实验一--数据类型和表达式(共23页)

1、实验一 数据类型和表达式选课时间：星期三下午 学号14084228 姓名 徐志鹏 【实验目的】1、熟悉并学习使用C+程序编译平台VC6.0；2、掌握如何在编译平台下编辑、编译、连接和运行一个简单的C+程序；3、掌握C+语言基础数据类型，熟悉变量及常量的定义和赋值方法；4、学会使用C+算术运算符和算术表达式；5、掌握C+程序的赋值和输入输出语句的使用方法；6、掌握简单C+程序的编写和调试【源程序】1： #include<iostream>using namespace std;int min(int a , int b)if(a<b)return a;return b;int

2、main()int a,b;cin>>a>>b;cout<<min(a,b);return 0;2：#include<iostream>using namespace std;int main()int a;double b;cin>>a>>b;if(a<b)cout<<a<<endl;else cout<<b<<endl;return 0;3：#include<iostream>using namespace std;int main()double a,

3、b;cin>>a;b=a*(9.00/5.00)+32;cout<<b;return 0;4：#include<iostream>#define fhcl 1.60934using namespace std;int main()double a,b;cin>>a;b=a/fhcl;cout<<b;return 0;5：#include<iostream>using namespace std;int main()int a,i,b; cin>>a;if(a>=1000) b=a%10000; a=a-b

4、+1111; else if(a>=100&&a<1000)a=111; else if(a>=10&&a<100)a=11; else if(a>=0&&a<10)a=1; cout<<a;return 0;【错误及解决办法】【实验总结】实验一比较简单，没有出现什么错误，代码实现和c差不多。 实验四 函数和作用域选课时间：星期三下午 学号14084228 姓名 徐志鹏 【实验目的】1、掌握函数的定义和说明方法；2、掌握函数调用时的传值调用、传址调用和引用调用方法；3、掌握函数重载的方法；4、学习使

5、用指向字符串的指针变量；5、掌握作用域的种类和范围；【源程序】 1：#include<iostream>#include<math.h>using namespace std;void conver(double *x , double *y) double a,b; a=(*x)*cos(*y); b=(*x)*sin(*y); cout<<a<<'n'<<b<<'n'void conver(double &x , double &y) double a,b; a=x*co

6、s(y); b=x*sin(y); cout<<a<<'n'<<b;int main()double x,y;cin>>x>>y;conver(&x,&y); /传值调用conver(x,y); /引用调用cout<<x<<'n'<<y;return 0;2：#include<iostream>using namespace std;typedef struct fu double zb ; double xb ;fushu;void pr

7、oduct(double &a,double &b) /浮点数相乘 double c; c=a*b; cout<<c<<'n'void product(fushu &a,fushu &b) /复数相乘 fushu c; c.zb=a.zb*b.zb-a.xb*b.xb; c.xb=a.zb*b.xb+a.xb*b.zb; cout<<c.zb<<"+"<<c.xb<<"i"<<'n'int main() fu

8、shu a,b ;double x,y;cout<<"两个浮点数"<<'n'cin>>x>>y;product(x,y);cout<<"两个复数"<<'n'cin>>a.zb>>a.xb;cin>>b.zb>>b.xb;product(a,b);return 0;3:#include<iostream>#include<math.h>#define pi 3.14using nam

9、espace std;int computeday(int year , int mot , int day) int num ; num = year*365 + mot*30 +day ; return num;double compute_physiological_index(int age) double cp ; cp = sin(2*pi)/28)*age); return cp ;double compute_emotional_index(int age) double cp ; cp = sin(2*pi)/23)*age); return cp ;double compu

10、te_mentality_index(int age) double cp ; cp = sin(2*pi)/33)*age); return cp ;int main() int y,m,d,n; double p,e,cm; cout<<"输入出生年月日" cin>>y>>m>>d; n=computeday(y,m,d); p=compute_physiological_index(n); cout<<"生理指数"<<p<<'n' e=compute

