C++编程(部分答案).pdf

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1、谨慎耐心实 验 1-1#include void main(void)coutw”*ncoutn Hello!n;cout”*n)实 验 1-2#include void main(void)int a,b,c,sum;coutHInput a,b,c:“；c in a b c;sum=a+b+c;coutnSum=sumendl;)实 验 1-3#include void main(void)float a,b,l,s;coutHInput a,b:;cin a b;l=2*(a+b);s=a*b;cout,L=,l e n d l;coutS=u s en d l;)实 验 1-4#inc

2、lude void main(void)float f,c;cout请输入华氏温度值：”；cinf;c=(f-32)*5.0/9.0;coutvv”摄氏温度值为：vvccvendl;)实 验 1-5#include void main(void)int n,a,b,c,d,m;coutnInput n:;cinn;a=n/1000;b=(n-a*1000)/100;c=(n-a*1000-b*100)/10;d=n%10;m=d*1000+c*100+b*10+a;coutm=m endl;)实验2-1#include void main(void)int a;coutInput a:;cin

3、a;if(a0)coutvvavv为正数。nn;elsecoutvvavv”为负数。n”;if(a%2=0)coutvav”为偶数。n;elsecoutvvav”为奇数。nn;实验2-2#include#include void main(void)double x,y;coutInput x:;cinx;if(x5)y=-x+3.5;else if(x10)y=20-3.5*(x+3)*(x+3);elsey=x/2.0-3.5+sin(x);coutny=n y en d l;实验2-3#include void main(void)int a,c;float r,m,f;coutvv”请

4、输入奖金数额:；cina;if(a=800)c=8;elsec=a/100;switch(c)case 0:r=0;break;case 1 :r=0.02;break;case 2:case 3:r=0.04;break;case 4:case 5:case 6:case 7:r=0.08;break;case 8:r=0.1;break;)m=a*r;f=a-m;cout 税率：vvrendl;cout 应交税款:vvmendl;coutM 实得奖金:u f en d l;练习3-14#include void main(void)int a,b,c;coutInput a,b,c:n;c

5、 in a b c;if(ab&bc)c o u t a,t b A t c en d l;else if(ac&cb)c o u t a,t c,tbendl;else if(ba&ac)c o u t b ,a,t,c e n d l;else if(bc&ca)c o u t b A t c,t,a e n d l;else if(ca&ab)c o u t c,t a,tbendl;elsec o u t c,t b t a e n d l;练习3-16#include void main(void)float datal,data2,result;char op;coutvv”输入两

6、个实数：”；cindata 1 data2;coutvv”输入运算符：”；cinop;switch(op)case,+,:result=data 1 +data2;break;case-:result=data l-data2;break;case,*,:result=datal*data2;break;case 7*:result=data l/data2;break;)coutdatal opdata2=,resultendl;)练习3-21#i nc l ud e voi d mai n(voi d)i nt i;f l oat t,sum;sum=0;f or(i=l;i=100;i+

7、)t=1.0/i;sum=sum+t;)c out ,S um=,s u m e n d l;)#i nc l ud e voi d mai n(voi d)i nt i;f l oat t,sum;sum=0;i=l；wh i l e (i=100)t=1.0/i;sum=sum4-t;i+；)c o u t S u m=,s u m e n d l;)#i nc l ud e voi d mai n(voi d)i nt i;f l oat t,sum;sum=0;i=l；d o t=1.0/i;sum=sum+t;i+；)wh i l e (i=100);c o u t S u m=s

8、u m e n d l;练习3-22#include void main(void)float x,t,y;coutvv”请输入x 的值(x0)：cinx;t=1.0;y=0.0;while(t=le-4)y=y+t;t=t/x;couty=M y en d l;例题2-26 编写能显示平行四边形图形(图形“钎 组成)的程序。#include void main(void)int i,j,k;for(i=l；i=5;i+)for(k=1;k=5-i;k+)cout*r;for(j=l;j=10;j+)cout*;coutendl;)练习3-24#include void main(void)i

9、nt n,i,j,k;float c,sum,avg;i=0;j=0;k=0;sum=0.0;cout”请输入十天的温度值：”；for(n=1 ;n0)i+；else if(c=0)j+;elsek+;sum=sum+c;)avg=sum/10.0;cout0 度以上天数：u i en d l;coutn0 度天数：vvjvvendl;coutH0 度以下天数：kendl;coutvv”平均温度：avgendl;练习3-25#include void main(void)inti;long int t;float s;s=0;t=l；for(i=l;i=10;i+)t=t*i;s=s+t;co

