C语言程序设计苏小红版答案解析

1、2.2 #iiiclude<stdio.h>main()float x=25,y=25,z=25; pnntf(Mx=%farx); pnntf(My=%fury); pmitf(”z=%fn”,z);3.1(1) #iiiclude<stdio.h> main()int a=12,b=3;float x=185,y=46;printf(,%d,di,(float)(a*b)/2); pmitf(dn 役(int)x%(mt)y);3.2 #iiiclude<stdio.h>main()int x,b0,bl,b2,s; pnntf(MIiiputx:H);

2、 scanfC%dt&x);b2=x/100; bl=(x-b2*100)/10;b0=x%10; s=b0*100+bl*10+b2;3.3 # iiiclude<stdio.h># mclude<math.h>main()float rate=0.0225;float n,capital,deposit; printf(MIiiput n,capital:H); scanf("%f,%f；&n,&capital); deposit=capital*pow(l+iate,n); printf(Mdeposit=%fji'dep

3、osit);3.4 #iiiclude<stdio.h># mclude<math.h>main()float 久b,c;double x,y;printf(MIiiputa,b,c:H); scanf(H%f,%f,%f&a.&b、&c); x=(-b+sqit(b*b-4*a*c)/(2 *a); y=(-b-sqrt(b*b-4*a*c)/(2*a); pnntfC，x=%fy=%furx,y);4.1(1) #iiiclude<stdio.h>main()char cl=,ac2=,bc3=tc,; printf(,la%cb

4、%cc%cn,c 1 ,c2,c3);4.1 (2) #iiiclude<stdio.h>main()int a=12,b=15; pmHfTa=%d%,b=%d%S”,a,b);4.1 (3) #iiiclude<stdio.h>main()int a、b;scanfC%2d%*2s%2d”,&a,&b); piiDtfp%d.%dir；a,b);4.2 #iiiclude<stdio.h>main()long a,b;float x、y;scanfC%d,%dn 役&a.&b); scanf(H%f,%fur&x.

5、&y); piintf(Ma=%d.b=%d,ii,a.b); pnntfC，x=%fb=%farx,v);5.1 #iiiclude<stdio.h>main()float a;scanf(H%f&a);if(a>=0)a=a; pnntfa=%fn=);elsea=-a; pnntfa=%fn=);5 2 #iiiclude<stdio.h>main()int a;pnntf(HIiiputa:H);scanff%cT；&a);if(a%2=0)prmtf("a 是偶数”)；elsepiuitf("a 是奇数”)；5

6、.3 #iiiclude<stdio.h>#mclude<math.h>main()float a,b,c,s,area; pnntHMIiiputa,b,c:H); scanf(H%f,%f,%f&a,&b,&c); if(a+b>c&&a+c>b&&b+c>a) s=(a+b+c)/2;area=(float)sqrt(s * (s-a) * (s-b)* (s-c);priiitf(naiea=%f.n,area);elsepnntf(”不是三角形”)；5.4 #iiiclude<st

7、dio.h>#iiiclude<math.li>mam()float a、b,c，x,y;pmitfClnputabcJ);if(a=0) pnntf(”该方程不是一元二次方程®”)；if(b*b-4*a*c>0) x=(-b+sqrt(b *b-4*a *c)/(2*a); v=(-b-sqrt(b*b-4*a*c)/(2*a); pnntfx=%f,y=%fm 役x，y);else if(b*b-4*a*c=0)x=-b/(2*a);v=-b/(2*a); pnntfx=%f,y=%fm 役x，y);else pnntf(”该方程无实根n”)；5.5 #i

8、iiclude<stdio.h>main()int yeai;flag;printf(MIiiput a vear:H);scanfd&yeai);if(y 亡 ai%4=0&&yeai-%400! =01 |year%400=0) flag=l;elseflag=0;if(flag=l)piiiitf(n%d is a leap year !n”,yeaQ;elsepiiiitf(,%d is not a leap year lyear);5.6 #iiiclude<stdio.h>main()int yeai;flag;printf(MIii

9、put a vear:H);scanfld&yeai);flag=veai-%400=0|year%4=0&&y 亡 ai%100!=0H:0;if(flag=l && flag! =0)priiitf(n%d is a leap year !n,vear);elseis not a leap year lyear);5.7 #iiiclude<stdio.h>main()char ch;pnntf(MIiiputch:H);scanf(”c-&ch);if(ch>=,a,&&ch<=N)ch=getcha