11、_emotional_index(n); cout<<"情绪指数"<<e<<'n' cm=compute_mentality_index(n); cout<<"智力指数"<<cm<<'n'【错误及解决办法】【实验总结】更加熟悉对函数的使用实验5 类与对象（一）【实验目的】1、掌握类的概念以及定义类的方法；2、学习简单面向对象程序的编写；【源程序】1：#include<iostream>using namespace std;class Fa

12、npublic : void set(double s , double r , bool o , string c) speed = s ; radius = r ; on = o ; color = c ; void display() cout<<"Speed Is : "<<speed<<'n' cout<<"Radius Is : "<<radius<<'n' cout<<"Color Is : "<&l

13、t;color<<'n' cout<<"On Is : "<<on<<'n' private:double speed , radius ;bool on ;string color ;int main() Fan fan1 , fan2 ; cout<<"The first fan's information : "<<'n' fan1.set(3,10,true,"yellow"); fan1.displ

14、ay(); cout<<"The secend fan's information : "<<'n' fan2.set(2,5,false,"blue"); fan2.display();return 0;2：#include<iostream>using namespace std;class Accountpublic : void set(int i , double b , double a) id = i ; balance = b ; annualInterestRate = a ;

15、 double getMonthlyInsterestRate(double a) return a/12 ; double withDraw(double m) balance -= m ; return balance ; double deposit(double m) balance += m ; return balance ; void display() cout<<"Id Is : "<<id<<'n' cout<<"Balance Is : "<<balance

16、<<'n' cout<<"GetMonthlyInsterestRate Is : "<<getMonthlyInsterestRate(annualInterestRate)*100<<"%"<<'n' private: int id ; double balance , annualInterestRate ;int main() Account user ; user.set(1122 , 20000 , 0.045); user.withDraw(2500

17、); user.deposit(3000); user.display();【错误及解决办法】一开始字符串用数组存发生一些莫名错误后面发现可以直接用string.【实验总结】定义类时，那些成员数据和成员函数是必须的，那些不是？public、protected、private分别表示什么意思？能否对类的成员数据在定义时初始化？在声明类时，没有必须的成员函数和成员数据。public代表公用成员，可在类外进行调用；private代表私有成员，只能被本类的成员函数访问，不能被类外访问；protect代表受保护的成员，可以被本类以及派生类的成员函数调用。不能对类的成员数据在定义时进行初始化。账户余额变量

18、balance是否必须定义为静态变量？为什么？不一定必须定义为静态变量，普通变量的加减也可以满足该题的要求。实验6 类与对象（二）【实验目的】1、掌握类的构造函数和析构函数的概念和使用方法；2、掌握对象数组、对象指针的定义和使用方法；3、掌握new和delete的使用方法；【源程序】#include<iostream>using namespace std;class CPointpublic : CPoint( double xx = 1 , double xy = 2) x = xx ; y = xy ; void SetX( double xx ) x = xx ; void

19、 SetY( double xy ) y = xy ; double GetX () return x ; double GetY () return y ; private: double x , y ; class CRectangle public : CRectangle( const CPoint & x , const CPoint & y ) l = x ; r = y ; void SetLPoint(const CPoint & x ) l = x ; void SetRPoint(const CPoint & y ) r = y ; doub

20、le GetPerimeter() double x , y ; x = 2 * ( r.GetX() - l.GetX() ) ; y = 2 * ( r.GetY() - l.GetY() ) ; return (x+y) ; double GetArea() double x , y ; x = r.GetX() - l.GetX() ; y = r.GetY() - l.GetY() ; return x*y ; private: CPoint l , r ; ;int main()CPoint x(2,5) ;CPoint y(6,8) ;double p , a ;CRectang

21、le * a_rectagnle = new CRectangle( x , y ) ; if( a_rectagnle != NULL ) p = a_rectagnle -> GetPerimeter() ; a = a_rectagnle -> GetArea(); cout<<"Perimeter is : "<<p<<'n' cout<<"Area is : "<<a<<'n' delete a_rectagnle ;实验七 继承

