##c##写法

#include<iostream>
using namespace std;
class Rectangle{
public:
    int j;
void area(int X=0,int Y=0,int A=0,int B=0);
private:
int x,y,a,b;
};
void Rectangle::area(int X,int Y,int A,int B){
x=X;y=Y;a=A;b=B;
j=(a-x)*(b-y);
 }
 int main(){
int x,y,a,b;
Rectangle rectangle;
cout<<"输入左下角坐标x和y"<<endl;
cin>>x>>y;
cout<<"输入右上角坐标为a和b"<<endl;
cin>>a>>b;
     rectangle.area(x,y,a,b);
cout<<"该矩形面积为："<<rectangle.j<<endl;
return 0;
 }

## 1  编写一个rectangle 类，属性为左上角和右下角的坐标，编写方法，计算矩形面积

class Rectangle:  def __init__(self,x1=0,y1=0,x2=1,y2=1):      self.x1=x1      self.y1=y1      self.x2=x2      self.y2=y2  def print_area(self,t):      print((t.x2-t.x1)*(t.y2-t.y1))t=Rectangle()t.x1=1.0t.x2=2.1t.y1=2.0t.y2=3.2t.print_area(t)

#### 编写一个stu 类，属性包括学号，和三门成绩，编写方法，输出平均成绩，并输出是否通过。

class stud:    stuid=''    score1=''    score2=''    score3=''    def setstuid(self,stuid):        self.stuid=stuid    def setscore1(self,score1):        self.score1=score1    def setscore2(self,score2):        self.score2=score2    def setscore3(self,score3):        self.score3=score3    def getstuid(self,stuid):        return self.stuid    def getscore1(self,score1):        return self.score1    def getscore2(self,score2):        return self.score2    def getscore3(self,score3):        return self.score3

def addstudent():    stu=stud()    stuid=input('请输入学号id：')    stu.setstuid(stuid)    score1 = input('请输入成绩一：')    stu.setscore1(score1)    score2 = input('请输入成绩二：')    stu.setscore2(score2)    score3 = input('请输入成绩三：')    stu.setscore3(score3)    avg=(int(stu.score1)+int(stu.score2)+ int(stu.score3))/3    print(avg)

    if int(stu.score1) < 60:       print('failed')    elif int(stu.score2) < 60:       print('failed')    elif int(stu.score3) < 60:       print('failed')    else:       print('passwd')

addstudent()