《c程序设计》谭浩强答案

第一章题#include<iostream>usingnamespacestd;intmain(){cout«'This"«"is";cout«"a"«"C++";cout«"program.";return0;题#include<iostream>usingnamespacestd;intmain(){inta,b,c;a=10;b=23;c=a+b;cout«"a+b=";cout«c;cout«endl;七题#include<iostream>usingnamespacestd;intmain(){inta,b,c；intf(intxjntyjntz);cin»a»b»c;c=f(a,b,c)；cout«c«endl;return0;)intf(intxjntyjntz){intm;if(x<y)m=x;elsem=y;if(z<m)m=z;return(m);)题#include<iostream>intmain()infa,b,c；cin»a»b;c=a+b;cout«"a+b="«a+b«endl;return0;)题#include<iostream>usingnamespacestd;intmain(){inta,b,c；intadd(intxjnty);cin»a»b;c=add(a,b);cout«"a+b="<<c«endl;return0;)intadd(intxjnty){intz;z=x+y;return(z);题#include<iostream>usingnamespacestd;intmain(){charcl='a'/c2='b'/c3='c',c4-\101',c5='\l16';cout«cl<<c2«c3«'\n';cout«"\t\b"«c4«'\t'«c5«'\n';return0;}题#include<iostream>usingnamespacestd;intmain(){charcl=C,c2='+',c3='+'；cout«"lsay:\,"«cl«c2«c3«'\'";cout«"\t\t"«"Hesays:\"C++isveryinteresting!\""«'\n';return0;)题#include<iostream>{inti,j,m,n;i=8;j=10；m=++i+j++;n=(++i)+(++j)+m;cout«i«'\t'«j«'\t'«m«'\t'«n«endl;return0;)题#include<iostream>usingnamespacestd;intmain(){charcl='C',c2='h',c3='i',c4='n',c5='a';cl+=4;c2+=4;c3+=4;c4+=4;c5+=4;cout«"passwordis:"<<cl«c2«c3«c4«c5«endl;return0;)题#include<iostream>#include<iomanip>usingnamespacestd;intmain(){floath,r,l,s,sq,vq,vz;constfloatpi=3.1415926;cout«"pleaseenterr,h:";cin»r»h;l=2*pi*r;s=r*r*pi;sq=4*pi*r*r;vq=3.0/4.0*pi*r*r*r;vz=pi*r*r*h;cout«setiosflags(ios::fixed)«setiosflags(ios::right)«setprecision(2);cout«"l="«setw(10)«l«endl;cout«"s="«setw(10)«s«endl;cout<<"sq="«setw(10)«sq«endl;cout«"vq="«setw(10)«vq«endl;cout«"vz="«setw(10)«vz«endl;return0;)题#include<iostream>{floatc,f;cout<ぐ请输入一个华氏温度:“；cin»f;c=(5.0/9.0)*(f-32); 〃注意5和9要用实型表示,否则5/9值为〇cout<<"摄氏温度为:"<<c«endl;return0;)；题#include<iostream>usingnamespacestd;intmain(){charcl,c2;coutくぐ请输入两个字符cl,c2:";cl=getchar(): 〃将输入的第一个字符赋给clc2=getchar(): 〃将输入的第二个字符赋给c2cout<〈"用putchar函数输出结果为:"；putchar(cl);putchar(c2);cout«endl;cout<<"用cout语句输出结果为:"；cout«cl«c2«endl;题另ー解#include<iostream>usingnamespacestd;intmain(){charcl,c2;cout<ぐ请输入两个字符cl,c2:";cl=getchar(); 〃将输入的第一个字符赋给clc2=getchar(); 〃将输入的第二个字符赋给c2cout«"fflputchar函数输出结果为:"；putchar(cl);putchar(44);putchar(c2);cout«endl;cout«"fflcout语句输出结果为:";cout«cl<<","«c2«endl;return0;)题#include<iostream>usingnamespacestd;intmain(){charcl,c2;intil,i2; //cout＜ぐ请输入两个整数H,i2:";cin»il»i2;cl=il;c2=i2;cout<<"按字符输出结果为:"<<cl<<","<<c2«endl;return0;)题#include<iostream>usingnamespacestd;intmain(){inta=3,b=4,c=5,x,y;cout«(a+b>c&&b==c)«endl;cout«(a|Ib+c&&b-c)«endl;cout«(!