实验2

实验任务1

t.h

#pragma once
#include<string>

class T{
public:
    T(int x=0,int y=0);
    T(const T &t);
    T(T &&t);
    ~T();
    
    void adjust(int radio);
    void display() const;

private:
    int m1,m2;

public:
    static int get_cnt();

public:
    static const std::string doc;
    static const int max_cnt;

private:
    static int cnt;
    
    friend void func();
};

void func();

t.cpp

#include "t.h"
#include <string>
#include <iostream>
using namespace std;

const string T::doc{"a simple calss sample"};
const int T::max_cnt=999;
int T::cnt=0;

T::T(int x,int y):m1{x},m2{y}{
    ++cnt;
    cout<<"T constructor called.\n";
} 

T::T(const T &t):m1{t.m1},m2{t.m2}
{
    ++cnt;
    cout<<"T copy constructor called.\n";
}

T::T(T &&t):m1{t.m1},m2{t.m2}{
    ++cnt;
    cout<<"T move constructor called.\n";
}

T::~T()
{
    --cnt;
    cout<<"T destructor called.\n";
}

void T::adjust(int ratio)
{
    m1*=ratio;
    m2*=ratio;
}

void T::display()const
{
    cout<<"("<<m1<<","<<m2<<")";
}

int T::get_cnt()
{
    return cnt;
}

void func()
{
    T t5(42);
    t5.m2=2049;
    cout<<"t5=";
    t5.display();
    cout<<endl;
}

main.cpp

#include "t.h"
#include <iostream>

using namespace std;

void test();

int main()
{
    test();
    cout<<"\nmain:\n";
    cout<<"T objects`current count:"<<T::get_cnt()<<endl;
}

void test()
{
    cout<<"test class T:\n";
    cout<<"T info:"<<T::doc<<endl;
    cout<<"T object`max count:"<<T::max_cnt<<endl;
    cout<<"T object`current count:"<<T::get_cnt()<<endl<<endl;
    
    T t1;
    cout<<"t1=";t1.display();cout<<endl;
    
    T t2(3,4);
    cout<<"t2=";t2.display();cout<<endl;
    
    T t3(t2);
    t3.adjust(2);
    cout<<"t3=";t3.display();cout<<endl;
    
    T t4(move(t2));
    cout<<"t3=";t4.display();cout<<endl;
    
    cout<<"T objects`current count:"<<T::get_cnt()<<endl;
    
    func();
}

实验任务2

Complex.h

class Complex{

public:
    static string doc;
    Complex(double r=0,double i=0);
    Complex(const Complex &c);
    double get_real();
    double get_imag();
    void add(Complex &c);
    friend Complex add(const Complex &c1,const Complex &c2);
    friend bool is_equal(const Complex &c1,const Complex &c2);
    friend bool is_not_equal(const Complex &c1,const Complex &c2);
    friend void output(const Complex &c1);
    friend double abs(const Complex &c1);
private:
    double real;
    double imag;
    
};

#endif

Complex.cpp

#include <bits/stdc++.h>
#include "Complex.h"
using namespace std;

string Complex::doc="a simplified complex class";
Complex::Complex(double r,double i):real{r},imag{i}{}
Complex::Complex(const Complex &c):real{c.real},imag{c.imag}{}
double Complex::get_real(){return real;}
double Complex::get_imag(){return imag;}
void Complex::add(Complex &c){
    real+=c.real;
    imag+=c.imag;
}
Complex add(const Complex &c1,const Complex &c2)
{
    Complex c3;
    c3.real=c1.real+c2.real;
    c3.imag=c1.imag+c2.imag;
    return c3;
}

bool is_equal(const Complex &c1,const Complex &c2)
{
    if(c1.real==c2.real&&c1.imag==c2.imag)
        return true;
    return false;
}

bool is_not_equal(const Complex &c1,const Complex &c2)
{
    if(c1.real==c2.real&&c1.imag==c2.imag)
        return false;
    return true;
}

void output(const Complex &c1)
{
    cout<<c1.real<<" + "<<c1.imag<<"i"<<endl;
}

double abs(const Complex &c1)
{
    return sqrt(c1.real*c1.real+c1.imag*c1.imag);
}

main.cpp

#include <iostream>
#include "Complex.h"

using std::cout;
using std::endl;
using std::boolalpha;

