面向对象程序设计练习题

mbermberember#include<iostream.h>classMyClass{public:MyClass(inti){member=i;}voidSetMember(intm){member=m;}intGetMember()const{returnmember;}voidprint()const{cout<<"member="<<member<<endl;}private:intmember;voidmain(){objobj1.print();MyClassobj2(3);berberobj1.print();obj2.print();}Astudent…Agraduatestudent…#include<iostream.h>classstudent{public:intcout<<"Astudent…"<<endl;}};public:voidprint(){cout<<"Agraduatestudent…"<<endl;}};voidmain(){students1,*ps;GStudents2;s1.print();ps=&s2;int//Saveasscore.hclassscore//成绩{public:score(float,float,float);score();voidprint();voidmodify(float,float,float);private:floatcomputer;floatenglish;floatmathematics;//Saveasscore.cpp#include"score.h"#include<iostream.h>score::score(floatc,floate,floatm){computer=c;english=e;mathematics=m;}score::score(){computer=0;english=0;mathematics=0;}voidscore::modify(floatc,floate,floatm){computer=c;english=e;mathematics=m;}voidscore::print(){cout<<"\nscorecomputer:"<<computer<<"\nscoreenglish:"<<english<<"\nscoremathematics:"<<mathematics<<endl;}//Saveasstudent.h#include"score.h"classstudent//学生{public:student(int,char*,float,float,float);~student();voidmodify(int,char*,float,float,float);voidprint();private:intnumber;char*name;scores;//对象成员//Saveasstudent.cpp#include"student.h"#include<string.h>#include<iostream.h>student::student(intn,char*na,floats1,floats2,floats3)ssss3);//(原因：)number=n;name=newchar[strlen(na)+1];strcpy(name,na);}student::~student(){deletename;}//(改正：)voidstudent::modify(intn,char*na,floats1,floats2,floats3){number=n;delete[]name;name=newchar[strlen(na)+1];strcpy(name,na);s.modify(s1,s2,s3);}voidstudent::print(){cout<<"\nnumber:"<<number<<"name:"<<name;s.print();}//Saveasmain.cpp#include"student.h"voidmain(){studentastudent(28,"Wu",78,64,69);astudent.print();astudent.modify(28,"Wu",87,72,99);}1.在下面横线处填上适当字句，完成类中成员函数的定义。classA{public:A(intaa=0){a=____}~A(){____}2.下面是一个函数模板，用于计算两个向量的和。在下面横线处填上适当字句，完成函数模板定义。#include<iostream.h>template<classT>T*f(T*a,T*b,intn){T*c=____for(inti=0;i<n;i++)c[i]=____returnc;}voidmain(){inta[5]={1,2,3,4,5},b[5]={10,20,30,40},*p;p=f(a,b,5);for(inti=0;i<5;i++)cout<<p[i]<<endl;}3.下面是一个用户口令检查程序，在横线处填上适当语句完成程序功能。#include<iostream.h>#include<string.h>______voidmain(){charuser[10];______if((strcmp(user,pass))==0)cout<<″yourpasswordiscorrect″<<endl;cout<<″yourpasswordiserror″<<endl;}4.在下列程序的下划线上填上合适的内容，使程序功能完整。//Saveascircle.h#ifndefCIRCLE_H#defineCIRCLE_H#include<iostream.h>#definePI3.1415926classCircle//圆{protected:floatx,y;floatradius;public:Circle(){x=y=0;radius=0;}Circle(floatx1,floaty1,floatr){x=x1;y=y1;radius=r;}doublegetArea(){returnradius*radius*PI;}voidshow(){cout<<"x="<<x<<";y="<<y<<endl;cout<<"radius="<<radius<<endl<<endl;}#endif//Saveascylinder.h#ifndefCYLINDER_H#defineCYLINDER_H#include<iostream.h>#include"Circle.h"classCylinder:publicCircle//圆柱{private:floatheight;public:Cylinder(){height=0;}Cylinder(floatx1,floaty1,floatr,floath):{height=h;}doublegetArea(){return2*radius*radius*PI+2*radius*height*PI;}voidshow(){cout<<"x="<<x<<";y="<<y<<endl;cout<<"radius="<<radius<<endl<<"height="<<height<<endl<<endl;}#endif//Saveasmain.cpp#include"Circle.h"#include"Cylinder.h"voidmain(){Circlea(1,2,3);Cylinderb(4,5,6,7);}#include<iostream.h>classSample{public:Sample(inti){n=i;}friendintadd(Sample&s1,Sample&s2);};intadd(Sample&s1,Sample&s2){returns1.n+s2.n;}voidmain(){Samples1(-10),s2(20);cout<<add(s1,s2)<<endl;}#include<iostream.h>intadd(intx,inty){returnx+y+1;}doubleadd(doublex,doubley){returnx+y-1;}voidmain(){inta=2,b=5;doublec=3.5,d=9.3;cout<<"a+b="<<add(a,b)<<endl;cout<<"c+d="<<add(c,d)<<endl;} #include<iostream.h>classA{public:nclassB:virtualpublicA{};classC:virtualpublicA{};classD:publicB,publicC{intgetn(){returnB::n;}};voidmain(){Dd;d.B::n=10;d.C::n=20;cout<<"d.B::n="<<d.B::n<<endl;cout<<"d.C::n="<<d.C::n<<endl;} s;}voidprint(){voidmainm3.print();} //Saveasanimal.h#ifndefA#defineA#include<iostream.h>#include<string.h>classanimal{protected:charname[10];public:virtualvoidshow()=0;#endif//Saveascat.h#include"animal.h"classcat:publicanimal{public:voidshow(){strcpy(name,"cat");cout<<"Name:"<<name<<endl;}//Saveasdog.h#include"animal.h"classdog:publicanimal{sort(a,size);public:voidshow(){strcpy(name,"dog");cout<<"Name:"<<name<<endl;}//Saveasmain.cpp#include"dog.h"#include"cat.h"voidmain(){dogd;catc;} //Saveasmain.cpp#include<iostream.h>constintsize=5;template<classT>voidsort(TArray[],constintn){for(inti=0;i<n-1;i++)for(intj=i+1;j<n;j++)if(Array[i]>Array[j]){Tt=Array[i];Array[i]=Array[j];Array[j]=t;}}template<classT>voidshow(TArray[],constintn){for(inti=0;i<n;i++)cout<<Array[i]<<"";cout<<endl;}voidmain(){inta[size]={23,42,36,19,16};floatb[size]={23.5,42.5,36.5,19.5,16.5};show(a,size);sort(b,size);show(b,size);} //Saveascomplex.hclassComplex{private:floatreal;floatimag;public:Complex(){real=0.0;imag=0.0;}Complex(floatr,floati){real=r;imag=i;}voidprint();Complexoperator+(Complexa);Complexoperator*(Complexa);Complexoperator/(Complexa);//Saveascomplex.cpp#include<iostream.h>#include"complex.h"voidComplex::print(){cout<<real;if(imag>0)cout<<"+";if(imag!=0)cout<<imag<<"i"<<endl;cout<<endl;}ComplexComplex::operator+(Complexa){Complex