10、i();ch=ch32;printf(n%c,%dn,ch,ch);else if(ch>=,A,&&cli<='Zf)ch=getchai();ch=ch+32;printf(n%c,%dn,ch,ch);elsepnntff%L，ch);5 8 #iiiclude<stdio.h> main()char ch; pnntf(MIiiputch:H); scanf(”ct&ch);if(ch>=48&&ch<=57)pruitf("ch是数字字符n");else if(ch>=65&

11、amp;&ch<=90)pimtfC'ch是大写字母n");else if(ch>=97&&ch<=122) pnntf(”ch是小写字母n");else if(ch=32)printf(” ch 是空格 n”);else pimtfC'ch是其他字符n”);5.9 #iiiclude<stdio.h>main()int score,grade; printf(MIiiput score:n); scanf(H%d,&scoie); grade=score/10; if(score<0| s

12、core> 100)priiitf(nInput enornH);if(score>=90&&score<= 100)prmtf(H%d-Aii,score);else if(score>=80&&score<90)(nH<ormuud& use。Vo<DSCO-6<DSCO 二 T<usco(nH<?mund二 QSCO 小 QseoL<DSCOL<usco00QseoOT<DSCO (quourtTCQA)q0ws) "(MquTOU- mkmd(OHVqluou

13、二 一 e t cqnrosJT YqnKHU$HCQA$='p%,p%kueos "(qluomcQA mduLuudqluourl-TUQA.s)OUTUlu cq.oTplsvQpnpn%OT.Z 宀?OOS.Mg:p<=)七 ln.Td) (09VQoos$5>OHCQ】oosm Qso 益oostuCI:p<)七 und) (oz>Q】oos$09Ho】oosm<USR i?TOOSxuo:p 贾.)七 und) (08VQ】oos$OLH<9】oosm<USR i7oosruq:p*k-undcase 2:if(year%

14、4=0&&yeai-1=01 |yeai-%400=0) prmtf("29 天n”)；elseprmtf("28 天n”)；break;default:prmtf(nIiiput enoriiH);6.1(1) #mclude<stdio.h>main()int ijjc;char space-:fbr(i=l;i<=4;i-H-)for(j=lj<=iJ+)pimtf("%c",space);for(k=l ;k<=6;k+)pnntf(”n");6.1(2) #iiiclude<stdi

15、o.h>main()int k=4,n;fbr(n=0;n<k;n-H-)if(n%2=0) continue;k-;6.1(3) #mclude<stdio.h> main()int k=4,n;fbr(n=O ;n<k;n+)if(n%2=0) break; k-; printf(,k=%d.n=%d,n,k.n);6.2(1) #iiiclude<stdio.h> main()int i.sum=O;fbr(i= 1 ;i<= 101 ;i+)sum=sum+i; printf(MsiHii=%dn,sum);6.2(2) #mclude&

16、lt;stdio.h> main()long i；long term,sum=0; fbr(i= 1 ;i<= 101 ;i=i+2) term=i*(i+l)* (i+2); sum=sum4-term;printf(Msum=%ldii,sum);6.2(4) #include<stdio.h>#mclude<math.h> main()int n=l;float term= 1.0,sign= 1 .sum=0; while(term<=-1 e-4|term>= 1 e-4) term=1.0/sign; sum=sum-rterm; s

17、ign=sign+n:n+;printf(Msum=%fn,sum);6.2(5) #iiiclude<stdio.h># iiiclude<math.h>main()int n=l,count=l;float x;double sumjerm;pnntf(MIiiput x:H);scanf(H%f&x);sum=x;term=x;doterm=-term*x*x/(n+ sum=sum+term;n=n+2;count+;wliile(fabs(tenn)>= 1 e-5); printf(Msm(x)=%f,count=%d,di,sum,count

18、);6.3 #iiiclude<stdio.h>main()int x=l,fiiid=0;if(x%2= 1&&X %3=2&&x%5=4&&x%6=5&&x%7=0) prmtf(Hx=%dn,x);find=l;x+；/* int x.find=0;for (x= 1;! find ;x+)if(x%2= 1&&X %3=2&&x%5=4&&x%6=5&&x%7=0) prmtf(Hx=%dn,x);find=l;*/6.4 #iiiclude<