(a>b)&&!c||l)«endl;cout«(!(x=a)&&(y=b)&&0)«endl;cout«(!(a+b)+c-l&&b+c/2)«endl;return0;)题include<iostream>usingnamespacestd;intmain(){inta,b,c;cout«"pleaseenterthreeintegernumbers:";cin»a»b»c;if(a<b)if(b<c)cout«"max="«c;elsecout«"max="«b;elseif(a<c)cout«"max="«c;elsecout«"max="«a;cout«endl;return0;)另ー解#include<iostream>usingnamespacestd;intmain(){inta,b,c,temp,max;cout«"pleaseenterthreeintegernumbers:";cin»a»b»c;temp=(a>b)?a:b; /・将a和b中的大者存入temp中・/max=(temp>c)?temp:c; /・将a和b中的大者与c比较,最大者存入maxcout«"max="<<max«endl;return0;}题#include<iostream>usingnamespacestd;intmain(){intx.y;cout«"enterx:";cin»x;if(x<l){y=x;cout«"x="«x«",y=x="«y;)elseif(x<10) //1<x<10{y=2*x-l;cout«"x="«x«",y=2*x-l="«y;}else //x>10{y=3*x-l1;cout«"x="«x«",y=3*x-ll="«y;cout«endl;return0;)3.11题#include<iostream>usingnamespacestd;intmain(){floatscore;chargrade;cout«"pleaseenterscoreofstudent:";cin»score;while(score>1001|score<0){cout«"dataerror,enterdataagain.";cin»score;}switch(int(score/10)){case10:case9:grade='A';break;case8:grade='B';break;case7:grade='C';break;case6:grade='D';break;default:grade='E';}cout«"scoreis"«score«",gradeis"«grade«endl;return0;3.12题#include<iostream>usingnamespacestd;intmain(){longintnum;intindiv,ten,hundred,thousand,ten_thousand,place;/・分别代表个位,十位,百位,千位,万位和位数7cout«"enteraninteger(〇〜99999):";cin»num;if(num>9999)place=5;elseif(num>999)place=4;elseif(num>99)place=3;elseif(num>9)place=2;elseplace=l;cout<<"place="«place«endl;〃计算各位数字ten_thousand=num/10000;thousand=(int)(num-ten_thousand*10000)/1000;hundred=(int)(num-ten_thousand*l0000-thousand*l000)/100;ten=(int)(num-ten_thousand*l0000-thousand*l000-hundred*100)/10;indiv=(int)(num-ten_thousand*10000-thousand*l000-hundred*100-ten*l0);cout«"originalorder:";switch(place){case5:cout«ten_thousand«","«thousand«","«hundred«","«ten«","«indiv«endl;cout«"reverseorder:";cout<<indiv«ten«hundred«thousand«ten_thousand«endl;break;case4:cout«thousand«","«hundred«","«ten«","«indiv«endl;cout«"reverseorder:";cout«indiv<<ten«hundred«thousand«endl;break;case3:cout«hundred«","«ten«","«indiv«endl;cout«"reverseorder:";cout<<indiv<<ten«hundred«endl;break;case2:cout<<ten«","«indiv«endl;cout«"reverseorder:";cout<<indiv«ten<<endl;break;case1:cout«indiv«endl;cout«"reverseorder:";cout«indiv«endl;break;)return0;)3.13题#include<iostream>usingnamespacestd;intmain(){longi; 