实验结论

实验内容1

源码

main.cpp

#include
    
     #include"chip.h"using namespace std;int main(){    int m,n;    cout<<"输入两个数m，n"<
     
      >m>>n;    Basic base(m,n);    A a(m,n);    B b(m,n);    C c(m,n);    base.add() ;    a.add() ;    a.sub() ;    b.add() ;    b.mul() ;    c.add() ;    c.div() ;    return 0;}
     
    

chip.h

#include
    
     using namespace std;class Basic {public:    Basic(int m0,int n0):m(m0),n(n0) {}    int add() { cout << "m + n = " << m + n << endl; }    int m, n;};class A : public Basic {public:    A(int m0, int n0) : Basic(m0,n0) {}    int sub() { cout << "m - n = " << m - n << endl; }};class B : public Basic {public:    B(int m0, int n0) : Basic(m0,n0) {}    int mul() { cout << "m * n = " << m * n << endl; }};class C : public Basic {public:    C(int m0, int n0) : Basic(m0,n0) {}    double div() { cout << "m / n = " << double(m) / n << endl; }};
    

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实验内容2

源码

main.cpp

#include
    
     #include"vehicle.h" using namespace std;int main(){    Motorcycle mc(1,2,3,4);    mc.run() ;    mc.stop() ;    return 0;}
    

vehicle.h

#include
    
     using namespace std;class Vehicle{    public:        Vehicle(int m,int w):maxspeed(m),weight(w){}        int maxspeed,weight;        void run(){cout<<"run"<
    

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实验内容3

源码

main.cpp

#include
    
     #include"fraction.h"using namespace std;int main(){    Fraction p1(3,5),p2(4,7),p3;    p3=p1+p2;    cout<
     
      <
     
    

fraction.h

#include
    
     using namespace std;class Fraction{    public:        Fraction(){        }        Fraction(int t0,int b0);        friend Fraction operator+(const Fraction &p1,const Fraction &p2);        friend Fraction operator-(const Fraction &p1,const Fraction &p2);        friend Fraction operator*(const Fraction &p1,const Fraction &p2);        friend Fraction operator/(const Fraction &p1,const Fraction &p2);        friend ostream& operator<<(ostream &out,const Fraction &p);        int top;        int bottom;};class iFraction:public Fraction{    public:        iFraction(){        }        iFraction(int t0,int b0);        void show();};
    

fraction.cpp

#include"fraction.h"#include
    
     #include
     
      using namespace std;int gys(int x,int y)//求最大公约数 {    int m=1,a=x,b=y;    for(;m!=0;)    {        m=a%b;a=b;b=m;    }    return a;}//Fraction类的实现int m;//m为分子分母最大公约数 int bottom,top;Fraction::Fraction(int t0,int b0):top(t0),bottom(b0){}//构造函数重载Fraction operator+(const Fraction &p1,const Fraction &p2){    bottom=p1.bottom*p2.bottom;    top=p1.top*p2.bottom+p1.bottom*p2.top;    m=gys(fabs(top),fabs(bottom));    top/=m,bottom/=m;    return(Fraction(top,bottom));  }Fraction operator-(const Fraction &p1,const Fraction &p2){    bottom=p1.bottom*p2.bottom;    top=p1.top*p2.bottom-p1.bottom*p2.top;    m=gys(fabs(top),fabs(bottom));    top/=m,bottom/=m;      return(Fraction(top,bottom));}Fraction operator*(const Fraction &p1,const Fraction &p2){     top=p1.top*p2.top,bottom=p1.bottom*p2.bottom;    m=gys(fabs(top),fabs(bottom));    top/=m,bottom/=m;    return(Fraction(top,bottom));}Fraction operator/(const Fraction &p1,const Fraction &p2){    top=p1.top*p2.bottom,bottom=p1.bottom*p2.top;    m=gys(fabs(top),fabs(bottom));    top/=m,bottom/=m;      return(Fraction(top,bottom));}ostream& operator<<(ostream &out,const Fraction &p){    out<
      
       <<"/"<
      
     
    

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实验总结与体会

基本掌握了运算符重载，同时了解到友元函数不属于类的成员，不能被继承