87 lines
1.4 KiB
C++
87 lines
1.4 KiB
C++
#include <iostream>
|
||
using namespace std;
|
||
class Point {
|
||
public:
|
||
Point(int x, int y);
|
||
Point(Point &p);
|
||
~Point();
|
||
void Set(double x, double y);
|
||
void Print();
|
||
|
||
private:
|
||
double X, Y;
|
||
};
|
||
|
||
Point::Point(int x, int y) {
|
||
X = x;
|
||
Y = y;
|
||
}
|
||
|
||
Point::Point(Point &p) {
|
||
X = p.X;
|
||
Y = p.Y;
|
||
}
|
||
|
||
void Point::Set(double x, double y) {
|
||
X = x;
|
||
Y = y;
|
||
}
|
||
|
||
void Point::Print() {
|
||
cout << '(' << X << "," << Y << ")" << endl;
|
||
}
|
||
|
||
Point::~Point() {
|
||
cout << "Point的析构函数被调用！" << endl;
|
||
}
|
||
|
||
class Line : public Point {
|
||
public:
|
||
Line(int x, int y, int s);
|
||
Line(Line &p);
|
||
~Line();
|
||
void Set(double x, double y, double s);
|
||
void Print();
|
||
|
||
private:
|
||
double S;
|
||
};
|
||
// Line::Line(int x, int y, int s) ____________ { // Blank 7
|
||
|
||
Line::Line(int x, int y, int s) : Point(x, y) {
|
||
S = s;
|
||
}
|
||
|
||
// Line::Line(Line &p) __________ { // Blanck 8
|
||
|
||
Line::Line(Line &p) : Point(p) {
|
||
S = p.S;
|
||
}
|
||
|
||
void Line::Set(double x, double y, double s) {
|
||
// _________________; // Blank 9
|
||
|
||
Point::Set(x, y);
|
||
S = s;
|
||
}
|
||
|
||
void Line::Print() {
|
||
cout << "直线经过的点：";
|
||
//_______________________; //Blank 10
|
||
|
||
Point::Print();
|
||
cout << "斜率为：S=" << S << endl;
|
||
}
|
||
|
||
Line::~Line() {
|
||
cout << "Line析构函数被调用！" << endl;
|
||
}
|
||
|
||
int main() {
|
||
Line C1(1, 1, 5);
|
||
C1.Print();
|
||
Line C2(C1);
|
||
C2.Set(3, -3, 10);
|
||
C2.Print();
|
||
return 0;
|
||
} |