實(shí)
驗(yàn)
報(bào)
告
課程名稱
程序設(shè)計(jì)語(yǔ)言 C/C++
實(shí)驗(yàn)項(xiàng)目
運(yùn)算符重載
一、 實(shí)驗(yàn)?zāi)康?/p>
1、 理解重載運(yùn)算符的意義；
2、 掌握成員函數(shù)、友元函數(shù)重載運(yùn)算符的定義及使用方法；
3、 掌握動(dòng)態(tài)聯(lián)編、虛函數(shù)、純虛函數(shù)和抽象類的概念； 4、 掌握虛函數(shù)、純虛函數(shù)和抽象類的定義及使用方法。
二、 實(shí)驗(yàn)內(nèi)容
1.上機(jī)分析下面程序，掌握運(yùn)算符重載的方法。
要求：
（1）給出實(shí)驗(yàn)結(jié)果； （2）掌握重載“+、-、—、=”運(yùn)算符重載的方法。
#include <iostream> using namespace std;
class COMPLEX
{
public:
COMPLEX(double r = 0, double i = 0);
//構(gòu)造函數(shù)
COMPLEX(const COMPLEX& other);
//拷貝構(gòu)造函數(shù)
void print();
//打印復(fù)數(shù)
COMPLEX operator +(const COMPLEX& other);
//重載加法運(yùn)算符（二元）
COMPLEX operator -(const COMPLEX& other);
//重載減法運(yùn)算符（二元）
COMPLEX operator -();
//重載求負(fù)運(yùn)算符（一元）
COMPLEX operator =(const COMPLEX& other);
//重載賦值運(yùn)算符（二元）
protected:
double real, image;
// 復(fù)數(shù)的實(shí)部與虛部
};
COMPLEX::COMPLEX(double r,double i) {
real=r;
image=i; }
COMPLEX::COMPLEX(const COMPLEX& other)
{
real=other.real;
image=other.image; }
void COMPLEX::print() {
cout<<real;
if(image>0)
cout<<"+"<<image<<"i";
else if(image<0)
cout<<image<<"i";
cout<<endl; }
COMPLEX
COMPLEX::operator +(const COMPLEX& other) {
COMPLEX temp;
temp.real=real+other.real;
//real=real+other.real;
temp.image=image+other.image;
//image=image+other.image;
return temp;
//*this; }
COMPLEX COMPLEX::operator -(const COMPLEX& other) {
COMPLEX temp;
temp.real=real-other.real;
temp.image=image-other.image;
return temp;
}
COMPLEX COMPLEX::operator -() {
COMPLEX temp;
temp.real=-real;
temp.image=-image;
return temp; }
COMPLEX COMPLEX::operator =(const COMPLEX& other) {
real=other.real;
image=other.image;
return *this;
//返回對(duì)象值 }
int main()
{
COMPLEX c1(1, 2);
// 定義一個(gè)值為 1 + 2i 的復(fù)數(shù) c1
COMPLEX c2(2);
// 定義一個(gè)值為 2 的復(fù)數(shù) c2
COMPLEX c3(c1);
// 用 COMPLEX(const COMPLEX& other)創(chuàng)建一個(gè)值同 c1 的新復(fù)數(shù)
c3.print();
// 打印 c3 原來(lái)的值
c1=c1+c2+c3;
// 將 c1 加上 c2 再加上 c3 賦值給 c1
c2=-c3;
// c2 等于 c3 求負(fù)
c3=c2-c1;
// c3 等于 c2 減去 c1
c3.print();
// 再打印運(yùn)算后 c3 的值
cout<<sizeof(c1)<<endl;
return 0;
} 2. 上機(jī)分析下面程序，給出輸出結(jié)果。
要求：
（1）給出實(shí)驗(yàn)結(jié)果；
（2）掌握友元運(yùn)算符重載的基本方法：通過(guò)重載 cout 語(yǔ)句，可使用 cout 輸 出對(duì)象的數(shù)據(jù)成員值的方法。
#include<iostream.h> class T {
int x,y;
public:
T(int a,int b)
{x=a;y=b;}
friend ostream & operator<<(ostream &os, T &a); };
ostream & operator<<(ostream &os,T &a) { os<<"x="<<a.x<<"
y="<<a.y;
return os; }
void main() {
T a(1,2);
cout<<a<<endl; }
3、上機(jī)分析下面程序，掌握抽象類、純虛函數(shù)以及動(dòng)態(tài)綁定的定義和使用。
要求：
（1）給出實(shí)驗(yàn)結(jié)果；
（2）掌握抽象類、純虛函數(shù)以及動(dòng)態(tài)綁定的方法。
// shape.h 文件 定義抽象基類 Shape
#ifndef SHAPE_H #define SHAPE_H class Shape {
public:
virtual double Area() const
{
return 0.0;
}
// 純虛函數(shù)，在派生類中重載
virtual void PrintShapeName() const = 0;
virtual void Print() const = 0; }; #endif
