C++实验四

1.
//complex.h
class Complex{
	public:
		Complex(float X,float Y):x(X),y(Y){}
		Complex(float X):x(X){}
		void add(Complex &c);
		void show();
	private:
		float x,y;
};
//Complex.cpp
#include"Complex.h"
#include<iostream>
using namespace std;
void Complex::add(Complex &c){
	x+=c.x;
	y+=c.y;
}
void Complex::show(){
	cout<<x<<"+"<<y<<"i"<<endl;
}
#include <iostream>
#include"Complex.h"
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char** argv) {
	Complex c1(3,5);
	Complex c2=4.5;
	c1.add(c2);
 

	c1.show();
	return 0;
}

　　

2.类的定义

//Graph.h
class Graph{
	public:
		Graph(char CH,int N):ch(CH),n(N){}//构造函数
	    void draw();//绘制图形
	private:
		char ch;int n;
};

　类的实现

//Graph.cpp
#include"Graph.h"
#include<iostream>
using namespace std;
void Graph::draw(){
	for(int y=1;y<=n;y++)//行 
	{
	for(int i=y;i<=n;++i)//空格数 
	   {
		if(i!=n)
		cout<<" ";
		if(i==n)
		   {
		    for(int x=1;x<=2*y-1;++x)//符号个数 
		    cout<<ch;	
		   }
	   } 
	   cout<<endl;
    }
}

　　

#include <iostream>
#include"Graph.h"
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char** argv) {
	Graph graph1('*',5);
	graph1.draw();
	Graph graph2('$',7);
	graph2.draw();
	return 0;
}

　　

3.(1)

#include<iostream>
using namespace std;
class Fraction{
	public:
		Fraction(int t=0,int b=1);
		void show();
	private:
		int top,bot;
};
Fraction::Fraction(int t,int b):top(t),bot(b){}
void Fraction::show(){
	cout<<top<<"/"<<bot<<endl;
}
int main(){
	Fraction a;
	a.show();
	Fraction b(3,4);
	b.show();
	Fraction c(5);
	c.show();
	return 0;
}

　　

(2)

#include<iostream>
using namespace std;
class Fraction{
	public:
		Fraction(int t=0,int b=1);
		void show();
		void jia(Fraction &a);
		void jian(Fraction &a);
		void cheng(Fraction &a);
 	    void chu(Fraction &a);
 	    void bijiao(Fraction &a);
	private:
		int top,bot;
};
Fraction::Fraction(int t,int b):top(t),bot(b){}
void Fraction::show(){
	cout<<top<<"/"<<bot<<endl;
}
void Fraction::jia(Fraction &a){
	top=a.top*bot+a.bot*top;
	bot=a.bot*bot;
}
void Fraction::jian(Fraction &a){
	top= top*a.bot-bot*a.top;
	bot=a.bot*bot;
}
void Fraction::cheng(Fraction &a){
	top=a.top*top;
	bot=a.bot*bot;
}
void Fraction::chu(Fraction &a){
	top=top*a.bot;
	bot=bot*a.top;
}
void Fraction::bijiao(Fraction &a){
	int i=top*a.bot-bot*a.top;
	if(i>0)
	cout<<top<<"/"<<bot<<">"<<a.top<<"/"<<a.bot;
	if(i==0)
	cout<<top<<"/"<<bot<<"="<<a.top<<"/"<<a.bot;
	if(i<0)
	cout<<top<<"/"<<bot<<"<"<<a.top<<"/"<<a.bot;
}
int main(){
	Fraction a;
	a.show();
	Fraction b(3,4);
	b.show();
	Fraction c(5);
	c.show();
	return 0;
}