〃i为利润floatbonus,bon1,bon2,bon4,bon6,bon10;bon1=100000*0.1; 〃利润为!0万元时的奖金bon2=bon1+100000*0.075; 〃利润为20万元时的奖金bon4=bon2+100000*0.05; 〃利润为40万元时的奖金bon6=bon4+100000*0.03; 〃利润为60万元时的奖金bon10=bon6+400000*0.015; 〃利润为100万元时的奖金cout«"enteri:";cin»i;if(i<=100000)bonus=i*0.1; 〃利润在10万元以内按10%提成奖金elseif(i<=200000)bonus=bonl+(i-l00000)*0.075;〃利润在10万元至20万时的奖金elseif(i<=400000)bonus=bon2+(i-200000)*0.05; 〃利润在20万元至40万时的奖金elseif(i<=600000)bonus=bon4+(i-400000)*0.03; 〃利润在40万元至60万时的奖金elseif(i<=1000000)bonus=bon6+(i-600000)*0.015;〃利润在60万元至100万时的奖金elsebonus=bonl0+(i-1000000)*0.01:〃利润在100万元以上时的奖金cout«"bonus="«bonus«endl;return0;}3.13题另ー解#include<iostream>usingnamespacestd;infmain(){longi;floatbonus,bon1,bon2,bon4,bon6,bonl0;intc;bonl=100000*0.1;bon2=bon1+100000*0.075;bon4=bon2+200000*0.05;bon6=bon4+200000*0.03;bonl0=bon6+400000*0.015;cout«"enteri:";cin»i;c=i/100000;if(c>10)c=10;switch(c){case0:bonus=i*0.1;break;case1:bonus=bonl+(i-l00000)*0.075;break;case2;case3:bonus=bon2+(i-200000)*0.05;break;case4;bonus=bon4+(i-400000)*0.03;break;bonus=bon6+(i-600000)*0.015;break;bonus=bonlO+(i-l000000)*0.01;}cout«"bonus="<<bonus«endl;return0;)题#include<iostream>usingnamespacestd;intmain()cout«"enterfournumbers:";cin»a»b»c»d;cout«"a="«a<<",b="«b«",c="«c«",d="«d«endl;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;}cout«"thesortedsequence:"«endl;cout«a«","«b«","«c«","«d«endl;return0;}题#include<iostream>usingnamespacestd;intmain()cout«"pleaseentertwopositiveintegernumbersn,m:";cin»n»m;if(n<m){temp=n;n=m;m=temp; 〃把大数放在n中,小数放在m中}P=n*m; 〃先将n和m的乘积保存在p中,以便求最小公倍数时用while(m!=0) 〃求n和m的最大公约数{r=n%m;n=m;m=r;}cout«"HCF="«n«endl;cout«"LCD="«p/n«endl; //p是原来两个整数的乘积return0;}题#include<iostream>usingnamespacestd;intmain(){charc;intIe卄ers=0,spQce=0,digit=0,other=0;cout«"enteroneline::"«endl;while((c=getchar())!='\n'){if(c>='a'&&c<='z'IIc>='A'&&c<='Z')Ie卄ers++;elseif(c==,')space++;elseif(c>='0'&&c<='9')digit++;elseother++;}cout«"letter:"«letters«",space:"«space«",digit:"«digit«",other:"«other«endl;return0;)题#include<iostream>usingnamespacestd;intmain(){inta,n,i=l,sn=0,tn=0;cout«"a,n=:";cin»a»n;while(i<=n)〃赋值后的tn〃赋值后的tn为i个a组成数的值sn=sn+tn: 〃赋值后的sn为多项式前i项之和a=a*10;++i；)cout«"a+aa+aaa+...="«sn«endl;return0;)题#include<iostream>usingnamespacestd;intmain(){floats=0,t=l;intn;for(n=l;n<=20;n++)(t=t*n; /Z求n!s=s+t; //将各项累加}cout«"l!+2!+...+20!="«s«endl;return0;

