"Wt"F"Wt"FNL{floata,b,c；scanf(Fs,&a)；scanf(Fs,&b)；scanf(Fs,&c)；PR(NL)；PR(Fl,a)；PR(Fl,b)；PR(Fl,c)；PR(NL)；PR(F2,a,b)；PR(Fl,c)；PR(NL)；PR(F3,a,b,c)；)Aformat.h文件*/#defineDIGIT(d)printf("%dWn",d)#defineFLOAT(f)printf("%8.2fWn",f)#defineSTRING(s)printf("%sWn",s)/?用戶文件?/#include"format.h"{intd,num；floatf；chars[80]；scanf("%d”,&num)；switch(num){casel：scanf("%d”,&d)；DIGIT(d)；break；case2：scanf("%f”,&f)；FLOAT(f)；break：case3：scanf("%s",s)；STRING(s)：break；default：printf("error")；})mainO{inta,b,c；scanf("％d,%d,%d”,&a,&b,&c)；printf("max=%dWn",max(a,b,c))；)max(a,b,c)inta,b,c；{intt；t=x>y?x：y；return(t>z?t：z)；)#defineMAX(a,b)((a)Xb)?(a)：(b))mainO{inta,b,c；scanf("%d,%d,%d",&a,&b,&c)；printf("max=%dWn",MAX(MAX(a,b),c))；)8.10#include"stdio.h"#defineMAX80#defineCHANGE1mainO{charstr[MAX]；inti；scanf("%s",str)；#if(CHANGE){for(i=0；i<MAX；i++){if(str[i]!='WO')if(str[i]>='a"&&str[i]<'z'lIstr[i]>='A'&&str[i]<'Z")str[i]++；elseif(str[i]=='z'|Istr[i]=='Z')str[i]-=25；}}#endifprintf("Wn%sWn",str)；)第九章指針9.1mainO{intnl,n2,n3；int*pl,*p2,*p3；scanf("%d,%d,%d",&nl,&n2,&n3)；pl=&nl；p2=&n2；p3=&n3；if(nl>n3)swap(pl,p3)；if(n2>n3)swap(p2,p3)；printf(n%d,%d,%dWnH,nl,n2,n3)；)swap(pl,p2)int*pl,*p2；{intp；p=*pl；*pl=*p2；*p2=p；)9.2mainO{char*strl[20],*str2[20],*str3[20]；charswapO；scanf("%s",strl)；scanf(n%sH,str2)；scanf(H%sn,str3)；if(strcmp(str1,str2)>0)swap(str1,str2)；if(strcmp(strl,str3)>0)swap(strl,str3)；if(strcmp(str2,str3)>0)swap(str2,str3)；printf(H%sWn%sWn%sWnH,strl,str2,str3)；}char*pl,*p2；{char*p[20]；strcpy(p,pl)；strcpy(pl,p2)；strcpy(p2,p)；)9.3main(){intnumber[10]；input(number)；max_min_value(number)；output(number)；)input(number)intnumber[10]；{inti；for(i=0；i<10；i++)scanf("%d",&number[i])；)max_min_value(number)intnumber[10]；{int*max,*min；int*p,*end；end=number+10；max=min=number；for(p=number+l；p<end：p++)if(*p>*max)max=p；elseif(*pく?min)min=p；*p=number[〇];number[0]=*min；*min=*p；*p=number[9]：number[9]=*max；*max=*p；return；)output(number)intnumber[10]；{int*p；for(p=number；pくnumber+9；p++)printf(”％d,”,*p)；printf("%dW:n",*p)；mainO{intnumber[20],n,m,i；scanf("%d”,&n)；scanf("％d”,&m)；for(i=0；i<n*i++)scanf(M%dH,&number[i])；move(number,n,m)；for(i=0；i<n；i++)printf(n%8dH,number[i])；}move(array,n,m)intarray[20],n,m；{int*p,end；end=*(array+n-1)；for(p=array+n-l；p>array；p--)*p=*(p-l)；*array=end；m一;if(m>0)move(array,n,m)；#definenmax50mainO{inti,k,m,n,num[nmax],*p；scanf("%d",&n)；p=num；for(i=0；i<n；i++)*(p+i)=i+1；i=k=m=0；while(m<n-l){if(*(p+i)!