《面向对象程序设计》期末复习题及答案

面向对象程序设计—写出运行结果1.#include<iostream.h>constintT=6;voidmain(){inti,j,k=0;for(i=1;i<=T;i+=2){for(j=2;j<=T;j+=2)k++;}cout<<”k=”<<k<<endl;}运行结果：2.#include<iostream.h>voidmain(){intx=5;switch(2*x-3){case4:cout<<x<<’’;case7:cout<<2*x+1<<’’;case10:cout<<3*x-1<<’’;break;default:cout<<"default"<<endl;}cout<<"switchend."<<endl;}运行结果：3.#include<iomanip.h>constintM=20;voidmain(){intc2,c3,c5;c2=c3=c5=0;for(inti=1;i<=M;i++){if(i%2==0)c2++;if(i%3==0)c3++;if(i%5==0)c5++;}cout<<c2<<''<<c3<<''<<c5<<endl;}运行结果：4.#include<iostream.h>constintT=6;voidmain(){inti,j;for(i=1;i<=T;i+=2)for(j=2;j<=T;j+=2){if(i+j<T)cout<<’+’;elsecout<<’*’;}}运行结果：5.#include<iostream.h>classA{inta,b;public:A(){a=b=0;}A(intaa,intbb){a=aa;b=bb;}intSum(){returna+b;}int*Mult(){int*p=newint(a*b);returnp;}};voidmain(){Ax(2,3),*p;p=newA(4,5);cout<<x.Sum()<<’’<<*(x.Mult())<<endl;cout<<p->Sum()<<’’<<*(p->Mult())<<endl;}运行结果：6.#include<iostream.h>voidf2(int&x,int&y){intz=x;x=y;y=z;}voidf3(int*x,int*y){intz=*x;*x=*y;*y=z;}voidmain(){intx=10,y=26;cout<<"x,y="<<x<<","<<y<<endl;f2(x,y);cout<<"x,y="<<x<<","<<y<<endl;f3(&x,&y);cout<<"x,y="<<x<<","<<y<<endl;x++;y--;f2(y,x);cout<<"x,y="<<x<<","<<y<<endl;}7.#include<iostream.h>voidmain(){inta[10]={76,83,54,62,40,75,90,92,77,84};intb[4]={60,70,90,101};intc[4]={0};for(inti=0;i<10;i++){intj=0;while(a[i]>=b[j])j++;c[j]++;}for(i=0;i<4;i++)cout<<c[i]<<’’;cout<<endl;}8.#include<iostream.h>voidmain(){chars[3][5]={"1234","abcd","+-*/"};char*p[3];for(intI=0;I<3;I++)p[I]=s[I];for(I=2;I>=0;I--)cout<<p[I]<<'';cout<<endl;}9.#include<iostream.h>classCE{private: inta,b; intgetmax(){return(a>b?a:b);}public:intc; voidSetValue(intx1,intx2,intx3){a=x1;b=x2;c=x3; } intGetMax();};intCE::GetMax(){ intd=getmax();return(d>c?d:c);}voidmain(){ intx=5,y=12,z=8; CEex,*ep=&ex; ex.SetValue(x,y,z); cout<<ex.GetMax()<<endl; ep->SetValue(x+y,y-z,20);cout<<ep->GetMax()<<endl;}10.#include<iostream.h>classFranction{//定义分数类 intnume;//定义分子 intdeno;//定义分母public://把*this化简为最简分数，具体定义在另外文件中实现 voidFranSimp();//返回两个分数*this和x之和，具体定义在另外文件中实现 FranctionFranAdd(constFranction&x);//置分数的分子和分母分别0和1 voidInitFranction(){nume=0;deno=1;}//置分数的分子和分母分别n和d voidInitFranction(intn,intd){nume=n;deno=d;} //输出一个分数 voidFranOutput(){cout<<nume<<'/'<<deno<<endl;}}; voidmain(){ Franctiona,b,c,d; a.InitFranction(6,15); b.InitFranction(3,10); c.InitFranction(); c=a.FranAdd(b); d=c.FranAdd(a); cout<<"a:";a.FranOutput(); cout<<"b:";b.FranOutput(); cout<<"c:";c.FranOutput(); cout<<"d:";d.FranOutput();}11.#include<iostream.h>classA{inta,b;public:A(){a=b=0;}A(intaa,intbb){a=aa;b=bb;} intSum(){returna+b;} int*Mult(){ int*p=newint(a*b); returnp; }};voidmain(){int*k; Ax(2,3),*p;p=newA(4,5);cout<<x.Sum()<<''<<*(x.Mult())<<endl;cout<<p->Sum()<<''<<*(k=p->Mult())<<endl;deletek;}程序运行结果参考解答1.k=92.1114switchend.3