10、utsendl;练习3-26#include void main(void)int i,j,k;for(i=l;i=33;i+)for(j=l;j=5O;j+)k=100-i-j;if(k%2=0)&(i*3+j*2+k/2=100)c o u t i,t j,t,k en d l;练习3-27#include void main(void)int i,j,k;for(i=l;i=5;i+)for(k=l;k=5-i;k+)cout*r;for(j=1 ;j=2*i-1 ;j+)coutvv*;coutendl;for(i=l;i=4;i+)for(k=l;k=i;k+)coutfor(j=l

11、;j=9-2*i;j+)coutvv*;coutendl;)实验4-1#i nc l ud e#d e f i ne N 10voi d mai n(voi d)i nt i,a,b,c,d,e;f l oat s N;C O U t ”请输入成绩：”；f or(i=0;i N;i+)c i n s i ;a=0;b=0;c=0;d=0;e=0;f or(i=0;i=90&s i =80&s i =70&s i =60&s i =69)d+;e l see+;)c out”各分数段人数为：e nd l;c out vv”优(90 100)：a e n d l;c o u t 良(80-89)：

12、b e nd l;c out vv”中(70-79)：c e nd l;c out”及 格(60-69)：d e nd l;c out vv”不 及 格(0-59)：n e e n d l;实验4-2a#include#include#define N 10void main(void)int i,j,aN,temp;coutvv”请输入数据：”；for(i=0;iN;i+)cinai;for(i=0;iN-l;i+)for(j=O;jaU+l)temp=aj;aj=aj+l;aj4-l=temp;for(i=0;iN;i+)coutsetw(6)ai;coutendl;实验4-2b#incl

13、ude#include#define N 10void main(void)int i,j,alNJ,temp;coutvv”请输入数据：”；for(i=0;iN;i+)cinai;for(i=0;iN-1 ;i+)for(j=i+l;jaUJ)temp=ai;ai=aj;aj=temp;for(i=0;iN;i+)coutsetw(6)ai;coutendl;实验4-3#include#include void main(void)int i,j,a55;ini max,min,maxi,maxj,mini,minj,s;coutvv”请输入数据：”；for(i=0;i5;i+)for(j=

14、O;j5;j+)cinaij;for(i=0;i5;i+)for(j=0y5;j+)coutsetw(6)ai j;coutendl;)max=a00;min=a00;s=0;maxi=O;maxj=O;mini=O;minj=O;for(i=0;i5;i+)for(j=O;jmax)max=ai j;maxi=i;maxj=j;if(aijmin)min=aij;mini=i;minj=j;if(i=j)s=s+aijl;coutm ax=aH m a x i,f,m axj=m axendl;cout,min=,na,m in i,Jnnn m in j,=nm inendl;couts=

15、sendl;实验4-4#include#include#define M 3#define N 3void main(void)int i,j,aMN,bMN,cMN;coutv”请输入A 矩阵数据：”;for(i=0;iM;i+)for(j=O;jN;j+)cinaij;cout请输入B 矩阵数据：for(i=0;iM;i+)for(j=O;jN;j+)cinbij;for(i=0;iM;i+)for(j=O;jN;j+)ciU=aij+biU;cout”C 矩 阵 为:endl;for(i=0;iM;i+)for(j=O;jN;j+)coutsetw(6)cij;coutendl;练习4-

16、11#include#include void main(void)int i,j,a55;for(i=0;i5;i+)for(j=O;j=j)ai 皿=1；elseaij=j-i+l；)for(i=0;i5;i+)for(j=0；j5；j+)cou tsetw(6)a i j;coutendl;练 习4-18#i nc l ud e#i nc l ud e#d e f i ne M 6#d e f i ne N 5voi d mai n(voi d)i nt s M N,i,j,sum,max;c out vv”请输入数据”；f or(i=0;i M-l;i+)f or(j=O;j N-l;