19、;stdio.h>main()int i； long p=l ,m=l;pnntf(MIiiput n:H); scanfC%dJ&ii);fbr(i=l;i<=n;i-H-)p=l*l;piintfCp=%d .m=%dn"6 5 #iiiclude<stdio.h>main()float c、f;fbr(c=-40;c<=110;c=c+10)&9/5 陀+32;printf(”6.6 #iiiclude<stdio.h># mclude<math.h>main()int n;double c=0.01875衣

20、dox=x*pow( l+c,12)-l 000; n+;wlule(x>0); pnntffx=%diU,x);6.7 #iiiclude<stdio.h>main()int n=0;float a=100.0、c; pnntf(MIiiputc:H); scanf(H%f&c); doa=a*(l+c); n+; wliile(a<=200);prmtf(nn=%dirn);6.8 #iiiclude<stdio.h># mclude<math.h>main()int n=l,count=l;double sum= 1 ,term=

21、1; while(fabs(term)>= 1 e-5) term=pow(-l,count) *( 1.0/(n+2); sum=sum4-term;n=n+2; count+;sum=4*sum;printf(nsum=%fcount=%dnH,sum,count);6.9 #iiiclude<stdio.h># mclude<math.h>main()int n=l,count=l;double sum= 1 ,term= 1;while(fabs(tenn)>= 1 e-5)term=tenn*(l .0/n);sum=sum4-term;I1+;

22、count+;printf(Msum=%fcount=%d'n,sum.count);6.10 # include<stdio.h># mclude<math.h>niam()int x;fbr(x= 100;x<=999;x+)if(x=pow(x/100、3)+pow(x/ 10%l 0、3)+pow(x% 103) pnntffx=%diV,x); 6.11 #iiiclude<stdio.h>main()int i=0.n;long sum=0jerm=l;pnntf(MIiiputn:H);scanff%cr',&ii

23、);doi+；term=tenn*i;sum=sum-rterm;wliile(sum<n);6.12 #include<stdio.h>main()int i,njiKcount=0.sum=0;pnntf(MIiiput n:M);scanff%cr',&ii);fbr(i=l;i<=n;i+)pnntfClnputm');scanfC%d”,&m);if(m>0)sum=sum+m;count+;elsebreak;prmtf(nsum=%d,count=%dii,sum,count);6.13 # include<st

24、dio.h>main()mt i,naiKcount=0.sum=0;pnntf(MIiiputn:H);scanff%cr',&ii);for(i=l;i<=n;i-H-)if(m>0|m<0)sum=sum+m;count+;elsebreak; piiiitf(nsum=%clxount=%dii,sunLcount);6.14 # iiiclude<stdio.h>main()int x,y,z;fbr(x=O;x<= 17 ;x+)fbr(y=O;y<=25;y+) 3*x+2*y+z=50; z=30-x-y;if(

25、3 *x+2*y+z=50&&x+y+z=30) pdntfpx=%d,y=%d,z=%dn-xyz);6.15 # include<stdio.h>main()int x,y;fbr(x=0;x<=98;x+)y=98-x;2*x+4*y=386;if(x+y=98&&2*x+4*y=386)pnntffx=%d,y-%diT,x,y);6.16 # iiiclude<stdio.h>main()int x,y,z;fbr(x=0;x<=20;x+)for(y=0;y<=33;y+)3 *y+5 *x+z/3.0= 1

26、00;z=100-x-v；if (5*x+3*y+z/30=100&&z+x+y=100) pdntfCx=%cLy=%d、z=%dn 役x，y,z);6.17 # iiiclude<stdio.h>main()int x,y,z;fbr(x= 1 ;x<=9;x+)for(y= 1 ;y<= 17 ;y+)10*x+5 * v+z= 100:J7z=50-x-y;if( 10*x+5 *y+z= 100&&x+y+z=50&&z>0)pHitf(”x=%d,y=%d,z=%diT，xyz);7.1 #iiiclud

27、e<stdio.h>mt Squaie(int i)return i*i;mt mam()mt i=O;i=Squaie(i);fbr( ;i<3;i+)static iiit i=l;i-r=Squaie(i);return 0;7.2 #iiiclude<stdio.h>mt houraiiiiiute.second;void updateQsecond+;if(second=60)second=0;niuiute+;if(nunute=60)nuiiute=0;hour+；if(houi-=24)houi=0;void display()piintf(M%d

