期末复习-编程题

1、编写一个程序计算“三角形（Triangle）、正方形（Square）、圆形（Circle）”三种图形的面积，要求：
a)抽象出一个基类base；
b)在其中说明一个虚函数用来求面积；
c)利用派生类定义“三角形、正方形、圆形”；
d)编写主函数并测试。

2、定义一个基类Person有姓名、性别、年龄属性，再由基类派生出教师类（Teacher）和学生类（Student），教师类增加工号、职称和工资属性，学生类增加学号、班级、专业和入学成绩属性，要求每个类中至少包含一个构造函数。

3、声明一个shape抽象类，在此基础上派生出Rectangle和Circle类，二者都有GetArea()函数计算对象的面积，按下面的要求完成程序的编制工作。

（1）Rectangle类有Width，Height属性；
（2）Circle类有Radius属性；
（3）分别编写Rectangle类和Circle类带默认参数的构造函数；
（4）编写主函数进行测试，要求能输出面积
4、教材实训6：编制一个排序数组类（重点：理解其中的冒泡排序算法、使用引用参数实现数据交换等）
{
public:
double area(double s=0);
};
class Triangle:public base
{
double D,H;
public:
Triangle (double d=0,double h=0)
{
D=d;
H=h;
}
double area()
{
double s;
s=(D*H)/2;
return s;
}
void display()
{
cout<<"三角形的面积:"<<area()<<endl;
}
};
class Square:public base
{
double L;
public:
Square(double l=0)
{
L=l;
}
double area()
{
double s;
s=L*L;
return s;
}
void display()
{
cout<<"正方形的面积为:"<<area()<<endl;
}
class Circle:public base
{
double R;
public:
Circle(double r=0)
{
R=r;
}
double area()
{
double s;
s=3.14*R*R;
return s;
}
void display()
{
cout<<"圆形的面积为:"<<area()<<endl;
}
};
#include<string.h>
class Person
{
private:
char *name;
char *sex;
int age;
public:
Person(char *n,char *s,int a)
{
name=n;
sex=s;
age=a;
}
void display()
{
cout<<"姓名为:"<<name<<endl;
cout<<"性别为:"<<sex<<endl;
cout<<"年龄为:"<<age<<endl;
}
};
class Teacher:public Person
{
private:
char *gonghao;
char *zhicheng;
int mony;
public:
Teacher(char *n,char *s,int a,char *g,char *z,int m):Person(n,s,a)
{
gonghao=g;
zhicheng=z;
mony=m;
}
void display1()
{
cout<<"工号为:"<<gonghao<<endl;
display();
cout<<"职称为:"<<zhicheng<<endl;
cout<<"工资为:"<<mony<<endl;
}
};
class Student:public Person
{
private:
char *xuehao;
char *banji;
char *zhuanye;
int score;
public:
Student(char *n,char *s,int a,char *x,char *b,char *zh,int sc):Person(n,s,a)
{
xuehao=x;
banji=b;
zhuanye=zh;
score=sc;
}
void display2()
{
cout<<"学号为:"<<xuehao<<endl;
display();
cout<<"班级为:"<<banji<<endl;
cout<<"专业为:"<<zhuanye<<endl;
cout<<"入学成绩为:"<<score<<endl;
}
};
void main()
{
Teacher teacher("纪淼","男",19,"123","男神",10000);
teacher.display1();
Student student("纪淼","男",19,"JV144101","软件1班","软件工程",750);
student.display2();
}
#include<iostream.h>
class shape
{
public:
shape(){};
};
class Rectangle:public shape
{
private:
int width;
int height;
public:
Rectangle(int w,int h)
{
width=w;
height=h;
}
int area()
{
int s;
s=(width*height)/2;
return s;
}
void display()
{
cout<<"三角形的面积为:"<<area()<<endl;
}
};
class Circle:public shape
{
private:
int radius;
public:
Circle(int r)
{
radius=r;
}
int area()
{
int s;
s=3.14*radius*radius;
return s;
}
void display()
{
cout<<"圆形面积为:"<<area()<<endl;
}
};
void main()
{
Rectangle rectangle(2,4);
rectangle.display();
Circle circle(2);
circle.display();
}。