题#include<iostream>usingnamespacestd;intmain(){inti,j,k,n;cout«"narcissusnumbersare:"«endl;for(n=100;n<1000;n++){i=n/100;j=n/10-i*10;k=n%10;if(n==i*i*i+j*j*j+k*k*k)cout«n«"";)cout«endl;return0;)题#include<iostream>usingnamespacestd;intmain(){constintm=1000; //定义寻找范围intk1,k2,k3,k4,k5,k6,k7,k8,k9,kl0;inti,a,n,s;for(a=2;a<=m;a++)〃。是27000for(a=2;a<=m;a++)〃。是27000之间的整数,检查它是否为完数{n=0;s=a;for(i=l;i<a;i++)if(a%i==0){n++;{n=0;s=a;for(i=l;i<a;i++)if(a%i==0){n++;s=s-i;之和switch(n){case1:kl=i;break;k2=i;break;k3=i;break;k4=i;break;k5=i;break;k6=i;break;k7=i;break;〃s用来存放尚未求出的因子之和,开始时等于。/Z检查i是否为。的因子//如果i是。的因子〃n加1,表示新找到ー个因子〃5减去已找到的因子,s的新值是尚未求出的因子/Z将找到的因子赋给kl，…,klO/Z找出的笫1个因子赋给kl/Z找出的笫2个因子赋给k2/Z找出的笫3个因子赋给k3/Z找出的笫4个因子赋给k4/Z找出的笫5个因子赋给k5/Z找出的笫6个因子赋给k6/Z找出的笫7个因子赋给k7k8=i;break; 〃找出的笫8个因子赋给k8k9=i;break;〃找出的笫9个因子赋给k9case10:kl0=i;break;〃找出的笫10个因子赋给klO))if(s==0) 〃s=0表示全部因子都已找到了{cout«a«"isa完数’"endl;cout«"itsfactorsare:";if(n>l)cout<<kl<<"；'<<k2; 〃0>1表示a至少有2个因子if(n>2)cout<<","<<k3;//n>2表示至少有3个因子,故应再输出一个因子if(n>3)cout<<","<<k4;//n>3表示至少有4个因子,故应再输出一个因子if(n>4)cout<<","<<k5;/Z以下类似if(n>5)cout<<","<<k6;if(n>6)cout<<","<<k7;if(n>7)cout<<","<<k8;if(n>8)cout<<","«k9;if(n>9)cout<<","<<klO;cout<<endl<<endl;)}return0;usingnamespacestd;intmain(){intm,s,i;for(m=2;m<1000;m++){s=0;for(i=l;i<m;i++)if((m%i)==0)s=s+i;if(s==m){cout«m«"isa完数"<<endl;cout«"itsfactorsare:";for(i=l;i<m;i++)if(m%i==0)cout«i«"cout«endl;))return0;}题另ー解#include<iostream>usingnamespacestd;intmain(){intk[l1];for(a=2;a<=1000;a++){n=0;s=a;for(i=l;i<a;i++)if((a%i)==0){n++;s=s-i;k[n]=i; //将找到的因子赋给k[l]-k[10]}if(s==0){cout«a«"isa完数"<<endl;cout«"itsfactorsare:";for(i=l;i<n;i++)cout«k[i]«"";cout«k[n]«endl;}}return0;)题#include<iostream>usingnamespacestd;{inti,t,n=20;doublea=2,b=l,s=0;for(i=l;i<=n;i++){s=s+a/b;t=a;a=a+b; /Z将前ー项分子与分母之和作为下ー项的分子b=t; /Z将前ー项的分子作为下ー项的分母}cout«"sum="«s<<endl;return0;}题#include<iostream>usingnamespacestd;intmain(){intday,xl,x2;day=9;x2=l;while(day>0){xl=(x2+l)*2;/Z第1天的桃子数是第2天桃子数加1后的2倍x2=xl;day-;cout«"total="«xl«endl;return0;}题#include<iostream>#include<cmath>usingnamespacestd;intmain(){floata,xO,xl;cout«"enterapositivenumber:";cin»a; /Z输入a的值x0=