课程设计(小题)

...v.1函数重载定义重载函数max3用于计算三个数的最大值〔参数类型分别为int和double〕。#include<iostream>usingnamespacestd;intmax3(intx,inty,intz){return((x>y?x:y)>(x>z?x:z)?(x>y?x:y):(x>z?x:z));}doublemax3(doublex,doubley,doublez){return((x>y?x:y)>(x>z?x:z)?(x>y?x:y):(x>z?x:z));}voidmain(){inta,b,c; cout<<"Pleaseinputthreeinteger:"; cin>>a>>b>>c; cout<<"TheMaxofthreeis"<<max3(a,b,c)<<endl;doublea1,b1,c1; cout<<"Pleaseinputthreerealnumber:"; cin>>a1>>b1>>c1; cout<<"TheMaxofthreeis"<<max3(a1,b1,c1)<<endl;}2类的组合定义point类，数据成员包括x,y，成员函数包括构造函数，拷贝构造函数和析构函数，以及setx，getx，sety，gety四个属性函数。定义line类，端点由两个point类的对象组成，包括构造函数，析构函数以及计算线段长度的函数getlength。在main函数中，定义line的对象，并输出其长度。#include<iostream>#include<cmath>usingnamespacestd;classpoint{private:doublex,y;public: point(){} point(doublex,doubley):x(x),y(y) {}voidsetx(doublexx) { x=xx; }doublegetx(){returnx;}voidsety(doubleyy) { y=yy; }doublegety(){returny;} point(point&p) { x=p.x; y=p.y; } ~point(){}};classline{private:pointa,b;public: line(pointaa,pointbb):a(aa),b(bb) {}doublegetlength() {doublelength; length=sqrt(pow((a.getx()-b.getx()),2)+pow((a.gety()-b.gety()),2));returnlength; } ~line(){}};voidmain(){pointp1(2,3);pointp2(5,6);linel1(p1,p2); cout<<"Thelengthofthelineis"<<l1.getlength()<<endl;}3对象数组和函数定义student类，数据成员包括XXname和成绩score，成员函数包括构造函数，拷贝构造函数和析构函数。定义函数voidhighestscore(students[]),输出分数最高的学生XX和分数。在main函数中定义students[N]，调用highestscore函数,输出分数最高的学生XX和分数。#include<iostream>#include<iomanip>#include<string>constintN=2;usingnamespacestd;classstudent{private:stringname;doublescore;public: student(){} student(stringn,doubles):name(n),score(s) {} student(student&s) { name=; score=s.score; }/*voidsetname(stringnn) { name=nn; } stringgetname(){returnname;} voidsetscore(doubless) { score=ss; } doublegetscore(){returnscore;}*/voidhighestscore(students[]) {intk=0;doublemax; max=s[0].score;for(inti=1;i<N;i++) {if(max<s[i].score) { max=s[i].score; k=i; } } cout<<"Thenameis"<<s[k].name<<endl; cout<<"Highestscoreis"<<s[k].score<<endl; } ~student(){}friendostream&operator<<(ostream&os,students) { os<<<<""<<s.score<<endl;returnos; }friendistream&operator>>(istream&is,student&s) { is>>>>s.score;returnis; }};voidmain(){students[N];for(inti=0;i<N;i++) { cin>>s[i]; } s[N].highestscore(s);}4静态数据成员设计一个书类，能够保存书名、定价，所有书的本数和总价。〔将书名和定价设计为普通数据成员；将书的本数和总价设计为静态数据成员〕class

book{

private:

double

priece;

string

name;

static

int

num;

static

double

total;

};

int

book::num;