17、j+)c i n s i j ;f or(i=0;i M-l;i+)sum=0;f or(j=l;j N-l;j+)sum=sum+s i f j ;s i 4=sum;)f or(j=l；j N-l;j+)max=s 01 j ;f or(i=0;i max)max=s i j ;s 5 j =max;)c o u t H 学号“vv”数学“vv”语文”夕 卜 语 v v 总成绩 vve nd l;c o u t -nM;f or(i=0;i M-l ;i+)f or(j=O;j N;j+)c out se t w(8)s i j j j ；c out e nd l;c o u t -nu;

18、co u t最高分”；f or(j=l;j N-l;j+)c out se t w(8)s 5 j ;c out e nd l;)练 习4-7#include#define N 10void main(void)intaN,i,k;float sum,ave;coutvv”请输入数据：”；for(i=0;i=N-1 ;i+)cinai;sum=0.0;k=0;for(i=0;i=N-l;i+)sum=sum+ai;if(ai60)k+;ave=sum/N;cout”平均分：aveendl;coutn不及格人数：”kvendl;练习4-8#include void main(void)int a

19、20,i;a0=0;al=0;a2=2;a3=5;for(i=4;i=19;i+)alij=ai-l J+ai-2J+ai-3+ai-4;for(i=0;i=19;i+)if(i%5=0)coutendl;coutai,t,;coutendl;练习4-9a#include#define N 10void main(void)int aN,ij,temp;coutvv”请输入数据：”；for(i=0;i=N-1 ;i+)cinai;for(i=0;i=N-2;i+)for(j=0;j=N-2-i;j+)if(aUaj+l)temp=aj;aj=aj+1;aj+l=temp;for(i=0;i=N

20、-l;i+)coutait,;coutendl;练习4-9b#include#define N 10void main(void)int aN,i,j,temp;COUt”请输入数据：”；for(i=0;iN;i+)cinai;for(i=0;i=N-2;i+)for(j=i+1 ;j=N-l;j+)if(aiaUDtemp=ai;ai=aj;aj=temp;for(i=0;iN;i+)co u tai,t,;coutendl;)练习5-23#include int sum(int n)int s;if(n=l)s=l;elses=n+sum(n-l);return s;)void main(

21、void)int m,total;coutInput m:;cinm;total=sum(m);cout,Total=,totalendl;)练习5-24#include float power(float xjnt n)float p;if(n=0)p=l;elsep=x*power(x,n-l);return p;)void main(void)float y,t;int m;cout*Input x,m:“；cinym;t=power(y,m);cout,t=,t e n d l;实验5-1#include void main(void)int al0,i,k,flag,top,bot,

22、mid,loc;coutvv”输入数组数据:“；for(i=0;i10;i+)cinai;coutvv”输入要查找数据:“；cink;flag=0;top=0;bot=9;while(llag=0&top=bot)mid=(top+bot)/2;if(k=amid)flag=l;loc=mid;break;)else if(kamidj)bot=mid-l;elsetop=mid+1;)if(flag=l)coutloc;elsecoutv”没有找到.”；实验5-2a#include#include void main(void)char str8O,strl 40,str240;coutIn

23、put 2 string:；cin.getline(strl,40);cin.getline(str2,40);strcpy(str,strl);strcat(str,str2);coutstrendl;实验5-2b#include#include void main(void)char str80,strl40,str240;int i,j;coutInput 2 string:1;cin.getline(str 1,40);cin.getline(str2,40);i=0;while(strli!=O)stri=strli;i+；)j=0；while(str2j!=10,)stri=str

24、2j;i+；j+；)st巾coutstrendl;)实验5-3#include#include#define N 8void main(void)int cNN,m,n,k;char space=ffor(n=l;n=N;n+)cnjn=l;cnl=l;)for(m=3;mN;m+)for(n=2;n=m-l;n+)cm n=cm-1 n-1+cm-1 n;for(m=l;mvN;m+)for(k=l;k=(7-m)*4;k+)coutspace;for(n=l;n=m;n+)coutsetw(8)cm n;c out e nd l;实验5-4#i nc l ud e#i nc l ud e#

25、d e f i ne M 7#d e f i ne N 5voi d mai n(voi d)f l oat s M N,sum,ave,max,mi n,t e mp;i nt i,j,k;co u tHInput Dat a:n e n d l;f or(i=0;i M-2;i+)f or(j=O;j N-l;j+)c i n s i j ;f or(i=0;i M-2;i+)sum=0.0;f or(j=l;j N-l;j+)sum=sum+s i j ;ave=sum/(N-2);s i N-l =ave;)f or(j=l；j N-l;j+)max=s 0J j J；mi n=s 0

