头歌实验--面向对象程序设计
目录
实验五 类的继承与派生
第1关：简易商品系统
任务描述
答案代码
第2关：公司支出计算
任务描述
答案代码
第3关：棱柱体问题
任务描述
答案代码
实验五 类的继承与派生
第1关：简易商品系统
任务描述
答案代码
#include<iostream>
#include<string>
using namespace std;
/***********begin**********/
//此处完成各个类的书写，并实现题目输出
class Shirt {
private:string place;int price;int num;string mar;
public:Shirt(string, int, int, string);void InStorage(int i);void OutStorage(int j);void Calculate();
};
Shirt::Shirt(string a, int b, int c, string d)
{place = a;price = b;num = c;mar = d;
}
void Shirt::InStorage(int i)
{num = num + i;
}
void Shirt::OutStorage(int j)
{if (j > num){cout << "Insufficient number!" << endl;num = 0;}else {num = num - j;}
}
void Shirt::Calculate()
{int m;m = num * price;cout << "total money=" << m << endl;
}
class Cap:public Shirt
{
public:Cap(string, int, int, string, string);
private:string shape;
};
Cap::Cap(string a, int b, int c, string d, string e):Shirt(a,b,c,d),shape(e){}class Capboard:public Shirt
{
public:Capboard(string, int, int, string, string);
private:string color;
};
Capboard::Capboard(string a,int b,int c,string d,string f):Shirt(a,b,c,d),color(f){}/**********end***********/int main() {Shirt s1("江西南昌", 235, 150, "纯棉");Cap p1("四川成都", 88, 150, "尼龙", "平顶");Capboard cup1("云南昆明", 3500, 10, "云松木", "原色");int i, j, k, m;cin >> i >> j >> k >> m;s1.InStorage(i);s1.OutStorage(j);p1.OutStorage(k);cup1.OutStorage(m);s1.Calculate();p1.Calculate();cup1.Calculate();
}第2关：公司支出计算
任务描述
答案代码
#include<iostream>
#include<stdlib.h>
#include<string>
using namespace std;
//请在此处完成YearWork,MonthWorker,WeekWoker及Company类的编码
/***********begin***********/
class Employee{public:virtual int earning()=0;
};
class YearWorker:public Employee{int salary;public:YearWorker(int s){salary=s;}virtual int earning(){return salary;}
};
class MonthWorker:public Employee{int salary;public:MonthWorker(int s){salary=s;}virtual int earning(){return salary*12;}
};
class WeekWorker:public Employee{int salary;public:WeekWorker(int s){salary=s;}virtual int earning(){return salary*52;}
};
class Company{public:Employee *emp[30];Company(){for(int i=0;i<30;i++){emp[i]=NULL;}}int salarypay(){int total=0;for(int i=0;i<30;i++){if(emp[i]!=NULL){total+=emp[i]->earning();}}return total;}
};
/************end**********/
int main() {Company co;for (int i = 0; i < 30; i++){int r = rand() % 3 + 1;switch (r) {case 1:co.emp[i] = new WeekWorker(580);break;case 2:co.emp[i] = new MonthWorker(2500);break;case 3:co.emp[i] = new YearWorker(22000);break;default:break;}}cout << "company total pay=" << co.salarypay();return 0;
}第3关：棱柱体问题
任务描述
答案代码
#include <iostream>
using namespace std;
#include<string>
#include"time.h"
#include"math.h"
#define PI 3.14/*********begin**********/
class Plane
{
public:virtual double area() = 0;//求面积函数
};
class Rectangle :public virtual Plane
{
public:double length, width;//长和宽Rectangle(double l, double w) :length(l), width(w) {};virtual double area(){return length * width;//覆盖求面积函数}
};
class Square :public Rectangle{
public:Square(double l) :Rectangle(l,l) {};//析造函数
};
class Circle :public virtual Plane
{
public:double radius;//半径Circle(double r) :radius(r) {};virtual double area(){return 3.14 * radius * radius;}
};
class Triangle :public virtual Plane
{public:double a, b, c;Triangle(double a, double b, double c) :a(a), b(b), c(c) {};virtual double area(){double p;p = (a + b + c) / 2;return sqrt(p * (p - a) * (p - b) * (p - c));}
};
class Body
{
public:virtual double volume() = 0;//体积virtual double superficialarea() = 0;//表面积
};
class Triangularprism :public Triangle,public Body
{
private:double height;
public:Triangularprism( int n,double h, double a, double b, double c) :Triangle(a, b, c), height(h) {};virtual double volume(){return Triangle::area() * height;}virtual double superficialarea() {return (Triangle::area() * 2 + Triangle::a * height + Triangle::b * height + Triangle::c * height);}
};
class Circularcolumn :public Circle,public Body
{
private:double height;
public:Circularcolumn(int n, double h, double r) :Circle(r), height(h) {};virtual double volume(){return Circle::area() * height;}virtual double superficialarea(){return (Circle::radius* 2*3.14*height + Circle::area() * 2 );}
};
class Quadrangular :public Rectangle,public Body
{
private:double height;
public:Quadrangular(int n, double h, double l) :Rectangle(l,l), height(h) {};virtual double volume(){return Rectangle::area() * height;}virtual double superficialarea(){return (Rectangle::area() * 2 + Rectangle::width * height * 2 + Rectangle::length * height*2);}
};/**********end********/
int main() {int n;double height,r,t1,t2,t3,l;cin>>n>>height>>r;//输入n=0，表示圆柱体Circularcolumn c1(n,height,r);cin>>n>>height>>t1>>t2>>t3;//输入n=3,表示三棱柱Triangularprism t(n,height,t1,t2,t3);cin>>n>>height>>l;//输入n=4表示正四棱柱Quadrangular qu(n,height,l);Body *body[3];body[0]=&c1;body[1]=&t;body[2]=&qu;double superficalsum=0;double volumesum=0;for(int i=0;i<3;i++){volumesum+=body[i]->volume();//volume()获取该体的体积superficalsum+=body[i]->superficialarea();//获取该体的表面积}cout<<"all volume="<<volumesum<<endl;cout<<"all superfilarea="<<superficalsum<<endl;
}