a/2;xl=(x0+a/x0)/2;do{x0=xl;xl=(x0+a/x0)/2;}while(fabs(x0-x1)>=1e-5);cout«'Thesquarerootof"«a«"is"«xl«endl;return0;}usingnamespacestd;intmain()usingnamespacestd;intmain(){inti,k;for(i=0;i<=3;i++){for(k=0;k<=2*i;k++)cout«"*";cout«endl;)for(i=0;i<=2;i++){for(k=0;k<=4-2*i;k++)cout«"*";cout«endl;)return0;)〃输出上面4行・号/Z输出・号〃输出完一行・号后换行/Z输出下面3行・号/Z输出・号/Z输出完一行・号后换行3.25题#include<iostream>usingnamespacestd;intmain(){chari.j.k; /*i是。的对手;j是b的对手;k是c的对手・/for(i='X';i<='Z';i++)for(j='X';j<='Z';j++)for(k='X';k<='Z,;k++)if(i!=k&&j!=k)if(i!='X'&&k!='X'&&k!='Z')cout«"A-"«i<<" C-"«k«endl;return0;}4.!题#include<iostream>usingnamespacestd;infmain(){infhcf(intjnt);inflcd(intjnt,int);infu,v,h,l;cin»u»v;h=hcf(u,v);cout«"H.C.F="«h«endl;l=lcd(u,v,h);cout«"L.C.D="«l«endl;return0;){intt,r;if(v>u){t=u;u=v;v=t;}while((r=u%v)!=O){u=v;v=r;}return(v);}intlcd(intujntvjnth){return(u*v/h);)题#include<iostream>#include<math.h>usingnamespacestd;floatxl,x2,disc,p,q;intmain(){voidgreater_than_zero(float,float);voidequal_to_zero(float,float);voidsmaller_than_zero(float,float);floata,b,c;cout«"inputa,b,c:";cin»a»b»c;disc=b*b-4*a*c;cout«"root:"«endl;if(disc>0)(greater_than_zero(a,b);cout«"xl="«xl<<",x2="«x2«endl;)elseif(disc==O){equal_to_zero(a,b);cout«"xl="«xl«",x2="«x2<<endl;)else{smaller_than_zero(a,b);cout«"x1="«p«"+"«q«"i"«endl;cout«"x2="«p«"-"«q«"i"«endl;)return0;}voidgreater_than_zero(floota,floatb) /・定义一个函数,用来求disc>0时方程的根・/x2=(-b-sqrt(disc))/(2*a);voidequal_to_zero(floata,floatb)/・定义一个函数,用来求disc=0时方程的根7(xl=x2=(-b)/(2*a);}voidsmaller_than_zero(floata,floatb)/・定义ー个函数,用来求disc<0时方程的根・/{p=-b/(2*a);q=sqrt(-disc)/(2*a);}题#include<iostream>usingnamespacestd;intmain(){intprime(int); /・函数原型声明・/intn;cout«"inputaninteger:";cin»n;cout«n«"isaprime."«endl;elsecout«n«"isnotaprime."«endl;return0;}intprimefintn){intflag=l,i;for(i=2;i<n/2&&flag==l;i++)if(n%i==0)flag=0;return(flag);)题#include<iostream>usingnamespacestd;intmain(){intfac(int);inta,b,c,sum=0;cout«"entera,b,c:"；sum=sum+fac(a)+fac(b)+fac(c);cout«a«"!+"«b«"!+"«c«"!