26、 j ;f or(i=0;i max)max=st i j|j j；i f (s i j mi n)mi n=s i j j；)s M-2J j J=max;s M-l j =mi n;)f or(i=0;i M-3;i+)k=i;f or(j=i+l;j M-2;j+)i f(s k l N-l s j J N-l )k=j；i f(k!=j)f or(j=O;j N;j+)t e mp=s i j ;s i j =s k j ；s k j =t e mp;cout Num.Math.Chin.Engl.Aveg.uendl;cout-nendl;for(i=0;iM-2;i+)for(j=

27、O;jN;j+)coutsetw(6)sij;coutendl;)cout max;for(j=l;jN-l;j+)coutsetw(6)sM-2j;coutendl;cout minu;for(j=l;jN-l;j+)coutsetw(6)sM-1 fj;coutendl;cout-endl;练习5-18#include float ftoc(float f)float c;c=(f-32)*5.0/9.0;return c;)void main(void)float fl,cl;coutInput f:n;cin f 1;cl=ftoc(fl);coutnC=n c l e n d l;)

28、练习5-19int prime(int k)int flag,i;flag=l;for(i=2;i=k-l;i+)if(k%i=0)flag=0;break;)return flag;)#include void main(void)int n;coutnInput n:;cinn;if(prime(n)=l)coutvvnvv”是素数。endl;elsecoutccnvv”不是素数。nendl;)练习5-21#include void main(void)float s;float pfh(int);s=pfh(12)+pfh(15)*pfh(15);cout,s=,s en d l;)fl

29、oat pfh(int n)float p,i;p=0;for(i=l;i=n;i+)p=p+i*i;return p;函数例子#include#include float f(int n)float t,i；t=l；for(i=l;i=n;i+)t=t*i;return t;)float pow(float x,int n)float y;inti;y=l;for(i=l;i=1 e-4);coutnsin(aM)=sendl;练习4-17#include#define N 5void main(void)int aN,i,j,k,tl;float sN,t2;coutvv”输入运动员号码和

30、成绩:”;for(i=0;iN;i+)cinail;cinsi;for(i=0;iN-l;i+)k=i;for(j=i+l;jsU)k=j;if(ki)tl=ai;ai=ak;ak=tl;t2=si;si=sk;sk=t2;for(i=0;iN;i+)couti+lt;coutai,t,;coutsit,;coutendl;练习4-20#i nc l ud e#d e f i ne M 3#d e f i ne N 4#d e f i ne K 3voi d mai n(voi d)i nt a M N,b N K,c M K,i,j,q；c out vv”输入矩阵A nH;f or(i=0;

31、i M;i+)f or(j=O；j N;j+)c i n a i j ;c out vv”输入矩阵B n”；f or(i=0;i N;i+)f or(j=O;j K;j+)c i n b i f j l;f or(i=0;i M;i+)f or(j=O;j K;j+)c i U =0;f or(q=0;qN;q+)c i j =c i j +a i q*b q U ;)c out vv”输出矩阵C n;f or(i=0;i M;i+)f or(j=O;j K;j+)c out c i f j ;c out e nd l;练习4-17B#include#include#define N 5voi

32、d main(void)charsN20,string20;int i,j,k;float aN,t;coutvv”输入运动员号码:n”;for(i=0;iN;i+)cin.getline(si,20);coutvv”输入运动员成绩:n”；for(i=0;iN;i+)coutsiH:n;cinai;for(i=0;iN-l;i+)k=i;for(j=i+l;jaU)k=j；if(ki)t=ai;ai=ak;ak=t;strcpy(string,si);strcpy(si,sk);strcpy(sk,string);)coutvv”名次”vv t vv 号码 vv t vv 成绩 vvendl;

33、for(i=0;iN;i+)couti+lvvt；coutsi,t,;co u t ai 1;coutendl;实验6-1#include#include#define N 10void sortl(int a,int n)int i,j,temp;for(i=0;in-l;i+)for(j=O;jaU+l)temp=aj;aj=aj+l;aj+l=temp;)void sort2(int a,int n)int i,j,temp;for(i=0;in-l;i+)for(j=i+l;jn;j+)if(aiaU)temp=ai;ai=aj;aj=temp;)void sort3(int a,in