// point.h 文件 定義類 Point #ifndef POINT_H #define POINT_H #include <iostream> using namespace std; class Point : public Shape {
int x, y;
//點(diǎn)的 x 和 y 坐標(biāo)
public:
Point( int = 0, int = 0 );
// 構(gòu)造函數(shù)
void SetPoint( int a, int b );
// 設(shè)置坐標(biāo)
int GetX() const // 取 x 坐標(biāo)
{
return x;
}
int GetY() const // 取 y 坐標(biāo)
{
return y;
}
virtual void PrintShapeName() const
{
cout << "Point: ";
}
virtual void Print() const; //輸出點(diǎn)的坐標(biāo) }; #endif
// Point.cpp 文件
Point 類的成員函數(shù)定義
#include <iostream> using namespace std;
Point::Point( int a, int b ) : x( a ), y( b )
{ } void Point::SetPoint( int a, int b )
{
x = a;
y = b; }
void Point::Print() const
{
cout << "[" << x << ", " << y << "]"; }
// circle.h 定義類 Circle
#ifndef CIRCLE_H
#define CIRCLE_H
#include <iostream> using namespace std;
class Circle : public Point
{
double radius;
public:
Circle(int x = 0, int y = 0, double r = 0.0);
void SetRadius( double r );
//設(shè)置半徑
double GetRadius() const;
//取半徑
virtual double Area() const;
//計(jì)算面積 a
virtual void Print() const;
//輸出圓心坐標(biāo)和半徑
virtual void PrintShapeName() const
{
cout << "Circle: ";
}
};
#endif
// circle.cpp 文件
circle 類的成員函數(shù)定義
Circle::Circle(int a,int b,double r): Point(a,b), radius( r )
{ }
void Circle::SetRadius( double r )
{
radius = ( r >= 0 ? r : 0 );
}
double Circle::GetRadius() const
{
return radius;
}
double Circle::Area() const
{
return 3.14159 * radius * radius; }
void Circle::Print() const
{
cout << "Center = ";
Point::Print();
cout << "; Radius = " << radius << endl;
}
//main.cpp 文件 演示圖形類
#include <iostream>
using namespace std;
void virtualViaPointer( const Shape * );
void virtualViaReference( const Shape & );
int main()
{
Point point(30,50);
//創(chuàng)建 point、circle 對(duì)象
Circle circle(120,80,10.0);
point.PrintShapeName();
//輸出 point、circle、rectangle 對(duì)象信息
point.Print();
cout << endl;
circle.PrintShapeName();
circle.Print();
Shape *arrayOfShapes[2];
//定義基類對(duì)象指針
arrayOfShapes[ 0 ] = &point;
arrayOfShapes[ 1 ] = &circle;
cout << "Virtual function calls made off " << "base-class pointers\n";
//通過(guò)基類對(duì)象指針訪問(wèn)派生類對(duì)象
for ( int i = 0; i < 2; i++ )
{
virtualViaPointer( arrayOfShapes[ i ] );
}
cout << "Virtual function calls made off " << "base-class references\n";
for ( int j = 0; j < 2; j++ )
{
virtualViaReference( *arrayOfShapes[ j ] );
}
return 0; } void virtualViaPointer( const Shape *baseClassPtr )
//通過(guò)基類對(duì)象指針訪問(wèn)虛函數(shù)實(shí)現(xiàn)動(dòng)態(tài)綁定
{
baseClassPtr->PrintShapeName();
baseClassPtr->Print();
cout << "Area = " << baseClassPtr->Area() << endl;
} //通過(guò)基類對(duì)象引用訪問(wèn)虛函數(shù)實(shí)現(xiàn)動(dòng)態(tài)綁定
void virtualViaReference( const Shape &baseClassRef ) {
baseClassRef.PrintShapeName();
baseClassRef.Print();
cout << "Area = " << baseClassRef.Area() << endl; } 4、上機(jī)完成下面實(shí)驗(yàn)。
聲明一個(gè) Shape（形狀）基類，它有兩個(gè)派生類：Circle（圓）和 Square（正方形），要求利用多態(tài)性的概念，分別以虛函數(shù)的形式完成對(duì)圓和正方形的周長(zhǎng)及面積的計(jì)算。