double

book::total;5动态内存分配定义point类，数据成员包括x,y，成员函数包括构造函数，拷贝构造函数和析构函数，以及setx，getx，sety，gety四个属性函数。在main函数中，用new和delete分配和释放N个point的数组。〔N是const常量，N=10〕#include<iostream>constintN=10;usingnamespacestd;classpoint{private:intx,y;public: point(){} point(intx,inty):x(x),y(y) {} point(point&p) { x=p.x; y=p.y; }voidsetx(intxx) { x=xx; }intgetx(){returnx;}voidsety(intyy) { y=yy; }intgety(){returny;} ~point(){}};voidmain(){point*p=newpoint[N];delete[]p;}6类的继承定义一个point类，包含私有数据成员x，y，成员函数包括无参构造函数，带参构造函数，set和get属性函数。定义circle类，从point类公有派生，增加数据成员半径r，成员函数包括无参构造函数，带参构造函数，计算面积函数getarea。在main函数中定义一个circle的对象，并计算其面积。#include<iostream>usingnamespacestd;classpoint{private:doublex,y;public: point(){} point(doublex,doubley):x(x),y(y) {}voidsetx(doublexx) { x=xx; }doublegetx(){returnx;}voidsety(doubleyy) { y=yy; }doublegety(){returny;} ~point(){}};classcircle:publicpoint{private:doubler;public: circle(){} circle(doublex,doubley,doubler):point(x,y),r(r) {}doublegetarea() {return3.14*r*r; }};voidmain(){circlec1(2,3,4.5); cout<<"Theareaofcircleis"<<c1.getarea()<<endl;}7虚基类定义vehicle类，数据成员包括私有的weight，公有的构造函数，析构函数和输出函数dispaly；从vehicle类公有派生car类，增加数据成员载人数personnum，公有的构造函数,析构函数和输出display；从vehicle类公有派生truck类，增加数据成员载货量laod,公有的构造函数，析构函数和输出函数display；从car类和truck类共同公有派生出pickup类，包括公有的构造函数和输出函数。在main函数中，定义pickup类对象，并输出其根本信息。#include<iostream>usingnamespacestd;classvehicle{private:doubleweight;public: vehicle(doublew):weight(w) {}voiddisplay() { cout<<"theweightofvehicleis"<<weight<<endl; } ~vehicle(){}};classcar:virtualpublicvehicle{private:intpersonnum;public: car(doubleww,intp):vehicle(ww),personnum(p) {}voiddisplay() {//vehicle::display(); cout<<"Thenumberofpersonis"<<personnum<<endl; } ~car(){}};classtruck:virtualpublicvehicle{private:doubleload;public: truck(doubleww,doublel):vehicle(ww),load(l) {}voiddisplay() {//vehicle::display(); cout<<"Theloadofthetruckis"<<load<<endl; } ~truck(){}};classpickup:publiccar,publictruck{public: pickup(doublew1,intp,doublew2,doublel,doublew):car(w1,p),truck(w2,l),vehicle(w) {}voiddisplay() {vehicle::display();car::display();truck::display(); } ~pickup(){}};voidmain(){pickupp1(211,2,200,170,100); p1.display();}8运算符重载，友元函数和this指针定义一个计数器类counter，具备自增，自减功能〔前后缀〕；输入输出>>,<<功能。在main函数里测试该类。#include<iostream>usingnamespacestd;classcounter{private:doublenum;public: counter(){} counter(doublen):num(n) {}counteroperator++() { ++num;return*this; }counteroperator--() { --num;return*this; }counteroperator++(int) {counternn; nn.num=this->num; num++;returnnn; }counteroperator--(int) {counternn; nn.num=this->num; num--;returnnn; }friendostream&operator<<(ostream&os,counterc);friendistream&operator>>(istream&is,counter&c);};ostream&operator<<(ostream&os,counterc){os<<c.num<<endl;returnos;}istream&operator>>(istream&is,counter&c){is>>c.num;returnis;}voidmain(){counterc1,c2; cin>>c1; c2=c1.operator++(0); cout<<"c1="<<c1; cout<<"c2="<<c2;}9虚函数和抽象类定义一个抽象类shape，包括公有的计算面积area函数，计算体积volume函数，输出根本信息函数printinfo〔三个函数均为纯虚函数〕。从shape公有派生point类，增加私有数据成员x,y坐标，以及构造函数，析构函数。从point公有派生circle类，增加私有数据成员半径r，以及构造函数，析构函数。从circle公有派生cylinder类，增加私有数据成员高度h，以及构造函数，析构函数。〔在定义三个派生类的过程中，自己考虑需要重定义哪个虚函数〕。在main函数中，定义shape类的指针，指向派生类的对象，输出三类对象的根本信息，面积，体积；〔将shape指针改为引用再尝试〕。#include<iostream>usingnamespacestd;classshape{public:virtualdoublearea()=0;virtualdoublevolume()=0;virtualvoidprintinfo()=0;};classpoint:publicshape{private:intx,y;public: point(intx,inty):x(x),y(y) {}voidprintinfo() { cout<<"x="<<x<<",y="<<y<<endl; } ~point(){}};classcircle:publicpoint{private:doubler;public: circle(intx,inty,doubler):point(x,y),r(r) {}doublearea() {return3.14*r*r; }voidprintinfo() {point::printinfo(); cout<<"r="<<r<<endl;//cout<<"circleareais"<<area()<<endl; } ~circle(){}};classcylinder:publiccircle{private:doubleh;public: cylinder(intx,inty,doubler,doubleh):circle(x,y,r),h(h) {}doublearea() {returncircle::area(); }doublevolume() {returncircle::area()*h; }voidprintinfo() {circle::printinfo(); cout<<"h="<<h<<endl;//cout<<"volumeis"<<volume()<<endl; } ~cylinder(){}};voidmain(){cylinderc1(2,3,4,5);shape*s; s=&c1; (*s).printinfo(); cout<<"circleareais"<<s->area()<<endl; cout<<"volumeis"<<(*s).volume()<<endl;}10模板设计一个堆栈的类模板Stack，在模板中用类型参数T表示栈中存放的数据，用非类型参数MAXSIZE代表栈的大小。#include<iostream>//constintMAXSIZE=5;usingnamespacestd;template<typenameT,intMAXSIZE>classstack{private:Ta[MAXSIZE];inttop;public: stack():top(0) {}voidpush(intx) {if(top==MAXSIZE) cout<<"thestackisfull"<<endl;else a[top]=x; top++; }Tpop() {if(top==0) cout<<"thestackisempty"<<endl;else top--;returna[top]; }};voidmain(){stack<int,5>s; s.push(1); cout<<s.pop()<<endl;;}11文件读写定义学生类数组，有N个人〔N=5〕，包括XX和语数外三名课的成绩，通过重载<<和>>运算符实现学生数组的文件读写。〔XX用stringname;〕#include<iostream>#include<fstream>#include<string>#include<iomanip>constintN=3;usingnamespacestd;classs