《面向对象程序设计》实验报告二.

1、计算机科学与工程学院面向对象程序设计实验报告二专业班级2017数字媒体技术01实验地点J411学生学号指导教师陈艳学生姓名黄浩博实验时间实验项目类的定义及应用（6学时）实验类别基础性（） 设计性（） 综合性（） 其它（ ）实验目的及要求1掌握类定义的语法；2掌握构造函数和析构函数的定义；3掌握几个关键字的用法：this、const、new/delete、friend4综合应用类的封装性解决常见问题；5完成实验内容，调试通过后将完整代码及运行截图粘贴到实验结果对应的题号下面；6对本次实验进行总结（遇到的问题，可行的解决方案，收获，体会等等）7完成实验报告后，以学号+姓名+实验2（.doc或.do

2、cx）为名上传到23/student/上传作业/陈艳/面向对象程序设计下对应班级及实验项目文件夹中成 绩 评 定 表类 别评 分 标 准分值得分合 计上机表现积极出勤、遵守纪律主动完成设计任务30分程序与报告程序代码规范、功能正确报告详实完整、体现收获70分说明： 评阅教师： 日 期： 年 月 日实 验 内 容题目1：下面设计一个三角形类，请按下列声明形式完成各成员函数的定义。添加主程序中初始化该类，并调用成员函数测试结果。#include using namespace std; class Trianglepublic: void Setabc(doub

3、lex, doubley, doublez);/设置三条边的值，注意要能成三角形double Perimeter( );/计算三角形的周长double Area( );/计算并返回三角形的面积 private: double a,b,c; /三条边的长度为私有数据成员;题目2：定义一个正方形类Square，编写构造函数、析构函数，Set（）/Get()函数以设置/读取边长，perimeter（）函数和area函数分别求周长和面积。并在主程序中进行测试。题目3：定义时间类Time，并计算两个时间之间的间隔。题目4：定义Student类（包含3个数据成员name，id_number，score），

4、计算班上30个学生的平均成绩，并按成绩高到低顺序输出高于平均成绩的学生信息。题目5：从定义复数类，实现实部、虚部的读写，复数计算，结果输出等功能。并在主程序中进行测试。题目6：定义Point类和Line类（Line类的成员是Point的对象复合），在主程序中进行测试，体会构造函数、析构函数、赋值运算符函数、拷贝构造函数的调用。实 验 结 果 题目1：#include#includeusing namespace std;class Trianglepublic:void Setabc(double x, double y, double z);double Perimeter();double

5、 Area();private:double a,b,c;int main() double a,b,c; coutabc; Triangle triangle; triangle.Setabc(a,b,c); double len=triangle.Perimeter(); double s=triangle.Area(); coutThe triangles Perimeter is :lenendl The triangles Area is :sendl; return 0;void Triangle:Setabc(double x, double y, double z) a=x;b

6、=y;c=z;double Triangle:Perimeter() double len; len=a+b+c; return len;double Triangle:Area() double p=(a+b+c)/2; double s=sqrt(p*(p-a)*(p-b)*(p-c); return s;题目2：#includeclass Squareprivate: double m_a;public: Square(); Square(); void Set(double a); void Get(); double Perimeter(); double Area();int ma

7、in() Square square; std:couta; square.Set(a); square.Get(); b=square.Perimeter(); c=square.Area(); std:coutThe squares Perimeter is :bstd:endl The squares Area is :cstd:endl; return 0;Square:Square() std:coutThis project is about square!std:endl;Square:Square() std:coutByestd:endl;void Square:Set(do

8、uble a) m_a=a;void Square:Get() std:coutThe squares length is:m_astd:endl;double Square:Perimeter() return 4*m_a;double Square:Area() return m_a*m_a;题目3：#includeclass Timeprivate: int m_hour,m_minute,m_second;public: Time()std:coutThis is a new time.std:endl; void Set(int s,int m,int h)m_hour=h;m_mi

9、nute=m;m_second=s; void Interval(Time s); Time()std:coutEnd.std:endl;int main() Time time2; std:coutPlease enter the time in chronological order.; for(int a=0;a2;a+) std:coutPlease enter the time:(second minute,hour)smh; timea.Set(s,m,h); time1.Interval(time0); return 0;void Time:Interval(Time S) in

10、t s,m,h; bool flag1(0),flag2(0); if(this-m_secondS.m_second) s=this-m_second-S.m_second; else s=60+this-m_second-S.m_second; flag1=1; if(flag1) this-m_minute-; if(this-m_minuteS.m_minute) m=this-m_minute-S.m_minute; else m=60+this-m_minute-S.m_minute; flag2=1; if(flag2) this-m_hour-; h=this-m_hour-S