=O)k++；if(k==3){*(p+i)=O；k=0；m++；)i++；if(i==n)i=O；}while(*p==O)p++；printf("%d",*p)；mainO(intlen；char*str[20]；scanf("%s",str)；len=length(str)；printf("Wnlen=%dWn",len)；}length(p)char*p；{intn=O；while(*p!='WO'){n++；p++；}return(n)；}9.7mainO{intm；char*strl[2O],*str2[2O]；scanf("%s",strl)；scanf("%d",&m)；if(strlen(strl)<m)printfC'error")；else{copystr(strl,str2,m)；printf("%s",str2)；})copystr(pl,p2,m)char*pl,*p2；intm；{intn=0；while(n<m'l){n++；pl++；}while(*pl!='WO'){*p2=*pl；pl++；p2++；}*p2='W0'；)9.8#include"stdio.h"(intcle=0,sle=0,di^0,wsp=0,ot=0,i；char*p,s[20]；for(i=0；i<20；i++)s[i]=0；i=0；while((sii]=getchar())!='Wn')i++；p=s；while(*p!='Wn'){if(*p>='a,&&*p<='z')++sle；elseif(*p>='A'&&*p<='Z')++cle；elseif(*p=='')++wsp；elseif(*p>='〇'&&*p<='9')++di；else++ot；p++；)printf("sle=%d,cle^%d,wsp=%d,di=%d,ot=%dWn",sle,cle,wsp,di,ot)；mainO{inta[3][3],*p,i；for(i=0；i<3；i++)scanf("%d,%d,%d",a[i][O],a[i][l],a[i][2])；p=a；move(p)；for(i=0；i<3；i++)printf("%d%d%dWn",a[i][O],a[i][l],a[i][2])；)move(pointer)int*pointer；{inti,j,t；for(i=0；i<2；i++)for(j=i+l；j<3；j++){t=*(pointer+3*i+j)；*(pointer+3*i+j)=*(pointer+3*j+i)；*(pointer+3*j+i)=t；})9.10{inta[5][5],*p,i,j；for(i=0；i<5；i++)forG=0；j<5；j++)scanf("%d",&a[i][j])；p=a；change(p)；for(i=0；i<5；i++){printfC'Wn")；for(j=0；j<5；j++)printf("%8d",a[i][j])；})change(p)int*p；{inti,j,change；int*pmax產(chǎn)pmin；pmax=p；pmin=p；for(i=0；i<5；i++)for(j=0；j<5；j++){if(*pmaxく*(p+5*i+j))pmax=p+5*i+j；if(*pmin>*(p+5*i+j))pmin=p+5*i+j；change=*(p+12)；(p+12)=*pmax：*pmax=change：change=*p；*p=*pmin：*pmin=change：pmin=p+1；for(i=0；i<5；i++)for(j=0；j<5；j++)if(((p+5*i+j)!=p)&&(*pmin>*(p+5*i+j)))pmin=p+5*i+j；change=*(p+4)：(p+4)=*pmin：*pmin=change：pmin=p+1；for(i=0；i<5；i++)for(j=0；j<5；j++)if(((p+5*i+j)!=(p+4))&&((p+5*i+j)!=p)&&(*pmin>*(p+5*i+j)))pmin=p+5*i+j：change=*(p+20)；(p+20)=*pmin；*pmin=change：pmin=p+1；for(i=0；i<5；i++)for(j=0；j<5；j++)if(((p+5*i+j)!=p)&&((p+5*i+j)!=(p+4))&&((p+5*i+j)!