="«sum«endl;return0;}intfacfintn){intf=l;for(inti=l;i<=n;i++)f=f*i;returnf;)题#include<iostream>#include<cmath>usingnamespacestd;intmain(){doublee(double);doublex,sinh;cout«"enterx:";cin»x;sinh=(e(x)+e(-x))/2;cout«"sinh("«x«")="«sinh«endl;return0;doubleefdoublex){returnexp(x);}题#include<iostream>#include<cmath>usingnamespacestd;intmain(){doublesolutfdouble,double,double,double);doublea,b,c,d;cout«"inputa,b,c,d:";cin»a»b»c»d;cout«"x="«solut(a,b,c,d)«endl;return0;)doublesolutfdoublea,doubleb,doublecdoubled){doublex=l,xO,f,fl;do{x0=x;f=((a*x0+b)*x0+c)*x0+d;f1=(3*a*x0+2*b)*x0+c;x=xO-f/fl;}while(fabs(x-xO)>=1e-5);return(x);)题#include<iostream>#include<cmath>usingnamespacestd;intmain(){voidgodbaha(int);intn;cout«"inputn:";cin»n;godbaha(n);return0;)voidgodbaha(intn){intprime(int);inta,b;for(a=3;a<=n/2;a=a+2){if(prime(a)){b=n-a;if(prime(b))cout«n«"="«a«"+"«b«endl;}))intprime(intm){infi,k=sqrt(in);for(i=2;i<=k;i++)if(m%i==O)break;if(i>k)return1;elsereturn0;)题#include<iostream>usingnamespacestd;intmain(){intx,n;floatp(intjnt);cout«"inputn&x:";cin»n»x;cout«"n="«n«",x="«x«endl;;cout«"P"«n«"(x)="«p(n,x)«endl;return0;floatp(intnjntx){if(n==0)return(1);elseif(n==l)return(x);elsereturn(((2*n-l)*x*p((n-l),x)-(n-l)*p((n-2),x))/n);}题#include<iostream>usingnamespacestd;intmain(){voidhanoi(intn,charone,chartwo,charthree);intm;cout«"inputthenumberofdiskes:";cin»m;cout«"Thestepsofmoving"«m«"disks:"«endl;hanoifm/A'/BVC)；return0;voidhanoi(intn,charone,chartwo,charthree)〃将n个盘从one座借助two座,移到three座{voidmovefcharx,chary);if(n==l)movefone,three);else{hanoi(n-l,one,three,two);move(one,three);hanoi(n-l,two,one,three);})voidmovefcharx,chary){cout«x«"->"«y«endl;}题#include<iostream>usingnamespacestd;intmain(){voidconvert(intn);intnumber;cout«"inputaninteger:";cin»number;cout«"output:"«endl;{cout«"-";number-number;}convert(number);cout«endl;return0;)voidconvert(intn){inti;charc;if((i=n/10)!=0)convert(i);c=n%10+'0';cout«""«c;)题#include<iostream>usingnamespacestd;intmain(){intf(int);intn,s;cin»n;s=f(n);cout«"Theresultis"«s«endl;return0;)intf(intn)(；if(n==l)return1;elsereturn(n*n+f(n-l));)题#include<iostream>#include<cmath>usingnamespacestd;#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))intmain(){floata,b,c;cout«"inputa,b,c:"；cin»a»b»c;if(a+b>c&&a+c>b&&b+c>a)cout«"area="«AREA(a,b,c)«endl;elsecout«"ltisnotatriangle!"«endl;return0;}题#include<iostream>usingnamespacestd;//#defineLETTER1intmain(){charc;cin»c;#ifLETTERif(c>='a'&&c<='z')c=c-32;#elseif(c>='A'&&c<='Z')c=c+32;#endifcout«c«endl;return0;题#include<iostream>usingnamespacestd;#defineCHANGE1intmain(){charch[40];cout«"inputtext:"«endl;;gets(ch);#if(CHANGE){for(inti=0;i<40;i++){if(ch[i]!