要求：Shape 類的數(shù)據(jù)成員包括中心點(diǎn)的坐標(biāo)，Circle 類和 Square 類初始值分別給出：
圓的圓心和半徑；正方形的中心和一個(gè)頂點(diǎn)。
【實(shí)例編程】（參考）
實(shí)數(shù)矩陣類 //頭文件 MatrixException.h
#include <stdexcept>
#include <string>
using namespace std;
class MatrixException : public logic_error
{
public:
MatrixException(const string& s) : logic_error(s)
{}
};
class Singular: public MatrixException
{
public:
Singular(const string& s) : MatrixException("Singular: "+s)
{}
}; class InvalidIndex: public MatrixException
{
public:
InvalidIndex(const string& s) : MatrixException("Invalid index: "+s)
{}
};
class IncompatibleDimension: public MatrixException
{
public:
IncompatibleDimension(const string& s) : MatrixException("Incompatible Dimensions: "+s)
{} };
//頭文件 Matrix.h //#include "MatrixException.h"
class Matrix
{
private:
double* elems;
// 存放矩陣中各元素，按行存放
int row, col;
// 矩陣的行與列
protected:
double rowTimesCol(int i, const Matrix &b, int j ) const;
//矩陣的第 i 行矩陣 b 的第 j 列相乘
public:
Matrix(int r, int c);
Matrix(double* m, int r, int c);
Matrix( const Matrix &m );
~Matrix();
//重載運(yùn)算符" ="，實(shí)現(xiàn)矩陣賦值，若進(jìn)行運(yùn)算的矩陣維數(shù)不同，拋出 IncompatibleDimension 異常
Matrix& operator =(const Matrix& b) throw(IncompatibleDimension);
//重載運(yùn)算符"( )"，用來(lái)返回某一個(gè)矩陣元素值,若所取矩陣下標(biāo)非法，拋出 InvalidIndex 異常
double& operator () (int i, int j) throw(InvalidIndex);
const double& operator () (int i, int j) const throw(InvalidIndex);
//給矩陣元素賦值，若所設(shè)置矩陣元素下標(biāo)非法，拋出 InvalidIndex 異常
void SetElem(int i, int j, double val) throw(InvalidIndex);
//重載運(yùn)算符"*"，實(shí)現(xiàn)矩陣相乘, 若前一個(gè)矩陣的列數(shù)不等于后一個(gè)矩陣的行數(shù)，拋出 IncompatibleDimension 異常
Matrix operator *(const Matrix& b) const throw(IncompatibleDimension);
//重載運(yùn)算符" +"，實(shí)現(xiàn)矩陣相加,若進(jìn)行運(yùn)算的矩陣維數(shù)不同，拋出 IncompatibleDimension 異常
Matrix operator +(const Matrix& b) const throw(IncompatibleDimension);
//重載運(yùn)算符" -"，實(shí)現(xiàn)矩陣相減//若進(jìn)行運(yùn)算的矩陣維數(shù)不同，拋出 IncompatibleDimension 異常
Matrix operator -(const Matrix& b) const throw(IncompatibleDimension);
void Print() const;
//按行顯示輸出矩陣中各元素
};
//成員函數(shù)的定義文件 Matrix.cpp
#include <iostream>
#include <strstream>
#include <string>
//#include "Matrix.h"
using namespace std;
string int2String(int i)
//將整型數(shù)轉(zhuǎn)換為 String 類型
{
char buf[64];
ostrstream mystr(buf, 64);
mystr << i << "\0";
return string(buf);
}
Matrix::Matrix(int r, int c)
{
if ( r > 0 && c > 0 )
{
row = r;
col = c;
elems = new double[r * c]; //為矩陣動(dòng)態(tài)分配存儲(chǔ)
}
else
{
elems = NULL;
row=col=0;
}
} Matrix::Matrix( double* m, int r, int c )
{
if ( r > 0 && c > 0 )
{
row = r;
col = c;
elems = new double[r * c];
}
else
{
elems = NULL;
row=col=0;
}
if ( elems != NULL )
{
for (int i=0; i < r*c; i++)
{
elems[i] = m[i];
}
}
}
Matrix::Matrix( const Matrix &m ) : row( m.row ), col( m.col ) {
if ( NULL == m.elems )
{
elems = NULL;
}
else
{
