实验六

实验六

实验六1

源码

#include<iostream>
using namespace std;
class chip{
	protected:
		int m;
		int n;
		double result;
	public:
		chip(int a,int b,int c=0):m(a),n(b),result(c){}
		void addition(){
			cout<<m<<"+"<<n<<"=";
			result=m+n;
			cout<<result<<endl;
			result=0;
		}
};
class chip_A:public chip{
	public:
		chip_A(int a,int b,int c=0):chip(a,b,c){}
		void subraction(){
			cout<<m<<"-"<<n<<"=";
			result=m-n;
			cout<<result<<endl;
			result=0;
		}
};
class chip_B:public chip{
	public:
		chip_B(int a,int b,int c=0):chip(a,b,c){}
		void mutilp(){
			cout<<m<<"*"<<n<<"="; 
			result=m*n;
			cout<<result<<endl;
			result=0;
		}

};
class chip_C:public chip{
	public:
		chip_C(int a,int b,int c=0):chip(a,b,c){}
		void chufa(){
			cout<<m<<"/"<<n<<"=";
			result=(double)m/(double)n;
			cout<<result<<endl;
			result=0;
		}

};
int main(){
	chip_A chip1(4,2);
	chip1.addition();
	chip1.subraction();
	chip_B chip2(3,4);
	chip2.mutilp();
	chip_C chip3(6,4);
	chip3.chufa();
	return 0; 
	
}

运行结果：

实验六2

源码：

#include<iostream>
using namespace std;
class vehicle{
	private:
		int maxspeed;
		int weight;
	public:
		vehicle(int a,int b):maxspeed(a),weight(b){	}
		void run(){
			cout<<"running by"<<maxspeed<<endl;
		}
		void stop(){
			cout<<"stop"<<endl;
		}
		~vehicle(){}
};
class bicycle:virtual public vehicle{
	private:
		int height;
	public:
		bicycle(int a,int b,int c):vehicle(a,b),height(c){}
		~bicycle(){}
};
class motorcar:virtual public vehicle{
	private:
		int seatnum;
	public:
		motorcar(int a,int b,int c):vehicle(a,b),seatnum(c){}
		~motorcar(){}
}; 
class motorcycle:public bicycle,public motorcar{
	public:
		motorcycle(int a,int b,int c,int d):bicycle(a,b,c),motorcar(a,b,d),vehicle(a,b){	}
		~motorcycle(){}
};

int main(){
	bicycle A(10,5,3);
	A.run();
	A.stop();
	motorcar B(10,4,4);
	B.run();
	B.stop();
	motorcycle C(10,5,4,4);
	C.run();
	C.stop();
	return 0;
} 

运行结果：

实验六3

项目二：

源码：

类的定义

class Fraction{
	public:
		Fraction(int a=0,int b=1 ):top(a),bottom(b){}//构造函数 
		Fraction operator+(const Fraction &a);
		Fraction operator-(const Fraction &b);
		Fraction operator*(const Fraction &c);		
		Fraction operator/(const Fraction &d);//运算符重载函数； 
		void output();	//输出函数 
		void compare(Fraction &a);//比较函数；	
	private:
		int top;//分子； 
		int bottom;//分母; 
};

类的实现

#include"Fraction.h"
#include<iostream>string gon()
#include<cmath>
using namespace std;
Fraction Fraction::operator+(const Fraction &a){
	return Fraction(top*a.bottom+a.top*bottom,a.bottom*bottom);
}
Fraction Fraction::operator-(const Fraction &b){
	return Fraction(top*b.bottom-b.top*bottom,bottom*b.bottom);
}
Fraction Fraction::operator*(const Fraction &c){
	return Fraction(top*c.top,bottom*c.bottom);	 
}
Fraction Fraction::operator/(const Fraction &d){
	return Fraction(top*d.bottom,bottom*d.top);
}

void Fraction::output(){
	int t,x,y;
	if(abs(top)>abs(bottom))
		t=abs(bottom);
	else
		t=abs(top);
	for(int i=1;i<t;i++){
		if(top%i==0&&bottom%i==0){
			top/=i;
			bottom/=i;
			i=1;
		}
	}
	if(bottom<0){
		top*=-1;
		bottom*=-1;
	}
	cout<<top<<"/"<<bottom<<endl; 
}

主函数

#include"Fraction.h"
#include<iostream>
using namespace std;
int main(){
	Fraction a(1,-6);
	Fraction b(4,-6);
	Fraction c;
	c=a+b;
	c.output();
	c=a*b;
	c.output(); 
	c=a/b;
	c.output();
	c=a-b;
	c.output();
	return 0;
}

运行结果：

总结

实验三中因为不明白老师所要求的派生类是什么意思，就没有写。对于函数的多态还有继承需要更多的尝试和理解。