34、t n)int i,j,k,temp;for(i=0;in-l;i+)k=i;for(j=i4-l;jaj)k=j;if(ki)temp=ai;ai=ak;ak=temp;void print(int a,int n)inti;for(i=0;in;i+)coutsetw(8)ai;coutendl;)void main(void)intaN,i;coutnInput Array:；for(i=0;iN;i+)cinatij;sortl(a,N);print(a,N);sort2(a,N);print(a,N);sort3(a,N);print(a,N);实验6-2#include doubl

35、e px(double x,int n)double p;if(n=l)p=x;elsep=x-x*px(x,n-l);return p;void main(void)double s,x,int n;coutInput x:;cinx;coutInput n:;cinn;s=px(x,n);couts=sendl;实验6-3A#include#include void str_cat(char s,char si,char s2)strcpy(s,sl);strcat(s,s2);)void main(void)char str8O,strl 40,str220;cout,Input 2 s

36、tring:1;cin.getline(str 1,40);cin.getline(str2,20);str_cat(str,strl,str2);coutstrendl;)实验6-3B#include void str_cat(char s,char sl,char s2)(int i,j;i=0;while(sli!=AO)si=sli;i+；j=0;while(s2j!=W)si=s2j;i+；j+；)si=0;)void main(void)chars80,slL40,s220;coutInput 2 string:;cin.getline(sl,20);cin.getline(s2,

37、40);str_cat(s,s 1 ,s2);coutsendl;实验6-4#include#include double fsin(double x)double s,p,t,k,f;int i;i=l；s=0.0;k=x;t=1.0;f=l；dop=f*k/t;s=s+p;i=i+2;k=k*x*x;t=t*i;f=(-l)*f;)while(fabs(p)=le-10);return s;)void main(void)double x,y;coutInput x:H;cinx;y=fsin(x);coutny=yendi;实验6-5#i nc l ud e#i nc l ud e#d

38、e f i ne N 10l ong f(i nt n)i nt i;l ong t;t=l；f or(i=l;i=n;i+)t=t*i;re t urn t;)i nt c nm(i nt n,i nt m)i nt s;s=f(n)/(f(m)*f(n-m);re t urn s;voi d mai n(voi d)i nt a N N,n,m;f or(n=0;nvN;n+)f or(m=0;m =n;m+)a n m=c nm(n,m);f or(n=0;nN;n+)f or(m=0;m=y)z=x;elsez=y;return z;)#include#include ufilemax

39、.huvoid main(void)float a,b,c,m;coutInput 3 float:n;c in a b c;m=max(max(a,b),c);coutmax=Hm endl;)练习6-6#include#define M(a,b)ab?a:bvoid main(void)int x,y,z,ml,m2;coutHInput x,y,z:;c in x y z;ml=M(x,y);m2=M(ml,z);coutMmax=m2endl;)练习6-7A#include#define S(a,b)a*b#define L(a,b)2*(a+b)void main(void)floa

40、t x,y,area,length;coutInput x,y:n;cin x y;area=S(x,y);length=L(x,y);coutHarea=areaendl;coutlength=lengthendl;练习6-7B#include float areaf(float a,float b)float s;s=a*b;return s;)float lengthf(float a,float b)float 1;l=2*(a+b);return 1;)void main(void)float x,y,area,length;coutHInput x,y:“；cin x y;area

41、=areaf(x,y);length=lengthf(x,y);coutarea=areaendl;coutnlength=lengthendl;练习6-8#include#include#define DEBUG#define L(a,b,c)(a+b+c)#define S(a,b,c)sqrt(b+ca)/2*(a+c-b)/2*(a+b-c)/2*(a+b+c)/2)void main(void)float x,y,z,length,area;coutInput x,y,z:u;c in x y z;length=L(x,y,z);#ifdef DEBUGcoutL=lengthend

42、l;#endifarea=S(x,y,z);coutnLength=lengthendl;coutArea=areaendl;)例 7-61用数组指针的方法求维数组的最大值#include void main(void)int a5=1,6,3,8,0,max,i;int*p;p=a；max=a0;for(i=0;imax)max=ai;coutmaxl=nm axendl;max=p0;for(i=0;imax)max=pi;coutmax2=maxendl;max=*(a+0);for(i=0;imax)max=*(a+i);cout,max3=,m axendl;max=*(p+0);f