=1\01)if(ch[i]>='a'&&ch[i]<'z'||ch[i]>'A"&&ch[i]<7')ch[i]+=l;elseif(ch[i]=='z'||ch[i]=='Z')ch[i]-=25;)}#endifcout<<"output:"«endl«ch«endl;return0;题file#include<iostream>usingnamespacestd;infa;intmain(){externintpower(int);intb=3,c,d,m;cout«"enteranintegeraanditspowerm:"«endl;cin»a»m;c=a*b;cout«a«"*"«b«"="«c«endl;d=power(m);cout«a«"**"«m«"="«d«endl;return0;}题fileexterninta;intpowerfintn){inti,y=l;for(i=l;i<=n;i++)y*=a;returny;5.1题#include<iostream>#include<iomanip>usingnamespacestd;#include<math.h>intmain(){inti,j,n,a[101];for(i=l;i<=100;i++)a[i]=i;a[l]=0;for(i=2;i<sqrt(100);i++)for(j=i+l;j<=100;j++){if(a[i]!=0&&a[j]!=0)if(a[j]%a[i]==0)a口]=0；)couf«endl;for(i=l,n=0;i<=100;i++){if(a[i]!=0){cout«setw(5)«a[i]<<"n++;}if(n==10){cout«endl;cout«endl;return0;}题#include<iostream>usingnamespacestd;//#include<math.h>intmain(){intij,min,temp,a[l1];cout«"enterdata:"«endl;for(i=l;i<=10;i++){cout«"a["«i«"]=";cin»a[i]: 〃输入10个数}cout«endl«"Theoriginalnumbers:"«endl;;for(i=l;i<=10;i++)cout«a[i]«""; /Z输出这10个数cout«endl;;for(i=l；i<=9;i++) 〃以下8行是对10个数排序{min=i;for(j=i+l;j<=10;j++)if(a[min]>a[j])min=j;temp=a[i];〃以下3行将a[i+1]〜a[10]中最小者与a[i]对换temp=a[i];a[i]=a[min];a[min]=temp;)cout«endl«"Thesortednumbers:"«endl;for(i=l;i<=10;i++) /Z输出已排好序的10个数cout«a[i]«"";cout«endl;return0;)题#include<iostream>usingnamespacestd;intmain(){inta[3][3],sum=0;inti,j;cout«"enterdata:"«endl;;for(i=0;i<3;i++)for(j=0;j<3;j++)cin»a[i][j];for(i=0;i<3;i++)sum=sum+a[i][i];cout«"sum="<<sum«endl;return0;题#include<iostream>usingnamespacestd;intmain(){inta[l1]={1,4,6,9,13,16,19,28,40,100};intnum,i,j;cout«"arraya:"«endl;for(i=0;i<10;i++)cout«a[i]«"";cout«endl;;cout«"insertdata:";cin»num;if(num>a[9])a[10]=num;else{for(i=0;i<10;i++){if(a[i]>num){for(j=9;j>=i;j-)a[j+l]=a[j];a[i]=num;break;cout«"Now,arraya:"«endl;for(i=0;i<ll;i++)cout«a[i]«"";cout«endl;return0;}题#include<iostream>usingnamespacestd;intmain(){constintn=5;inta[n],i,temp;cout«"enterarraya:"«endl;for(i=0;i<n;i++)cin»a[i];cout«"arraya:"«endl;for(i=0;i<n;i++)cout«a[i]«"";for(i=0;i<n/2;i++) 〃循环的作用是将对称的元素的值互换{temp=a[i];a[i]=a[n-i-l];a[n-i-l]=temp;cout«endl«"Now,arraya:"«endl;for(i=0;i<n;i++)cout«a[i]«"";cout«endl;return0;)题#include<iostream>#include<iomanip>usingnamespacestd;intmain(){constintn=l1;intij,a[n][n];for(i=l;i<n;i++))for(i=3;i<n;i++)for(j=2;j<=i-l;j++)a[i][j]=a[i-l]D-l]+a[i-l][j];for(i=l;i<n;i++)