28、.%d,%dnn,hoinniinute,second);void delay()mt t;fbr(t=0;t<100000000;t+);mt mam()int i;void updaye(),display(),delayO； foi(i=0;i<1000000;i+)updateQ;displayO； delav();return 0;7.3 #iiiclude<stdio.h>int GetMax(int a,int b);mt mam()int xymax; piintfplnputxy J; scanfC%d,%d'',&x,&

29、;y); max=GetMax(x,y); printf(,max=%dn,niax); return 0;mt GetMax(iiit n)return m;elsereturn n;7.4 #iiiclude<stdio.h>mt LCM(iiit njnt m);mt mam()int a、b;pnntf(MIiiputa,b:H); scanfC%d,%d”,&a,&b);printf(”dir,LCM(a,b); return 0;mt LCM(iiit njnt m)liltmt fiiid=O; fdr(x=l;!fuid;x+)if(x%n=O&am

30、p;&x%m=O) find=l;return x-1;7 5#include<stdio.h>long Fact(mt n);mt mam()mt m,a; pinitff'InpiHmJ); scanfC%cT、&m); fbr(a=l ;a<=m;a+)pimtf(M%d! =%ldn,a,Fact(a); return 0;long Fact(mt n)int i; longresult=l; fdr(i=2;i<=n;i+) result*=i;return result;7.6 #iiiclude<stdio.h>long

31、 Fact(mt n);mt mam()int m;long ret; pmitfflnpiiun)； sc£mfC%dt&m); ret=Fact(m); pnntf(Mret=%dii,ret);return 0;long Fact(mt n)int i;long iesult=l,sum=0;fbr(i=2;i<=n;i+)result*=i; sum=sum4-iesult;return sum;7.7(1) #mclude<stdio.h>mt Gcd(iiit ajnt b);mt mam()int 11141；printf(MIiiputni.

32、n: ”)； scanf("%d,%d 役&叫&n);return 0;mt Gcd(iiit ajnt b)int hmm 血 d=0; niui=a<b°a:b; t=inui;fbr(t=niHi;! find;)a%t=O;b%t=O;if(a%t=O&&b %t=0) return t;find=l;7.7(2) #iiiclude<stdio.h>mt Gcd(iiit ajnt b);mt mam()int 11141；printf(MIiiputni.n: ”)； scanf("%d,%d 役&am

33、p;叫&n);piintf(M%d,di,Gcd(m,n); retuin 0;mt Gcd(int ajnt b)int r,temp: r=a%b;唤0)return b;elsedo temp=b;b=r； a=temp;r=a%b; while(r!=0); return b;8.1(1) #iiiclude<stdio.h> void Func(iiit x)x=2;mt mam()mtx=10;Func(x);retuin 0;8.1(2) #mclude<stdio.h> void Func(iiit b)mtj； for(j=0j<4j+)

34、b)=J；mt mam()static mt a=5,6、7,8，i; Func(a);fbi(i=0;i<4;i+)return 0;&2(1)mt PositiveNum(mt a,iiit n)int i,count=0;for(i=0;i<n;i+)if(ai>0)count+;return 0;8.2(2) void Fib(long fJong n)int i;f0=0;for(i=2;i<n;i+)8.2(3) #iiiclude<stdio.h>mt mam()int al 0.n4iiax4iiin,maxPosjiunPos;fb

35、i(n=0;n<10;n+)scanf(”d=&aii);max=niiii=a0;maxPos=iniiiPos=0;fbi(n=0;n<10;n-H-)if(an>max)niax=an;niaxPos=n;else if(an<iiiin)nmi=an;nmiPos=n; printf(,max=%d,pos=%clii,maxjnaxPos); piintf(,min=%d.pos=%d,'iin4iiui4iiinPos);return 0;8.3 void DivAiray(iiit *pAiray,int n)int i;for(i=0;i

36、<n;i+)pArrayi/=pAttayO;8.4 #iiiclude<stdio.h>define N 40mt FailNum(mt score,iiit n);void ReadScore(int score.iiit n);mt mam()int scoreN.n; pnntf(MIiiput n:H); scanff%cT,&ii);ReadScore(score.n);FailNum(score.ii);piintfTailNum students are %d'diH,FailNum(score,n); return 0;mt FailNum(