int total = row*col;
elems = new double[total];
for( int i = 0; i < total; ++i )
{
elems[i] = m.elems[i];
}
}
}
Matrix::~Matrix()
{
delete []elems; //釋放矩陣所占的存儲(chǔ)
} Matrix& Matrix::operator =(const Matrix& b)
throw(IncompatibleDimension)
{
if( this == &b )
{
return *this;
}
if ( col != b.col || row !=b.row
)
{
throw( IncompatibleDimension(" Matrix "+int2String(row)
+ " x " + int2String(col) + " equails matrix "
+ int2String(b.row) + " x " + int2String(b.col)+".") );
}
row = b.row;
col = b.col;
delete []elems;
if ( NULL == b.elems )
{
elems = NULL;
}
else
{
int total = row*col;
elems = new double[total];
for( int i = 0; i < total; ++i )
{
elems[i] = b.elems[i];
}
}
return *this;
} //重載運(yùn)算符"( )"可以由給出的矩陣行列得到相應(yīng)的矩陣元素值。之所以重載"( )"而不是"[]"，是因?yàn)楸苊鈹?shù)組 elems 所造成的二義性
double& Matrix::operator () (int r, int c) throw(InvalidIndex)
{
if ( r<0 || r>=row || c<0 || c>=col )
{
throw( InvalidIndex(string("Get Element(")
+ int2String(r) + "," + int2String(c) + ")"
+ " from ("
+ int2String(row) + " x "
+ int2String(col) + ")" + " matrix." ) );
}
return elems[r*col+c];
}
const double& Matrix::operator () (int r, int c) const throw(InvalidIndex)
{
if ( r<0 || r>=row || c<0 || c>=col )
{
throw( InvalidIndex(string("Get Element(")
+ int2String(r) + "," + int2String(c) + ")"
+ " from ("
+ int2String(row) + " x "
+ int2String(col) + ")" + " matrix." ) );
}
return elems[r*col+c];
}
void Matrix::SetElem(int r, int c, double val) throw(InvalidIndex)
{
if ( r<0 || r>=row || c<0 || c>=col )
{
throw(InvalidIndex(string("Set Element(")
+ int2String(r) + "," + int2String(c) + ")"
+ " for ("
+ int2String(row) + " x "
+ int2String(col) + ")" + " matrix." ) );
}
elems[r*col+c] = val;
}
Matrix Matrix::operator*(const Matrix& b) const throw(IncompatibleDimension)
{
if ( col != b.row )
// incompatible dimensions
{
throw(IncompatibleDimension(" Matrix "+int2String(row)
+ " x " + int2String(col) + " times matrix "
+ int2String(b.row) + " x " + int2String(b.col)+"."));
}
Matrix ans(row, b.col);
for (int r=0 ; r < row ; r++)
{
for (int c=0 ; c < b.col; c++)
{
ans.SetElem(r, c, rowTimesCol(r, b, c) );
}
}
return ans; }
Matrix Matrix::operator +(const Matrix& b) const throw(IncompatibleDimension)
{
if ( col != b.col || row !=b.row
)
{
throw(IncompatibleDimension(" Matrix "+int2String(row)
+ " x " + int2String(col) + " adds matrix "
+ int2String(b.row) + " x " + int2String(b.col)+"."));
}
Matrix ans(row, col);
for (int r=0 ; r < row ; r++)
{
for (int c=0 ; c < col; c++)
{
ans.SetElem(r, c, elems[r*col+c]+b.elems[r*col+c]);
}
}
return ans;
}
Matrix Matrix::operator -(const Matrix& b) const throw(IncompatibleDimension)
{
if ( col != b.col || row !=b.row
)
{
throw( IncompatibleDimension(" Matrix "+int2String(row)
+ " x " + int2String(col) + " minus matrix "
+ int2String(b.row) + " x " + int2String(b.col)+".") );
}
Matrix ans(row, col);
for (int r=0 ; r < row ; r++)
