#include 
       
        #include "graph.h"using namespace std;int main() {    Graph graph1('*',5), graph2('$',7) ;  // 定义Graph类对象graph1, graph2     graph1.draw(); // 通过对象graph1调用公共接口draw()在屏幕上绘制图形     graph2.draw(); // 通过对象graph2调用公共接口draw()在屏幕上绘制图形    graph1.setcolor('y','g');    graph1.draw();    graph2.setcolor('r','w');    graph2.draw();    return 0; }
       

// 类graph的实现 #include "graph.h" #include 
       
        #include 
        
         using namespace std;// 带参数的构造函数的实现 Graph::Graph(char ch, int n): symbol(ch), size(n) {}void Graph::draw(){    int i,j;    for(i=0;i
         
          =size-i&&j<=size+i)        cout<
         
        
       

// 类Graph的声明 class Graph {    public:        Graph(char ch, int n);   // 带有参数的构造函数         void draw();     // 绘制图形         void setcolor(char fore,char back);    private:        char symbol;        int size;        unsigned forecolor,backcolor;        int str(char a); };

#include"Fraction.h"#include
      
       #include
       
        using namespace std;int Fraction::gct(int a,int b){	return a%b==0?b:gct(b,a%b);}Fraction::Fraction():top(0),bottom(1){}Fraction::Fraction(int t):top(t),bottom(1){}Fraction::Fraction(int t,int b):top(t),bottom(b){}void Fraction::add(Fraction &p){	top=top*p.bottom+p.top*bottom;	bottom=bottom*p.bottom;	form();	op();}void Fraction::sub(Fraction &p){	top=top*p.bottom-p.top*bottom;	bottom=bottom*p.bottom;	form();	op();}void Fraction::mul(Fraction &p){	top=top*p.top;	bottom=bottom*p.bottom;	form();	op();}void Fraction::div(Fraction &p){	top=top*p.bottom;	bottom=p.top*bottom;	form();	op();}void Fraction::form(){    if(bottom<0){    	bottom*=-1;    	top*=-1;	}	int g=gct(abs(top),abs(bottom));	top/=g;	bottom/=g;}void Fraction::ip(){	cout<<"输入分子"<
        
         >top;	int bo;	cout<<"输入分母"<
         
          >bo;	while(bo==0){    cout<<"请重新输入"<
          
           >bo;	} 	bottom=bo;}void Fraction::op(){	form();	if(bottom!=1)	cout<
           
            <<"/"<
            
             <
            
           
          
         
        
       
      

　　

#include"Fraction.h"#include
      
       #include
       
        using namespace std;int main(){	Fraction a;	Fraction b(3,4);	Fraction c(5);	cout<<"输出a的初值"<
       
      

　　

class Fraction { private: int top; int bottom; int gct(int a,int b); public: Fraction(); Fraction(int t); Fraction(int t,int b); void add(Fraction &p); void sub(Fraction &p); void mul(Fraction &p); void div(Fraction &p); void for

m(); void ip(); void op(); };