37、mt score,iiit n)int i,count=0; for(i=0;i<n;i+) if(scorei<60)count+;return count;void ReadScore(int score.iiit n)int i;printf(MIiiput score:n);for(i=0;i<n;i+)scaiif(,%d,&scoiei);8.5 #iiiclude<stdio.h>#define N 40mt HigliAxrer(int score.iiit n);mt ReadScoie(int score);mt mam()int sc

38、oreN.n;n=ReadScore(score);piintH'HigliAver students are %dii,HigliAver(scoreji); return 0;mt HigliAxrer(int score.iiit n)mt i,count=0,sum=0,aver;for(i=0;i<n;i+)sum=sum-r sc ore i;avei-sunVn;fbr(i=0;i<n;i-H-)if(scorei>aver)count+;return count;mt ReadScoie(int score)int i=-l;dopiintff'

39、;Input score:M);scanf("%d”,&scoiei);while(scorei>=0); return i;8.6 #iiiclude<stdio.h>#define N 40mt ReadScore(int scoreJong num);mt FindMax(mt scoreJong numjnt n);mt mam()int scoreN.nanaxjiunKt;long numN: t=FmdMax(scoie,n);max=scoiet;num=numt;printf(Mmax=%d,num=%dii,max4ium); retur

40、n 0;mt ReadScoie(int scoreJong num)int i=-l;dopnntff'Input student's ID and score:H); scanf(M%ld%d,&numi,&scorei);wliile(numi>0&&scorei>=0); return i;mt FindMax(iiit scoreJong numjnt n)int maxj;max=score0;for(i=l;i<n;i+)if(scorei>max) niax=scorei;return i;8.7 #iii

41、clude<stdio.h>#define N 40mt Read(mt a);mt ChangeAiry(int a,int n);mt mam()int aN,n;piintf(,%d,di,ChangeAriy(a 卫); return 0;mt Read(mt a)mt i;for(i=0;i<9;i+)prmtf<nIiiput a:,r); scanf(”d=&ai);return i;mt ChangeAiry(int a,int n)mt max4iiinjjiiaxpos4iiiiipos,term; max=niHi=score 0; for

42、(i=l;i<n;i+)if(ai>niax) niax=scorei;niaxpos=n; else(ai<nuii) min=ai; niuipos=n; temp=maxpos; niaxpos=nunpos; niuipos=temp; retuin ai;8.10 # iiiclude<stdio.h>#define N 5 void main()int aNN;int sum = 0;pnntf(M请输入一个d*%d的矩阵n”NN);fbr(i = 0; i < N; i+)for(j = 0;j<N;j+)scanfCd&ati)

43、;fbr(i = 0; i < N; i+)for(j = 0;j<N;j+) if(1=j|i+j=N-l) sum=sum+aij;对角线元素之和为：%dirsum);8.11 # iiiclude<stdio.h>define N 2define M 3void main()mt aNM.bNM;int ij,suml=0,suni2=0.sum=0;printf(M请输入一个%d *%d的矩阵1卩,N,M);fbr(i = 0; i<N; i+)for(j = 0; j< M; j+)scanf(n%dn5&aij);sum 1 =suml+

44、aiIj;请输入一个d*%d 的矩阵iT,N、M);fbr(i = 0; i <N; i+)for(j = 0;j <M; j+)scanf(n%dH5&bij);sum2=sum2 十 a 1 j ;sum=suml +suni2;printf(Msum=%dii,sum);8.12 # iiiclude<stdio.h>#define N 7void YangHui(mt aNNJ.mt n);void main()int ijAbNN;piintf(MIiiput n:H);scanff%cT',&ii);YangHui(bji);for(

45、i=0;i<n;i+)for(j=Oj<=iJ+)void YangHui(mt aNN.mt n)inti j;fbr(i=O;i<n;i-H-)ai0=l； aii=l; fbr(i=2;i<n;i-H-)for(j=lj<ij+) aij=ai-lj-l+ai-l|j；8.13 # iiiclude<stdio.h>define N 12void main()int i; intfN=l,l;pmitf(”d %d m”丄);fbr(i=2;i<N;i+)fi=fi-l+fi-2; pnntfd %cTm”,i+1 卫 i);8.14 #i