43、or(i=0;imax)max=*(p+i);coutnmax4=maxendl;max=*p;for(p=a;pmax)max=*p;coutMmax5=Hm axendl;例 7-10-1#include void main(void)char s40;int i;coutHInput a line string:1;cin.getline(s,40);i=0;while(si!=W)i+；coutnL=iendl;)例 7-10-1#include void main(void)chars40,*p;int n;coutInput a line string:;cin.getline(s

44、,40);p=s；n=0;while(*p!=W)n+;P+；coutsendl;cout,L=,n en d l;例 7-12#include void str_cpy(char*pl,char*p2)while(*p2!=W)*pl=*p2;pl+；p2+;)*pl=W;)void main(void)char strl 80,str280;char*q 1=str 1,*q2=str2;coutInput String2:;cin.getline(str2,80);str_cpy(ql,q2);coutStringl=strlendl;实验7-1#include void main(vo

45、id)int a10,sum,i,*p;float ave;coutHInput array:*;for(i=0;i10;i+)cinai;sum=0;for(i=0;i10;i+)sum=sum+ai;ave=sum/10.0;coutnave 1 =uaveendl;sum=0;for(i=0;i10;i+)sum=sum+*(a+i);ave=sum/10.0;coutnave2=aveendl;p=a;sum=0;for(i=0;i10;i+)sum=sum+*(p+i);ave=sum/10.0;coutave3=Haveendl;sum=0;for(i=0;i10;i+)sum=s

46、um+pi;ave=sum/10.0;sum=0;coutave4=naveendl;for(p=a;pa+10;p+)sum=sum+*p;ave=sum/10.0;coutave5=aveendl;)实验7-2#include void main(void)float a33,sum;int i,j;coutHInput array:*;for(i=0;i3;i+)for(j=O;j3;j+)cinaij;sum=0;for(i=0;i3;i+)sum=sum+*(ail4-i);for(i=0;i3;i+)sum=sum+*(ai+2-i);cout,sum=,sum endl;实验7-

47、3#include void str_cat(char*pl,char*p2)while(*pl!=,0,)pl+;while(*p2!=01)*pl=*p2;pl+;p2+;)*pl=W;)int str_cmp(char*pl,char*p2)int c;while(*pl=*p2&*pl!=A0&*p2!=0,)pl+;p2+;)c=*pl-*p2;return c;int str_len(char*p)int n;n=0;while(*p!=、0)n+;P+；)return n;)void main(void)char strI8O,str28O;char*q 1 =str 1,*q2

48、=str2;int cmp,len;coutInput 1 string:1;cin.getline(strl,80);coutInput 2 string:1;cin.getline(str2,80);cmp=str_cmp(q l,q2);if(cmp=0)coutstr l=str2endl;else if(cmp0)coutnstrl str2endl;elsecoutHstrlstr2endl;str_cat(ql,q2);coutstr 1 endl;len=str_len(q 1);coutlen=lenendl;实验7-4#include void sort 1 (int a,

49、int n)int i,j,k,temp;for(i=0;in-I;i+)k=i;for(j=i+I;jn;j+)if(aki)temp=ai;ai=ak;ak=temp;void sort2(int*p,int n)int i,j,k,temp;for(i=0;in-l;i+)k=i;for(j=i+l;jn;j+)if(*(p+k)i)temp=*(p+i);*(p+i)=*(p+k);*(p+k)=temp;void sort3(int a,int n)int i,j,k,temp;for(i=0;in-l;i+)k=i;for(j=i+l;jn;j+)if(*(a+k)i)temp=*

50、(a+i);*(a+i)=*(a+k);*(a+k)=temp;void sort4(int*p,int n)int i,j,k,temp;for(i=0;in-l;i+)k=i;for(j=i+l;jn;j+)if(pki)temp=pi;pi=pk;pk=temp;)void main(void)int a10,*q,i；coutInput data:;for(i=0;i10;i+)cinai;sort 1 (a,10);for(i=0;i10;i+)co u t atij,t,;coutendl;sort2(aJ0);for(i=0;i10;i+)coutai,t,;coutendl;q