矩形面积计算

矩形面积计算

题目描述
已知矩形的边与坐标轴平行,试求其周长,面积,以及两个矩形相交部分面积。

输入格式
x1 y1 x2 y2 x3 y3 x4 y4

说明:输入为8个整数,中间以空格分隔。前四个整数确定第一个矩形的位置,形如 x1 y1 x2 y2,其中为左下角坐标,为右上角坐标。后四个整数确定第二个矩形的位置。

输出格式
5个整数,以空格分隔,分别是第一个矩形的周长、面积;第二个矩形的周长、面积;以及两个矩形相交部分面积。
输入样例
1 1 4 4 2 2 5 5
输出样例
12 9 12 9 4

#include 
#include 
#include 
#include 

using namespace std;

class Point
{
public:
    Point(int xx = 0, int yy = 0)
    {
        _x = xx;
        _y = yy;
    }
    Point(Point &p);

    int getX();
    int getY();

private:
    int _x;
    int _y;
};

Point::Point(Point &p)
{ //复制构造函数的实现
    _x = p._x;
    _y = p._y;
}

int Point::getX()
{
    return this->_x;
}
int Point::getY()
{
    return this->_y;
}

class Line
{
public:
    Line(Point &a, Point &b);
    int getLength();

private:
    void calLength(); //计算线段长度,并保存到属性 _len 中
    Point _pa, _pb;
    int _len;
};

Line::Line(Point &a, Point &b) : _pa(a), _pb(b)
{
    this->calLength();
}

int Line::getLength()
{
    return this->_len;
}

//只考虑平行状况
void Line::calLength()
{
    int x=abs(_pa.getX()-_pb.getX());
    int y=abs(_pa.getY()-_pb.getY());
    _len=sqrt(x*x+y*y);
}

class Rectangle
{
public:
    Rectangle(Point &lb_pt, Point &rt_pt); //两个输入参数分别是左下角,右上角

    int getPerimeter();                    //周长
    int getArea();                         //面积
    int getOverlappedArea(Rectangle &rec); //计算与另一个矩形重合面积

private:
    bool isOverlapped(Rectangle &rec);
    Point _LB, _RT, _LT, _RB; //左下角,左上角,右下角,右上角
    Line _horizontal_line;
    Line _vertical_line;
};

Rectangle::Rectangle(Point &lb_pt, Point &rt_pt) : _LB(lb_pt),
                                                   _RT(rt_pt),
                                                   _LT(_LB.getX(), _RT.getY()),
                                                   _RB(_RT.getX(), _LB.getY()),
                                                   _horizontal_line(_LB, _RB),
                                                   _vertical_line(_LB, _LT)
{
}

int Rectangle::getPerimeter()
{
    return 2 * (this->_horizontal_line.getLength() + this->_vertical_line.getLength());
}

int Rectangle::getArea()
{
    return this->_horizontal_line.getLength() * this->_vertical_line.getLength();
}

int Rectangle::getOverlappedArea(Rectangle &rec)
{
    if (!this->isOverlapped(rec))
    {
        return 0;
    }
    else
    {
         int a[4]={0},b[4]={0};
        a[0]=_LB.getX()-_RT.getX();
        a[1]=_LB.getX()-rec._RT.getX();
        a[2]=rec._LB.getX()-_RT.getX();
        a[3]=rec._LB.getX()-rec._RT.getX();
        b[0]=_RT.getY()-_LB.getY();
        b[1]=_RT.getY()-rec._LB.getY();
        b[2]=rec._RT.getY()-_LB.getY();
        b[3]=rec._RT.getY()-rec._LB.getY();
        int x=abs(a[0]),y=abs(b[0]);//x为长,y为宽
        for(int i=1;i<4;i++){
            if(abs(a[i])0&&(R_L*R_R)>0)||((T_T*T_B)>0&&(B_T*B_B)>0)){
        return false;
    }
    else return true;
}

int main()
{
    int x1, y1, x2, y2;
    cin >> x1 >> y1 >> x2 >> y2;
    int x3, y3, x4, y4;
    cin >> x3 >> y3 >> x4 >> y4;

    Point p1(x1, y1), p2(x2, y2), p3(x3, y3), p4(x4, y4);

    Rectangle rec1(p1, p2);
    Rectangle rec2(p3, p4);
    cout << rec1.getPerimeter() << " " << rec1.getArea();
    cout << " " << rec2.getPerimeter() << " " << rec2.getArea();
    cout << " " << rec1.getOverlappedArea(rec2);
    return 0;
}

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