{
for (int c=0 ; c < col; c++)
{
ans.SetElem(r, c, elems[r*col+c]-b.elems[r*col+c]);
}
}
return ans; }
void Matrix::Print() const
{
for (int i = 0; i < row; i++)
{
for (int j = 0; j < col-1; j++)
{
cout << elems[i*col+j] << "\t";
}
cout << elems[i*col+col-1];
cout<<endl;
}
cout<<endl;
}
double Matrix::rowTimesCol( int i, const Matrix &b, int j ) const
{
double sum=0.0;
for (int k = 0; k < col; k++)
{
sum += elems[i*col+k] * b.elems[k*b.col+j];
}
return sum; }
//測(cè)試文件 MatrixMain.cpp
#include <iostream>
//#include "Matrix.h"
using namespace std;
int main()
{
try
{
//創(chuàng)建矩陣對(duì)象
double a[20]= {1.0, 3.0, -2.0, 0.0, 4.0, -2.0, -1.0, 5.0, -7.0, 2.0, 0.0, 8.0, 4.0, 1.0, -5.0, 3.0, -3.0, 2.0, -4.0, 1.0};
double b[15]= {4.0, 5.0, -1.0, 2.0, -2.0, 6.0, 7.0, 8.0, 1.0, 0.0, 3.0, -5.0, 9.0, 8.0, -6.0};
Matrix x1(a, 4, 5);
cout<<"the matrix of x1 is:"<<endl;
x1.Print();
Matrix y1(b, 5, 3);
cout<<"the matrix of y1 is:"<<endl;
y1.Print();
Matrix z1 = x1*y1;
//兩個(gè)矩陣相乘
cout<<"the matrix of z1=x1*y1 is:"<<endl;
z1.Print();
Matrix x2(2, 2);
x2.SetElem(0, 0, 1.0); //為矩陣對(duì)象添加元素
x2.SetElem(0, 1, 2.0);
x2.SetElem(1, 0, 3.0);
x2.SetElem(1, 1, 4.0);
cout<<"the matrix of x2 is:"<<endl;
x2.Print();
cout<<"x1*x2 is:"<<endl;
x1*x2;
//兩個(gè)維數(shù)不匹配矩陣相乘，產(chǎn)生異常
cout<<"x1-x2 is:"<<endl;
x1-x2;
//兩個(gè)維數(shù)不匹配矩陣相減，產(chǎn)生異常
cout<<"Set a new element for x1:"<<endl;
x1.SetElem (7, 8, 30);
//設(shè)置矩陣元素超界，產(chǎn)生異常
cout<<"Get a element from x1:"<<endl;
x1(4, 5);
// 取不存在的矩陣元素，產(chǎn)生異常
}
catch(MatrixException& e)
{
cout << e.what() << endl; //獲取異常信息
}
return 0;
} 三、實(shí)驗(yàn) 步驟 及結(jié)果分析
1. 程序的類結(jié)構(gòu)圖為：
COMPLEX
#real:double #image:double +COMPLEX(double r=0,double i=0) +COMPLEX(const COMPLEX &other) +print():void
+operator+(const COMPLEX &other): COMPLEX +operator-(const COMPLEX &other) : COMPLEX +operator-(): COMPLEX +operator=(const COMPLEX &other) : COMPLEX
運(yùn)行結(jié)果
2. 程序的類結(jié)構(gòu)圖為：
T T
x, y:int
+T(int a,int b)
+&operator<<(ost ream &os,T &a):friend ostream
運(yùn)行結(jié)果
3. 程序的類結(jié)構(gòu)圖為：
Shape
+ +A A rea():virtual double
const
+PrintShapeName():virtual void
const
+Print():virtual void
const
Point x,y:int +Point(int=0,int=0)
+SetPoint (in t a,int b):void
+GetX():int const
+G etY():int const
+PointShapeName():virtual void const
+Print():virtual void const
Circle
r r adius:double
+ + Circle(int x=0,int y=0,double r=0.0)
+ + SetRadius(double r):void
+ + GetRadius():double const
+ + Area():virtual dou ble con st
+ + Print():virtual void const
+ + PrintShapeName():virtual void const
運(yùn)行結(jié)果
4. 程序的類結(jié)構(gòu)圖為：
Shape1 1
#x_size,y_size:double
+Shape1 1 (double x,double y)
+area():virtual double
+perimeter():virtual double e
+print():virtual void
相關(guān)代碼：
#include<iostream>
using namespace std; class Shape1 {
protected:
double x_size,y_size;
public:
Shape1(double x,double y);
// 構(gòu)造函數(shù)