void test() {
    cout << "类成员测试: " << endl;
    cout << Complex::doc << endl;

    cout << endl;

    cout << "Complex对象测试: " << endl;
    Complex c1;
    Complex c2(3, -4);
    const Complex c3(3.5);
    Complex c4(c3);

    cout << "c1 = "; output(c1); cout << endl;
    cout << "c2 = "; output(c2); cout << endl;
    cout << "c3 = "; output(c3); cout << endl;
    cout << "c4 = "; output(c4); cout << endl;
    cout << "c4.real = " << c4.get_real() << ", c4.imag = " << c4.get_imag() << endl;

    cout << endl;

    cout << "复数运算测试: " << endl;
    cout << "abs(c2) = " << abs(c2) << endl;
    c1.add(c2);
    cout << "c1 += c2, c1 = "; output(c1); cout << endl;
    cout << boolalpha;
    cout << "c1 == c2 : " << is_equal(c1, c2) << endl;
    cout << "c1 != c3 : " << is_not_equal(c1, c3) << endl;
    c4 = add(c2, c3);
    cout << "c4 = c2 + c3, c4 = "; output(c4); cout << endl;
}

int main() {
    test();
}

实验任务3

#include <iostream>
#include <complex>
using namespace std;

void test()
{
    cout<<"标准库模板类complex测试:"<<endl;
    complex<double> c1;
    complex<double> c2(3,-4);
    const complex<double> c3(3.5);
    complex<double> c4(c3);
    
    cout<<"c1="<<c1<<endl;
    cout<<"c2="<<c2<<endl;
    cout<<"c3="<<c3<<endl;
    cout<<"c4="<<c4<<endl;
    cout<<"c4.real="<<c4.real()<<",c4.imag="<<c4.imag()<<endl;
    cout<<endl;
    
    cout<<"复数运算测试:"<<endl;
    cout<<"abs(c2)="<<abs(c2)<<endl;
    c1+=c2;
    cout<<"c1+=c2,c1="<<c1<<endl;
    cout<<boolalpha;
    cout<<"c1==c2:"<<(c1==c2)<<endl;
    cout<<"c1!=c3:"<<(c1!=c3)<<endl;
    c4=c2+c3;
    cout<<"c4=c2+c3,c4="<<c4<<endl;
    
 } 
 
 int main ()
 {
     test();
 }

实验任务4

Fraction.h

#pragma once
#include<string>

class Fraction{
private:
    int up;
    int down;

public:
    Fraction(int u,int d=1);
    Fraction(const Fraction &f);
    
    static const std::string doc;
    int get_up();
    int get_down();
    Fraction negative();
    friend void output(const Fraction f);
    friend Fraction add(const Fraction f1,const Fraction f2);
    friend Fraction sub(const Fraction f1,const Fraction f2);
    friend Fraction mul(const Fraction f1,const Fraction f2);
    friend Fraction div(const Fraction f1,const Fraction f2);
};
void output(const Fraction f);
Fraction add(const Fraction f1,const Fraction f2);
Fraction sub(const Fraction f1,const Fraction f2);
Fraction mul(const Fraction f1,const Fraction f2);
Fraction div(const Fraction f1,const Fraction f2);

Fraction.cpp

#include <bits/stdc++.h>
#include "Fraction.h"
using namespace std;

const string Fraction::doc="Fraction类 v 0.01版.\n目前仅支持分数对象的构造，输出，加/减/乘/除运算.\n";
Fraction::Fraction(int u,int d):up{u},down{d}{}
Fraction::Fraction(const Fraction &f):up{f.up},down{f.down}{}
int Fraction::get_up()
{
    int a,b;
    a=abs(up);b=abs(down);
    
    while (b)
    {
        int tmp=a;
        a=b;
        b=tmp%b;
    }
    return up/a;
}
int Fraction::get_down()
{
    int a,b;
    a=abs(up);b=abs(down);
    
    while (b)
    {
        int tmp=a;
        a=b;
        b=tmp%b;
    }
    return down/a;
}
Fraction Fraction::negative()
{
    int new_up=-up;
    Fraction f(new_up,down);
    return f;
}

void output(const Fraction f)
{
    if (f.down==0)
    {
        cout<<"分母不能为0";
        return ;
    }
    
    int a,b;
    a=abs(f.up);b=abs(f.down);
    
    while (b)
    {
        int tmp=a;
        a=b;
        b=tmp%b;
    }
    int new_down=f.down/a;
    if (new_down==1)
        cout<<f.up/a;
    else if (f.up*f.down>0)
        cout<<abs(f.up)/a<<"/"<<abs(f.down)/a;
    else 
        cout<<"-"<<abs(f.up)/a<<"/"<<abs(f.down)/a;
}

