面向对象程序设计题库(C++)(范本模板)

第第#页共25页〜D2()(cout〈〈"D2::~D2()" 〈〈endl;}}；intB::num=0;intmain(){B*buf[3];buf[0]=newD1;buf[1]=newD2;buf[2]=newD1;inti;cout〈〈B::getNum()<<endl;for(i=0;i〈3;i++)buf[i]—〉k();for(i=0;i<3;i++)deletebuf[i];cout<<B::getNum()〈〈endl;system("pause");return0;}程序运行的结果是 有如下程序#include<iostream>usingnamespacestd;classR{public:R(intr1,intr2):R1(r1),R2(r2){};voidprint();voidprint()const;private:intR1,R2;};voidR::print()(cout〈<R1<<",”<〈R2〈〈endl;};voidR::print()const{cout〈<R1<<”,"<〈R2〈〈endl;intmain(){Ra(5,4);constRb(20,52);b.print();system("pause");return1;}程序运行的结果是 有如下程序#include〈iostream>usingnamespacestd;classdemo(public:staticintconstructor,copy_constructor;demo(){cout〈〈"defaultconstructor"<<endl;constructor++;}demo(constdemo&x){cout〈〈"copyconstructor"<〈endl;copy_constructor++;}};intdemo::constructor";intdemo::copy_constructor=0;demousercode(demob){democ(b);returnc;}intmain(){demoa,d;cout〈〈"callingusercode"<〈endl;d=usercode(a);cout〈〈demo::constructor〈〈”,"<<demo::copy_constructor〈〈endl;system("pause");return0;}程序运行的结果是 13。 有如下程序#include〈iostream>usingnamespacestd;classA{staticintm;intn；public:A(intm，intn){m=this一〉m;

n=this一〉n;}Show(){cout〈<m〈〈n〈〈endl;}}intA::m;intmain(){Aal(3,4);Aa2(5,6);al。Show();a2.Show();}程序运行的结果是 有如下程序#include<iostream>usingnamespacestd;classP{char*name;intage;char*add;public:P()(cout〈〈"P"；}~P(){cout<<"!P";}}；classS:publicP{char*department;intlevel;public:S(){cout<<"S";}~S(){cout〈<"!S";}}；classT:publicP{char*major;floats;public:T(){cout<〈"T";}~T(){cout〈<"!T";}}；intmain(){Ss；Tt;system("pause");return0;}SFT请按任意，程序运行的结果是:15。为什么要定义虚析构函数？16。有如下程序#include<iostream〉usingnamespacestd;classB(public:B(){cout〈〈"B::B()"〈〈endl;num++;}virtualvoidf()=0;virtualvoidg()=0;voidk(){f()；cout〈〈"B::k()" 〈〈endl;g();}virtual-B()(cout<<"B::~B()"<<endl;num--;}staticintgetNum()(returnnum;}private:staticintnum;};classD1:publicB{public:D1(){cout〈〈"D1::D1()"<<endl;}voidf(){cout<<"D1::f()"〈<endl;}voidg()(cout〈<"D1::g()"<〈endl;~D1(){cout<<"D1::~D1()"<<endl;}}；classD2:publicB(public:D2(){cout〈〈"D2::D2()"〈<endl;}voidf(){cout〈〈"D2::f()"<〈endl;}voidg(){cout<<"D2::g()"<<endl;}~D2()(cout<〈"D2::~D2()"〈〈endl;}};intB::num=0;intmain(){B*buf[3];buf[0]=newD1;buf[1]=newD2;buf[2]=newD1;inti;cout<〈B::getNum()<〈endl;for(i=0;i<3;i++)buf[i]—>k();for(i=0;i<3;i++)deletebuf[i];cout<<B::getNum() 〈〈endl;system("pause");return0;}程序运行的结果是 17。有如下程序#include〈iostream>usingnamespacestd;

classR(public:R(intrl,intr2):Rl(rl),R2(r2)(};voidprint();voidprint()const;private:intR1,R2;｝；voidR::print()(cout〈(Rl<〈〈R2(<endl;}；voidR::print()const(cout〈(R1〈<","(<R2<(endl;}intmain()(Ra(5,4);constRb(20,52);boprint();system("pause");return1;程序运行的结果是:20,就请按任意键继续...18。有如下程序#include(iostream>usingnamespacestd;classB;classA(friendB;public:A()(cout〈<"inA()"〈〈endl;}A(constA&a){cout〈〈"inA(constA&a)〈<endl;~A()(cout(<"In~A()"<(endl;}}；classB:publicA(public:B()(cout〈("InB()"(<endl;}B(constAa)(cout<〈"InB(constAa)"<<endl;}}；voidf(A&a)(cout〈<"Inf(A&a)"〈(endl;}voidff(constB&b){cout<〈"Inff(B&b)"<<end;}voidff(Aa)()intmain()(Aa;Bbb=a;inAOinAnconstAinfi<>InB<constAa>InInIn19。有如下程序#include<iostream>usingnamespacestd;classdemo(