virtual double area()
// 純虛函數(shù)，在派生類中重載
{
return 0.0; Circle1 1
#radiu s:double
+Ci rcle 1 (double e
x=0.0,double y=0.0,double r=0.0)
+set_radius(double r=0.0):void
+get_radius():double
+area():virtual double
+perimeter():virtual double
+print():virtual void
Square1 1
#i_size,j_size: double
+Square1 1 (double x=0.0,double y=0.0,
d d ouble
i=0.0 ,double j=0.0)
+set_i(double i):void
+set_j(double_j):void
+get_i():void
+ +g g et_j():void
+area():virtual double
+perimeter():virtual double
+print():virtual void
}
virtual double perimeter()
{
return 0.0;
}
virtual void print()=0; };
Shape1::Shape1(double a,double b) {
x_size=a;
y_size=b; }
class Circle1:public Shape1 {
protected:
double radius;
public:
Circle1(double x=0.0,double y=0.0,double r=0.0); // 構(gòu)造函數(shù)
void set_radius(double r=0.0);
//設(shè)置半徑
double get_radius();
//輸出半徑
virtual double area();
virtual double perimeter();
virtual void print();
//輸出圓心坐標(biāo)和半徑 };
Circle1::Circle1(double x,double y,double r):Shape1(x,y),radius(r)//構(gòu)造函數(shù) {} void Circle1::set_radius(double r) {
radius=r; } double Circle1::get_radius() {
return radius; } double Circle1::area() {
return 3.14159*radius*radius; } double Circle1::perimeter() {
return 3.14159*radius*2; } void Circle1::print()
//輸出圓心坐標(biāo) {
cout<<"["<<x_size<<","<<y_size<<"]"<<", "<<radius; }
class Square1:public Shape1 {
protected:
double i_size,j_size;
public:
Square1(double x=0.0,double y=0.0,double i=0.0,double j=0.0); // 構(gòu)造函數(shù)
void set_i(double i);
//設(shè)置頂點(diǎn)橫坐標(biāo)
void set_j(double j);
//設(shè)置頂點(diǎn)縱坐標(biāo)
double get_i();
//輸出頂點(diǎn)橫坐標(biāo)
double get_j();
//輸出頂點(diǎn)縱坐標(biāo)
virtual double area();
virtual double perimeter();
virtual void print();
//輸出中心坐標(biāo)和頂點(diǎn)坐標(biāo)
};
Square1::Square1(double x,double y,double i,double j):Shape1(x,y),i_size(i),j_size(j) {}
void Square1::set_i(double i) {
i_size=i; } void Square1::set_j(double j) {
j_size=j; } double Square1::get_i() {
return i_size; } double Square1::get_j() {
return j_size; } double Square1::area() {
return 2*(i_size-x_size)*2*(j_size-y_size); } double Square1::perimeter() {
return 4*2*(i_size-x_size); } void Square1::print()
{
cout<<"["<<x_size<<","<<y_size<<"]"<<", "<<"["<<i_size<<","<<j_size<<"]"; }
int main()
{
Circle1 circle(0.0,0.0,3.0);
circle.area();
circle.perimeter();
circle.print();
cout<<"\n";
Square1 square(0.0,0.0,3.0,3.0);
square.area();
square.perimeter();
square.print();
cout<<"\n";
cout<<"圓的面積為："<<circle.area()<<endl;
cout<<"圓的周長(zhǎng)為："<<circle.perimeter()<<endl;
cout<<"圓的圓心坐標(biāo)和半徑為：";
circle.print();
cout<<"\n\n";
cout<<"正方形的面積為："<<square.area()<<endl;
cout<<"正方形的周長(zhǎng)為："<<square.perimeter()<<endl;
cout<<"正方形的中心坐標(biāo)和一個(gè)頂點(diǎn)坐標(biāo)分別為：";
square.print();
cout<<"\n";
return 0; } 運(yùn)行結(jié)果
【實(shí)例編程】
運(yùn)行結(jié)果
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