11、.m_hour; std:coutThe time interval is:(hour,minute,second) h hours,m minutess seconds.;题目4：Student.h#ifndef STUDENT_H_INCLUDED#define STUDENT_H_INCLUDED#includeusing std:string;class Studentprivate: string m_name; long int m_id; float m_score;public: Student(string name=None,long int id=0,float scor

12、e=0):m_name(name),m_id(id),m_score(score); void Set(string name,long int id,float score)m_name=name;m_id=id;m_score=score; float Interval()return m_score; void pri()std:coutThe name is m_name.The id is m_id.The score is m_scorem_scorea.m_score) return true ;else return false;#endif / STUDENT_H_INCLU

13、DEDmain.cpp#include#includeStudent.hconst int n=30;int scan(Student ,int );void sear(Student );void prin(Student ,float );int main() Student studentn; int x=0; float sum(0); x=scan(student,x); for(int a=0;an;a+) sum+=studenta.Interval(); std:coutAverage achievement is sum/xstd:endl; sear(student); p

14、rin(student,sum/x); return 0;int scan(Student studentn,int x) char ch; std:coutEnter q to quit.ch;std:cin.get(); for(int a=0;an&ch!=q;a+) std:coutPlease enter a Student:(name,id,score)nameidscore; std:cin.get(); studenta.Set(name,id,score); x+; std:coutEnter q to quit.ch;std:cin.get(); return x;void

15、 sear(Student studentn) for(int a=0;an;a+) for(int b=1;bn;b+) if(studentb.bigger(studenta) Student c; c=studenta;studenta=studentb;studentb=c; void prin( Student studentn,float x) for(int a=0;ax) studenta.pri(); else continue; 题目5：Comp.h#ifndef COMP_H_INCLUDED#define COMP_H_INCLUDEDclass Comp privat

16、e: int real,imag;public: Comp(int r=0,int i=0):real(r),imag(i); Comp(); void cset(int ,int ); void cput(); Comp operator+(const Comp &com) const; Comp operator-(const Comp &com) const; Comp& operator=(const Comp &com);#endif / COMPLEX_H_INCLUDEDmain.cpp#include#includeComp.hvoid sca(Comp ,int );void

17、 pri(Comp ,int );int main() Comp a3; Comp b3; sca(a,3); std:coutThe a3 :; pri(a,3); b0=a0+a1; b1=a0-a2; b2=a0; std:coutThe b3 :; pri(b,3); return 0;void Comp:cset(int r,int i) real=r; imag=i;void Comp:cput() std:coutThe complexs real is realstd:endl; std:coutThe complexs image is imagreal+com.real;

18、sum.imag=this-imag+com.imag; return sum;Comp Comp:operator-(const Comp &com) const Comp sum; sum.real=this-real-com.real; sum.imag=this-imag-com.imag; return sum;Comp& Comp:operator=(const Comp &com) this-real=com.real; this-imag=com.imag; return *this;void sca(Comp a,int n) for(int x=0;xn;x+) int r

19、eal,imag; std:coutxreal; std:coutximag; ax.cset(real,imag); void pri(Comp a,int n) for(int x=0;xn;x+) ax.cput(); 题目6：Line.h#ifndef LINE_H_#define LINE_H_class Point private:int m_x, m_y;public:Point(int x = 0, int y = 0) :m_x(x), m_y(y) ;Point() ;void pset(int x, int y) m_x = x; m_y = y; ;void pput(

20、);Point operator+(const Point& point) const;Point operator-(const Point& point) const;Point& operator=(const Point& point);class Line private:Point m_start, m_end;public:Line(int x1=0, int y1=0, int x2=0, int y2=0) :m_start(x1, y1), m_end(x2, y2) ;Line() ;void lput();void lset(Point s, Point e) m_st

21、art = s, m_end = e; ;Line operator+(const Line& line) const;Line operator-(const Line& line) const;Line& operator=(const Line& line);#endif Line.cpp#include#includeLine.husing std:cout;using std:endl;Point Point:operator+(const Point& point) const Point p;p.m_x = this-m_x + point.m_x;p.m_y = this-m_

22、y + point.m_y;return p;Point Point:operator-(const Point& point) const Point p;p.m_x = this-m_x - point.m_x;p.m_y = this-m_y - point.m_y;return p;Point& Point:operator=(const Point& point) this-m_x = point.m_x;this-m_y = point.m_y;return *this;void Point:pput() cout m_x , m_y m_start + line.m_start;l.m_end = this-m_end + line.m_end;return l;Line Line:operator-(const Line& line) const Line l;l.m_start = this-m_start - line.m_start;l.m_end = this-m_end - line.m_end;return l;Line& Line:operator=(const Line& line) this-m_start =