=(p+20))&&(*pmin)*(p+5*i+j)))pmin=p+5*i+j；change=*(p+24)；(p+24)=*pmin；*pmin=change；)9.11mainO{inti；char*p,str[10][10]；for(i=0；i<10；i++)scanf("%s",str[i])；p=str；sort(p)；for(i=0；iく10；i++)printf("%sWn",str[i])；)sort(p)char*p；{inti,j；chars[10],*smax,*smin；for(i=0；i<10；i++){smax=p+10*i；for(j=i+l；j<10；j++){smin=p+10*j；if(strcmp(smax,smin)>O){strcpy(s,smin)；strcpy(smin,smax)；strcpy(smax,s)；})))9.12#defineMAX20mainO{inti；char*pstr[10],str[10][MAX]；for(i=0；i<10；i++)pstr[i]=str[i]；for(i=0；i<10；i++)scanf("%s",pstr[i])；sort(pstr)；for(i=0；i<10；i++)printf("%sWn",pstr[i])；}sort(pstr)char*pstr[10]；{inti,j；char*p；for(i=0；i<10；i++){forQ=i+l；j<10；j++){if(strcmp(*(pstr+i),*(pstr+j))>0){p=*(pstr+i)；*(pstr+i)=*(pstr+j)；*(pstr+j)=p；)}})9.13#include"math.h"floata,b,al,bl,a2,b2,c,(*p)(),jiff()；scanf("%f,%f”,&a,&b)；scanf(H%f,%fH,&al,&bl)；scanf(',%f,%fH,&a2,&b2)；p=sin；c=jiff(a,b,n,p)；printf(Hsin=%fWnH,c)；p=cos；c=jiff(al,bl,n,p)；printf(Hcos=%fWnH,c)；p=exp；c=jiff(a2,b2,n,p)；printf(Mexp=%fWnH,c)；}floatjiff(a,b,n,p)floata,b,(*p)()；intn；{inti；floatx,f,h,area；h=(b-a)/n；x=a,area=O；for(i=l；i<=n；i++){x=x+h；area=area+(*p)(x)*h；}return(area)；)9.14mainO{inti,n,num[20]；char*p；scanf("%d",&n)；for(i=0；i<n；i++)scanf("%d",&num[i])；p=num；sort(p,n)；for(i=0；i<n；i++)printf("%8d",num[i])；)sort(p,m)char*p；{inti；charchange,*pl,*p2；for（i=0；i<m/2；i++）{pl=p+i；p2=p+（m-l-i）；change=*pl；*pl=*p2；*p2=change；}）9.15mainO{inti,j,*pnum,num[4]；floatscore[4][5],aver[4],*psco,*pave；charcourse⑸[10],*pcou；pcou=course[0]；for（i=0；i<5；i++）scanf（"%s",pcou+10*i）；printfC'number"）；for（i=0；i<5；i++）printf（",%s",pcou+10*i）；printfC'Wn"）；psco=score,pnum=num；for(i=0；i<4；i++){scanf("%d",pnum+i)；for(j=0；j<5；j++)scanf(",%f",psco+5*i+j)；}pave=aver；printfC'Wn")；avsco(psco,pave)；avcourl(pcou.psco)；printfC'Wn")；fali2(pcou,pnum,psco,pave)；printfC'Wn")；good(pcou,pnum,psco,pave)；)avsco(psco,pave)float*psco,*pave；{inti,j；floatsum,average；for(i=0；i<4；i++)for(j=0；j<5；j+)sum+=(*(psco+5*i+j))；average=sum/5；*(pave+i)=average；})avcourl(pcou,psco)char*pcou；float*psco；{inti；floatsum,averagel；sum=O；for(i=0；i<4；i++)sum+=(*(psco+5*i))averagel=sum/4；printf("%s%5.2fWnH,pcou,averagel)；)fali2(pcou,pnum,psco