ProblemI平面上的點和線分析

1、Problem I 平面上的點和線Point類、Line類 (VI)Time Limit:1 SecMemory Limit:128 MBSubmit:3279Solved:1467SubmitStatusWeb BoardDescription在數(shù)學(xué)上，平面直角坐標(biāo)系上的點用X軸和Y軸上的兩個坐標(biāo)值唯一確定，兩點確定一條線段。現(xiàn)在我們封裝一個“Point類”和“Line類”來實現(xiàn)平面上的點的操作。根據(jù)“append.cc”，完成Point類和Line類的構(gòu)造方法和show()方法，輸出各Line對象和Point對象的構(gòu)造和析構(gòu)次序。接口描述：Point:show()方法：按格式輸出Point

2、對象。Point:x()方法：取x坐標(biāo)。Point:y()方法：取y坐標(biāo)。Line:show()方法：按格式輸出Line對象。Line:SetLine(double, double, double, double)方法：設(shè)置Line對象起點的x,y坐標(biāo)（第一個和第二參數(shù)）和終點的x,y坐標(biāo)（第三個和第四個坐標(biāo)），并返回本對象Line:SetLine(const Point &, const Point &)方法：設(shè)置Line對象的起點（第一個參數(shù)）和終點（第二個坐標(biāo)），并返回本對象Line:SetLine(const Line&)方法：設(shè)置Line對象，復(fù)制參數(shù)的坐標(biāo)，并返回本對象Line:r

3、eadLine()方法：從標(biāo)準(zhǔn)輸入上讀入坐標(biāo)，格式見SampleLine:start()方法：取Line的起點Line:end()方法：取Line的終點Line:setStart()方法：設(shè)置Line的起點Line:setEnd()方法：設(shè)置Line的終點以下三個函數(shù)用于輸出Line對象，格式同sampleshowLineCoordinate(const Line&)showLinePoint(const Line&)showLine(const Line&)Input輸入的第一行為N，表示后面有N行測試樣例。每行為兩組坐標(biāo)“x,y”，分別表示線段起點和終點的x坐標(biāo)和y坐標(biāo)，兩組坐標(biāo)間用一個空

4、格分開，x和y的值都在double數(shù)據(jù)范圍內(nèi)。Output輸出為多行，每行為一條線段，起點坐標(biāo)在前終點坐標(biāo)在后，每個點的X坐標(biāo)在前，Y坐標(biāo)在后，Y坐標(biāo)前面多輸出一個空格，用括號包裹起來。輸出格式見sample。C語言的輸入輸出被禁用。Sample Input40,0 1,11,1 2,32,3 4,50,1 1,0Sample OutputPoint : (1, -2) is created.Point : (2, -1) is created.Point : (0, 0) is created.Point : (0, 0)Point : (0, 0) is created.Point : (

5、0, 0) is created.Line : (0, 0) to (0, 0) is created.Point : (0, 0) is created.Point : (0, 0) is created.Line : (0, 0) to (0, 0) is created.Point : (0, 0) is created.Point : (0, 0) is created.Line : (0, 0) to (0, 0) is created.Point : (0, 0) is created.Point : (0, 0) is created.Line : (0, 0) to (0, 0

6、) is created.Point : (0, 0) is created.Point : (0, 0) is created.Line : (0, 0) to (0, 0) is created.Line : (0, 0) to (1, 1)Line : (1, 1) to (2, 3)Line : (2, 3) to (4, 5)Line : (0, 1) to (1, 0)Point : (1, -2) is copied.Point : (2, -1) is copied.Line : (1, -2) to (2, -1) is created.Point : (1, -2) is

7、copied.Point : (0, 0) is copied.Line : (1, -2) to (0, 0) is created.Point : (2, -1) is copied.Point : (0, 0) is copied.Line : (2, -1) to (0, 0) is created.Point : (1, -2) is copied.Point : (2, -1) is copied.Line : (1, -2) to (2, -1) is copied.Line : (1, -2) to (2, -1)Line : Point : (1, -2) to Point

8、: (0, 0)Line : Point : (1, -2) to Point : (2, -1)Line : (0, 0) to (2, -1)Line : (0, 0) to (2, -1) is erased.Point : (2, -1) is erased.Point : (0, 0) is erased.Line : (1, -2) to (2, -1) is erased.Point : (2, -1) is erased.Point : (1, -2) is erased.Line : (1, -2) to (0, 0) is erased.Point : (0, 0) is

9、erased.Point : (1, -2) is erased.Line : (1, -2) to (2, -1) is erased.Point : (2, -1) is erased.Point : (1, -2) is erased.Line : (0, 1) to (1, 0) is erased.Point : (1, 0) is erased.Point : (0, 1) is erased.Line : (2, 3) to (4, 5) is erased.Point : (4, 5) is erased.Point : (2, 3) is erased.Line : (1,

10、1) to (2, 3) is erased.Point : (2, 3) is erased.Point : (1, 1) is erased.Line : (0, 0) to (1, 1) is erased.Point : (1, 1) is erased.Point : (0, 0) is erased.Line : (0, 0) to (2, -1) is erased.Point : (2, -1) is erased.Point : (0, 0) is erased.Point : (0, 0) is erased.Point : (2, -1) is erased.Point

11、: (1, -2) is erased.HINTAppend Code#include#includeusing namespace std;class Pointdouble ax,ay;public:friend class Line;Point(Point &a)ax=a.ax;ay=a.ay;coutPoint : (ax, ay) is copied.endl;Point(double x=0,double y=0):ax(x),ay(y)coutPoint : (ax, ay) is created.endl;/Point():ax(0),ay(0)Point()coutPoint

12、 : (ax, ay) is erased.endl;double x()const return ax;double y()constreturn ay;void showNoEndOfLine()constcoutPoint : (ax, ay);void show()coutPoint : (ax, ay)endl;class LinePoint p,q;public:Line():p(0,0),q(0,0)coutLine : (p.ax, p.ay) to (q.ax, q.ay) is created.endl;Line ( Line &a):p(a.p),q(a.q)coutLi

13、ne : (p.ax, p.ay) to (q.ax, q.ay) is copied.endl;Line(Point &a,Point &b):p(a),q(b)coutLine : (p.ax, p.ay) to (q.ax, q.ay) is created.endl;Line(double x1,double y1,double x2,double y2):p(x1,y1),q(x2,y2)coutLine : (p.ax, p.ay) to (q.ax, q.ay) is created.endl;Line()coutLine : (p.ax, p.ay) to (q.ax, q.a

14、y) is erased.p.axcp.ayq.axcq.ay;Line&setLine(Line &a)*this=a;return *this;Line&setLine(Point &a,Point &b)p=a;q=b;return *this;const Point &start()constreturn p;const Point &end()constreturn q;void setStart(Point &a)p=a;void setEnd(Point &b)q=b;void show()const coutLine : (p.ax, p.ay) to (q.ax, q.ay)

15、endl;void showLineCoordinate(const Line& line)std:coutLine : ;std:cout(line.start().x(), line.start().y();std:cout to ;std:cout(line.end().x(), line.end().y();std:coutstd:endl;void showLinePoint(const Line& line)std:coutLine : ;line.start().showNoEndOfLine();std:cout to ;line.end().showNoEndOfLine();std:coutnum;Line linenum +