46、nclude<stdio.h># iiiclude<stdlib.h># iiiclude<tmie.h>#define N 6000void main()int aN,i;int bl=0,b2=0，b3=0,b4=0,b5=0,b6=0;float php2,p3、p4,p5,p6;srand(time(NULL);fb【(i=0;i<N;i+)ai=rand()%6+l;pnntf(M%3dM?ai);if(ai=l)bl+;if(ai=2)b2+;if(ai=3)b3+;if(ai=4)b4+;if(ai=5)b5+;if(ai=6)b6+;p

47、l=(floa t)(b 1/6000.0);p2=(floa t:)(b2/60000);p3=(floa t:)(b3/6000.0);p4=(float)(b4/6000.0);p5=(floa t)(b5/6000.0);p6=(float)(b6/6000.0);pnntf(”骰子出现1的概率：.2fn”,pl);pnntf(”骰子出现2的概率：%.2fii",p2);pnntf(”骰子出现3的概率：.2fn”,p3);pnntf(”骰子出现4的概率：%.2fii",p4);pnntf(”骰子出现5的概率：.2fn”,p5);pnntf(”骰子出现 6 的概率：%

48、.2fii",p6);9.1(1) void Swap(iiit *xjnt *y)mt *pTenip/*pTemp未进行初始化，*pTemp指向哪里位置 *pTenip=*x;*x=*v;J 7*y=*pTemp;9.1(2) void Swap(iiit *v)int *pTenip; pTemp=x: x=y;v=pTemp;/错误，x,y没有指向类型9.2 #iiiclude<stdio.h>mt mam()inta=l,2,3,4,5;int *p=a;pnntf(M%d.%d,%d,%d,%d,%d.%d,ir*p,*(+p),(*p)+/p,*p-,-(*

49、p)5*p); return 0;9.3 #iiiclude<stdio.h>void Swap(iiit *y)；iiit mainQinta6=l,2,3,4,5,6,b 6= 11,22,33,44,55,66;int i;pnntfC'Before Airay nH);fbr(i=0;i<6;i-H-)fbr(i=0;i<6;i-H-)printf(”dn",bi);fbr(i=0;i<6;i-H-)Swap( &ai,&bi);pnntf(MAfter Airay n”)；fbr(i=0;i<6;i-H-)fbr(

50、i=0;i<6;i-H-)pnntf(”dir,bi);return 0;void Swap(iiit *y)int temp; temp=*x; *x=*y;*y=temp;9.4 #iiiclude<stdio.li>#define N 10void FmdMaxMm(int a,int *pMaxajnt *pMaxiium,iiit iiit mainQint aN;int ijnaxajiiHiajnaxnumjiuimum; pnntf(MIiiput a:M);for(i=0;i<10;i+)scanfC%cT；&ai);F indMaxNIm(a

51、.&maxa、&maxnum, & muia, &minnum); piintf(Mmaxa=%d4iiaxiium=%d4iiiiia=%d4iiuiniim=%dn,maxajiiaxiiunLniuia4iiuinum);return 0;void FmdMaxMm(int a,int *pMaxajnt *pMaxiium,mt *pMma,mtmt i;*pMaxa=a0; *pMuia=a0; *pMaxnum=0: *pMuuium=0; for(i=0;i<10;i+)if(ai>*pMaxa)*pMaxa=ai;*pMaxiium=

52、i;*pMina=ai;*pMumum=i;10.1 void MYStrcpy(chai *dstStr,const char *srcSti)while (*dstStr+=*srcStr+)!-0*)10.2 # include<stdio.h>main()char *a=,rmainOcliar *a=% c% s% c;printf(a345a,34);M;prmtf(a,34,a34);10.3(1) unsigned int MyStrlen(char *p)main()unsigned mt len;len=0;fbr(; *pa! =70：pa+)len+;return len;10.3(2) unsigned int MyStilen(char s)char *p=s;while(*p!=f)P+;return (p-*p);10.3(3) iiit MyStrcmp(cliar *pl,cliar *p2)fbr(; *p l=*p2 ;p 1 +,p2+)i耳*pl='0Jleturn -1;return 1;10.3(4) iiit MyStrcmp(cliar s,char t)int i;fbr(i=0;si=ti;i+)if(si=0*) return 0;return i;10.3(5) #incl