public:staticintconstructor,copy_constructor;demo()(cout〈<"defaultconstructor"<(endl;constructor++;}demo(constdemo&x)(cout<("copyconstructor"<(endl;copy_constructor++;}}；intdemo::constructor=0;intdemo::copy_constructor=0;demousercode(demob)(democ(b);returnc;}intmain()(demoa,d;cout〈<"callingusercode"<(endl;d=usercode(a);:copy_constructor<<endl;cout(<demo::constructor<〈“"(<demo::copy_constructor<<endl;return0;}程序运行的结果是:defaultconstruetot*defaultconstructorcallinguscrcodecopyconstructorcopyconstructop22清按任意键继续请分析下面的程序并给出该程序的执行结果。#include<iostream.h)classAA(inta;public:AA()(cout<〈"InitualizingAA!\n";)~AA()(cout<<"DestroyingAA!\n";)}；classBB(intb;AAp；public:BB()(cout〈("InitualizingBB!\n";}~BB()(cout<("DestroyingBB!\n";)}；voidmain()(BBX;cout<("Endingmain!\n";}执行该程序后，输出结果为:Initualizin$fAA!InitualizingBB!Endingmain?Destpoi/ingfBBTDestFoping1AA*21。写出下列程序的运行结果.#include(iostream>usingnamespacestd；classAA{inta;public:AA(inti){a=i;cout<<"AA="〈<a<<"\n";}virtual~AA(){cout〈<"~AA="〈<a<<"\n";}}；classBB:publicAA{intb;public:BB(inti,intj):AA(i){b=j;cout<<nBB=H<(b〈〈"\n";}~BB(){cout<<"~BB="〈<b<<"\n";}}；voidmain()(AA*pa=newAA(8);deletepa;AA*pb二newBB(6,9);deletepb;}执行该程序后，输出结果为:WTBB=9nrrac n写出下面程序的输出结果。#include<iostream.h>classTest{private:staticintval；inta;public:staticintfunc();staticvoidsfunc(Test&r);}；intTest::val=20;intTest::func(){val--;returnval;}voidTest::sfunc(Test&r)(r.a=25;cout〈〈" Result3=”<<r。a;}voidmain(){cout<〈"Resultl="<<Test::func()<<endl;Testa;cout<〈"Result2="〈<a.func();Test::sfunc(a);}执行该程序后，输出结果为：

Resultl=19Result2=1823。写出下面程序输出结果.#include<iostreamoh)classA(public:virtualvoidfunc()(cout(("funcinclassA"〈〈endl;}}；classB(public:virtualvoidfunc()(cout<("funcinclassB"<〈endl;)}；classC:publicA,publicB(public:voidfunc()(cout〈<"funcinclassC"((endl;}}；voidmain()(Cc;A&pa=c;B&pb=c;C&pc=c;pa.funcO；pb.funcO；pvofunc()； )执行该程序后，输出结果为：FuncincCFuncinclassCFuncinclassC24o写出下面程序的输出结果。#include<iostream。h〉classLocation(public:intX,Y;voidinit(intinitX,intinitY);intGetX();intGetY();}；voidLocation::init(intinitX,intinitY)(X=initX;Y=initY;}returnX; }returnY;(cout〈<returnX; }returnY;(cout〈<rL。}GetX()〈<""((rL}GetX()〈<""((rLoGetY()<<'\n'; }voiddisplay(Location^rL)voidmain(){LocationA[5] ,(2,2},{3,3},{4,4}};Location*rA=A;A[3].init(5,3);rA—>init(7,8);for(inti=0;i〈5;i++)display(*(rA++));}执行该程序后，输出结果为：四、程序设计题1。以下是一个整数栈类的定义：constunsignedinSIZE=100;classstack{public:stack();~stack();voidpush(int);voidpop();intpop()const;private:intstack[SIZE];inttos;}试编写一个栈的类模板(包括其成员函数定义)，以便为任何类型的对象提供栈结构数据的操作。编程从键盘输入x和y的值，计算y=ln(2x—y)的值，要求设计一个"负数求对数"的异常类，并写出测试程序。(对数函数log()在math。h中定义)写一个函数，找出给定字符串中具有最大ASCII码的字符。如字符串"world"中字符'w'具有最大的ASCII码。函数的原型为：charMaxCharacter(char*str);函数参数：指向所要处理的字符串； 函数返回值：如果不空，则返回具有最大ASCII码的字符，否则返回空字符0x0或’\0'。它的公有派生类其中包含载人数passenger_load。卡车类truck是vehicle的公有派生类其中包含载人数passenger_load和载重量payload,每个类都有相关数据的输出方法.要求用UML图来表示各个类及其相互的关系。根据下面类中Uion函数的原型和注释写出它的类外定义。classStrings(char*s; 〃指向动态分配的字符串数组空间intn: 〃记录字符串长度public:Strings(char-*str); 〃构造函数，利用str字符串长度初始化n,〃利用str字符串初始化s所指的字符串空间Strings(Strings&str); //拷贝构造函数Strings&Give(Strings&str); //实现str赋值给*this的功能