1. 采用面向对象的方式编写一个通迅录管理程序,通迅录中的信息包括:姓名,公司,联系电话,邮编。要求的操作有:添加一个联系人,列表显示所有联系人。先给出类定义,然后给出类实现。(提示:可以设计二个类,一个通迅录条目类CommEntry,一个通讯录类Commus)
class CommEntry
{
public:
CommEntry();
~CommEntry();
virtual void input();
virtual void output();
void setName(string nm);
void setTel(string t);
string getName();
string getTel();
void setTelCount(int c);
private:
string name;
int telCount;
string tel;
string telType;
};
class FreindEntry: public CommEntry
{
public:
void input();
void output();
void setEmail(string nm);
string getEmail();
private:
string Email;
};
class Comms
{
public:
Comms(int max=100);
~Comms();
void inputAll();
void outputAll();
void find(string nm);
void modify_tel(string nm);
private:
CommEntry **pCe;
int maxCount;
int count;
};
Comms::Comms(int maxCount)
{
pCe = new CommEntry * [maxCount];
}
Comms::~Comms()
{
int i;
for(i=0; i<=count; i++)
{
delete pCe[i];
}
delete []pCe;
}
if (iC==1)
{
pCe[i]= new CommEntry;
}
else if(iC==2)
{
pCe[i]= new FreindEntry;
}
pCe[i]->input();
/*Employee 和Manager,Manager 是一种特殊的Employee。
Employee 对象所具有的基本信息为:姓名、年令、工作年限、部门号,
对象除具有上述基本信息外,还有级别(level)信息。公司中的两类职
输出Employee/Manager 对象的个人信息
retire() // 判断是否到了退休年令,是,屏幕给出退休提示。公司规定:
类对象的退休年令为55 岁,Manager 类对象的退休年令为60 岁
定义并实现类Employee 和Manager;
(注意:Manager继承自Employee)
定义一个测试程序,测试所定义的类Employee 和Manager*/
#include<iostream>
#include<string>
using namespace std;
class Employee
{
public:
Employee();
Employee(string the_name,int the_age,int the_wokeage,string the_depNo);
void printOn();
void retire();
protected:
string name;
int age;
int wokeage;
int number;
string depNo;//部门号
};
class Manager:public Employee
{
public:
Manager();
Manager(string the_name,int the_age,int the_wokeage,string the_depNo,int the_level);
void printOn();
void retire();
void addMember(Employee*);
private:
int level;
Employee numOfEmployee[100];
};
Employee::Employee():name("no name yet!"),age(0),wokeage(0),depNo("no name yet!")
{
}//初始化列表
Employee::Employee(string the_name,int the_age,int the_wokeage,string the_depNo)
{
name=the_name;
age=the_age;
wokeage=the_wokeage;
depNo=the_depNo;
}
void Employee::printOn()
{
cout<<"name is "<<name<<endl
<<"age is "<<age<<endl
<<"wokeage is "<<wokeage<<endl
<<"bumen number is "<<number<<endl;
}
void Employee::retire()
{
if(age>=55)
cout<<"retire!\n";
else
cout<<"not retire!\n";
}
Manager::Manager():level(0)
{
}
Manager::Manager(string the_name,int the_age,int the_wokeage,string the_depNo,int the_level)
:Employee(the_name,the_age,the_wokeage,the_depNo),level(the_level)
{
}//初始化列表
void Manager::printOn()
{
cout<<"name is "<<name<<endl
<<"age is "<<age<<endl
<<"wokeage is "<<wokeage<<endl
<<"bumen number is "<<number<<endl
<<"level is "<<level<<endl;
}
void Manager::retire()
{
if(age>=60)
cout<<"retire!\n";
else
cout<<"not retire!\n";
}
void Manager::addMember(Employee* e)
{
numOfEmployee[0]=*e;
}
int main()
{
Employee e("Jack", 24, 2, "Development");
Manager m("Tom", 30, 5, "Development", 2);
m.addMember(&e);//m管理e
e.printOn();
m.printOn();
Employee* p = &e;//基类指针指向基类对象
p->retire(); // 如果雇员的年龄是55,则b为true
p = &m;//基类指针指向派生类对象
p->retire (); // 如果管理者的年龄是60,则 b为true
return 0;
}
3. 已知类的定义如下:
class Base { protected: int iBody; public: virtual void printOn() = 0; Base(int i = 0) : iBody(i) {} virtual int display(int x=60) {iBody = x;return iBody;} }; class Sub1 : public Base { // … Sub1(int i, string s); class Sub2 : public Base { Sub2(int i, short s); |
试完成类Sub1和Sub2的定义和操作的实现代码,使之能符合下面程序及在注释中描述的运行结果的要求:
main(){ Sub1 s1(1000, "This is an object of Sub1"); Sub2 s2(1000, 20); s1.printOn(); // 此时显示出: 1000: This is an object of Sub1 s2.printOn(); // 此时显示出: 20 and 1000 cout<<s2.display(20); // 此时显示出: 20 } |
#include<iostream>
#include<string.h>
#include<stdio.h>
using namespace std;
class Base
{
protected:
int iBody;
public:
virtual void printOn() = 0;
Base(int i = 0) : iBody(i) {}//构造函数,初始化列表
virtual int display(int x=60)
{
iBody = x;
return iBody;
}
};
class Sub1 : public Base
{
string cpString;
public:
Sub1(int i, string s) : Base(i),cpString(s)
{
}
void printOn()
{
cout<<iBody<<":"<<cpString<<endl;
}
};
class Sub2 : public Base
{
short sShort;
public:
Sub2(int i, short s) : Base(i),sShort(s) {}
void printOn()
{
cout<<sShort<<" and "<<iBody<<endl;
}
int display(int x=20)
{
sShort = x;
return sShort;
}
};
int main()
{
Sub1 s1(1000, "This is an object of Sub1");
Sub2 s2(1000, 20);
s1.printOn(); // 此时显示出: 1000: This is an object of Sub1
s2.printOn(); // 此时显示出: 20 and 1000
cout<<s2.display(20); // 此时显示出: 20
return 0;
}
4. 在一个GUI程序中,有一系列相关的类,如circle,triangle,square等等,其中square由二个triangle对象构成. circle,triangle,square等类的对象都有相似的行为print(string)(打印出该类对象的相应信息,如类circler的此函数输出”Circle”),draw()(画出相应的类对象的图形),我们应如何组织这些类,使得系统易于扩充和维护?请用UML语言画出类图,并给出相应类中方法的界面(头文件).

补充一道期末考试题。
5.
#include <iostream>
using namespace std;
void hello( ) { cout << " Hello, world!\n"; }
int main( ) {
hello( ); return 0;
}
试修改上面的程序,使其输出变成:
Begin
Hello, world!
End
限制:(1)不能对main()进行任何修改;(2)不能修改hello()函数。
解题思路:利用类的构造函数和析构函数来实现!!!
#include <iostream>
using namespace std;
class A {
public:
A ( ) { cout << "Begin\n"; }
~A ( ) { cout << "End\n"; }
};
void hello( ) {cout << " Hello, world!\n"; }
A a; // a是一个全局对象
int main( ) {
hello( );
return 0;
}
作者:王陸