矩形相关操作

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题目描述

如下结构用来存储图像屏幕上的对象信息。
struct point {int x, y;};
struct rectangle{struct point upper_left, lower_right;};
编写函数，要求可以在rectangle结构变量r上执行以下操作，且r作为实际参数传递
1.计算r的面积
2.计算r的中心，并且以此中心作为point值返回，如果中心的x或y坐标不为整数，取整数值
3.确定点p是否在r内，返回1或0.(p是struct point类型的另外一个实际参数)

输入描述

输入分两行
第一行输入四个整数，分别代表矩形的左上角和右下角坐标
第二行输入两个整数，代表某个点的坐标

输出描述

输出分三行
Area of r is 面积值
Center of r is <中心点坐标>
Point <输入点的坐标> is [not] in r

代码

<span style="font-size:14px;">#include<iostream>using namespace std;struct point{int x, y;};struct rectangle{struct point upper_left, lower_right;};int mj(int x1, int y1, int x2, int y2){int s;s = (x2 - x1)*(y1 - y2);return s;}struct point u(int x1, int y1, int x2, int y2){point p;p.x = (x1 + x2) / 2; p.y = (y1 + y2) / 2;return p;}int r(int x1, int y1, int x2, int y2, int x3, int y3){if ((x1 <= x3) && (x3 <= x2) && (y1 >= y3) && (y3 >= y2))return 1;elsereturn 0;}int main(){int s,a;int x1, x2, y1, y2, x3, y3;struct point b;cin >> x1 >> y1 >> x2 >> y2;cin >> x3 >> y3;struct point upper_left = { x1, y1 };struct point lower_right = { x2, y2 };s = mj(x1, y1, x2, y2);b=u(x1, y1, x2, y2);cout << "Area of r is " << s << endl;cout << "Center of r is <" << b.x<<","<<b.y << ">" << endl;a = r(x1, y1, x2, y2, x3, y3);if (a ==1)cout << "Point " << "<" << x3 << "," << y3 << "> is in r";elsecout << "Point " << "<" << x3 << "," << y3 << "> is not in r";return 0;}</span>

是struct oint类型的另外一个实际参数)

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