cout«endl;)cout«endl;return0;)题#include<iostream>usingnamespacestd;intmain(){constintn=4,m=5; 〃假设数组为4行5歹リinti,j,a[n][m],max,maxj;boolflag;for(i=0;i<n;i++) 〃输入数组for(j=O;j<m;j++)cin»a[i][j];for(i=0;i<n;i++){max=a[i][0];maxj=0;for(j=O;j<m;j++) 〃找出第i行中的最大数if(a[i][j]>max){max=a[i][j]: 〃将本行的最大数存放在max中maxj=j: 〃将最大数所在的列号存放在maxj中)flag=true;〃先假设是鞍点,以flag=true;〃先假设是鞍点,以flag为真代表for(infk=0;k<n;k++)if(max>a[k][maxj])〃将最大数和其同列元素相比{flag=false: 〃如果max不是同列最小,表示不是鞍点令flag1为假continue;}if(flag) 〃如果flag!为真表示是鞍点{cout«"a["«i«"]["«"["«maxj«"]="«max«endl;〃输出鞍点的值和所在行列号break;))if(!flag) 〃如果flag为假表示鞍点不存在cout«"ltdoesnotexist!"«endl;return0;)题#include<iostream>usingnamespacestd;intmain(){constintn=7;inti,numbentop,bottmid,loco,a[n];boolflag=true,sign;charc;cin»a[O];i=l；while(i<n){cin»a[i];if(a[i]>=a[i-l])i++;elsecout«"enterthisdataagain:";}cout«endl;for(i=0;i<n;i++)cout«a[i]«"";cout«endl;while(flag){cout«"inputnumbertolookfor:";cin»number;sign=false;top=0; 〃top是查找区间的起始位置セ〇卄=ル1; 〃bo卄是查找区间的最末位置if((number<a[0])||(number>a[n-l]))〃要查的数不在查找区间内loca=-l; //表示找不到while((!sign)&&(top<=bo卄)){mid=(bott+top)/2;if(number==a[mid]){loca=mid;cout«"Find"«number«",itspositionis"«loca+l«endl;sign=true;}elseif(number<a[mid])b0卄=mid-l;elsetop=mid+l;}if(!sign||loca==-l)cout«number«"hasnotfound."«endl;;cout«"continuornot(Y/N)?";cin»c;if(c=='N'IIc=='n')flag=false;)return0;}题#include<iostream>usingnamespacestd;intmain()intleapfintyear);intyear,month,day,days=0;cout«"inputdatefyear,month,day):";cin»year»month»day;cout«year«"/"«month«"/"«day;days=sum_day(month,day); /・调用函数一if(leapfyear)&&month>=3) /・调用函数ニdays=days+l;cout«"isthe"«days«"thdayinthisyear."«endl;return0;}intsum_day(intmonth,intday) 〃计算日期{inti;intday_tab[l2]={31,28,31,30,31,30,31,31,30,31,30,31);for(i=0;i<month-l;i++)day+=day_tab[i];return(day);)intleapfintyear)〃判断是否为闰年{intleap;leap=year%4==0&&year%l00!=01|year%400==0;return(leap);)题#include<iostream>usingnamespacestd;intmain(){inti,j,upper,lower,digit,space,other;chartext[3][80];upper=iower=digit=space=other=0;for(i=0;i<3;i++){cout«"pleaseinputline"«i+l«endl;gets(text[i]);for(j=0;j<80&&text、0’;j++){if(text[i][j]>='A'&&text[i][j]<='Z')upper++;elseif(text[i][j]>-a'&&text[i][j]<='z')lower++;elseif(text[i][j]>=,0,&&text[i][j]<='9')digit++;elseif(text[i][]]=='')space++;

elseother++；}}cout«"uppercase:"«upper«endl;cout«"low