22、与派生【实验目的】1、理解继承在面向对象程序设计中的重要作用；2、理解继承和派生的概念；3、掌握通过继承派生出一个新类的方法；4、进一步学习简单面向对象程序的编写；【源程序】#include <iostream>using namespace std;typedef enumAssistantProfessor,AssociateProfessor,Professorrankind;class MYDatepublic: MYDate(int y=1990 , int m=1 , int d=1) year = y ; month = m ; day = d ; int diffy

23、ear(MYDate a) int y, m = 0; if(a.year > year) y = a.year - year - 1; m = a.month + 12 - month + y * 12; else y = year - a.year - 1; m = month + 12 - a.month + y * 12; return m; void print() cout<<"year:"<<year<<"month"<<month<<"day"<&

24、lt;day<<endl; int Gety() return year; int Getm() return month; int Getd() return day; private: int year , month , day ;class Personpublic: Person(string n , string i , string p) name = n ; id = i ; phonenumber = p ; void print() cout<<"name:"<<name<<endl; cout<&l

25、t;"id:"<<id<<endl; cout<<"phonenumber:"<<phonenumber<<endl; private: string name ; string id ; string phonenumber ;class Student: public Personpublic: void print() Person:print(); cout<<"Grade:"<<grade<<endl; Student(strin

26、g name,string id,string phonenumber,string grade): Person(name,id,phonenumber),grade(grade)private: const string grade;class Employee: public Personpublic: Employee(string name , string id , string phonenumber , string of , double sal , MYDate dat): Person(name , id , phonenumber) office = of ; sala

27、ry = sal ; dateHired = dat ; MYDate GetDate() return dateHired; void print() Person:print(); cout<<"office:"<<office<<endl; cout<<"salary:"<<salary<<endl; cout<<"y:"<<dateHired.Gety()<<endl; cout<<"m:"

28、;<<dateHired.Getm()<<endl; cout<<"d:"<<dateHired.Getd()<<endl; private: string office ; double salary ; MYDate dateHired ;class Faculty:public Employeepublic: Faculty(string name , string id , string phonenumber , string of , double sal , MYDate dat,int rank,

29、double Basic): Employee( name , id , phonenumber , of , sal , dat), rank(rankind(rank - 1), Basicsalary(Basic) int xinshui() return Basicsalary * (int)rank + 1); void print() Employee:print(); cout<<"rank:"<<rank<<endl; private: const rankind rank; double Basicsalary;clas

30、s Staff:public Employeepublic: Staff(string name , string id , string phonenumber , string of , double sal , MYDate dat,string po,double BasicWages, double Allowance): Employee( name , id , phonenumber , of , sal , dat), BasicWages(BasicWages),Allowance(Allowance) position = po ; int xins(MYDate d)

31、int res ; MYDate x = GetDate(); res = BasicWages + Allowance*d.diffyear(x); return res ; void print() Employee:print(); cout<<"position:"<<position<<endl; cout<<"BasicWages:"<<BasicWages<<endl; cout<<"Allowance:"<<Allowanc

32、e<<endl; private: string position ; const double BasicWages ; const double Allowance ;int main() MYDate date1(1950,1,1); MYDate date2(1996,1,1); MYDate date3(2000,1,1); Person p1("pName1","10001","7059261"); Student p2("pName2","10002","70

33、59262","freshman"); Employee p3("pName3","10003","7059263","officelala",1000,date1); Faculty p4("pName4","10004","7059264","officehaha",2000,date2,3,1000); Staff p5("pName5","10005",&qu

34、ot;7059265","officegaga",3000,date3,"zongcai",1000,200); p1.print(); p2.print(); p3.print(); p4.print(); p5.print(); MYDate now(2010,1,1); cout<<"money:"<<p4.xinshui()<<endl; cout<<"money:"<<p5.xins(now)<<endl; return 0

35、;【错误及解决办法】1：这次代码太长了，很容易出错，调bug调了半天.根据错误提示.【实验总结】  publicprotectedprivatepublic继承publicprotected不可用protected继承protectedprotected不可用private继承privateprivate不可用实验八 多态实现【实验目的】1、 了解继承和多态的作用和实现方式，掌握动态联编方法；2、 掌握使用C+语言的抽象类和派生类实现继承性；【源程序】 #include<iostream>using namespace std;class CStereoShapepublic:virtual do