Fraction add(const Fraction f1,const Fraction f2)
{
    int new_down=f1.down*f2.down;
    int new_up=f1.up*f2.down+f2.up*f1.down;
    int a,b;
    a=abs(new_up);b=abs(new_down);
    while (b)
    {
        int tmp=a;
        a=b;
        b=tmp%b;
    }
    new_up/=a;new_down/=a;
    Fraction f(new_up,new_down);
    return f;
}

Fraction sub(Fraction f1,Fraction f2)
{
    int new_down=f1.down*f2.down;
    int new_up=f1.up*f2.down-f2.up*f1.down;
    int a,b;
    a=abs(new_up);b=abs(new_down);
    while (b)
    {
        int tmp=a;
        a=b;
        b=tmp%b;
    }
    new_up/=a;new_down/=a;
    Fraction f(new_up,new_down);
    return f;
}

Fraction mul(Fraction f1,Fraction f2)
{
    int new_up=f1.up*f2.up;
    int new_down=f1.down*f2.down;
    int a,b;
    a=abs(new_up);b=abs(new_down);
    while (b)
    {
        int tmp=a;
        a=b;
        b=tmp%b;
    }
    new_up/=a;new_down/=a;
    Fraction f(new_up,new_down);
    return f;
}

Fraction div(Fraction f1,Fraction f2)
{
    
    int new_up=f1.up*f2.down;
    int new_down=f1.down*f2.up;
    int a,b;
    a=abs(new_up);b=abs(new_down);
    while (b)
    {
        int tmp=a;
        a=b;
        b=tmp%b;
    }
    new_up/=a;new_down/=a;
    Fraction f(new_up,new_down);
    return f;
}

main.cpp

#include "Fraction.h"
#include <iostream>

using std::cout;
using std::endl;


void test1() {
    cout << "Fraction类测试: " << endl;
    cout << Fraction::doc << endl << endl;

    Fraction f1(5);
    Fraction f2(3, -4), f3(-18, 12);
    Fraction f4(f3);
    cout << "f1 = "; output(f1); cout << endl;
    cout << "f2 = "; output(f2); cout << endl;
    cout << "f3 = "; output(f3); cout << endl;
    cout << "f4 = "; output(f4); cout << endl;

    Fraction f5(f4.negative());
    cout << "f5 = "; output(f5); cout << endl;
    cout << "f5.get_up() = " << f5.get_up() << ", f5.get_down() = " << f5.get_down() << endl;

    cout << "f1 + f2 = "; output(add(f1, f2)); cout << endl;
    cout << "f1 - f2 = "; output(sub(f1, f2)); cout << endl;
    cout << "f1 * f2 = "; output(mul(f1, f2)); cout << endl;
    cout << "f1 / f2 = "; output(div(f1, f2)); cout << endl;
    cout << "f4 + f5 = "; output(add(f4, f5)); cout << endl;
}

void test2() {
    Fraction f6(42, 55), f7(0, 3);
    cout << "f6 = "; output(f6); cout << endl;
    cout << "f7 = "; output(f7); cout << endl;
    cout << "f6 / f7 = "; output(div(f6, f7)); cout << endl;
}

int main() {
    cout << "测试1: Fraction类基础功能测试\n";
    test1();

    cout << "\n测试2: 分母为0测试: \n";
    test2();
}

实验任务5

account.h

#ifndef __ACCOUNT_H__
#define __ACCOUNT_H__

class SavingAccount{
private:
    int id;
    double balance;
    double rate;
    double lastData;
    double accumulation;
    
    static double total;
    
    void record(int data,double amount);
    double accumulate(int data) const
    {
        return accumulation+balance*(data-lastData);
    }
public:
    SavingAccount(int data,int id,double rate);
    int getId() const {return id;}
    double getBalance() const {return balance;}
    double getRate() const {return rate;}
    static double getTotal() {return total;}
    void deposit(int data,double amount);
    void withdraw(int data,double amount);
    void settle(int data);
    void show() const;
}; 
#endif

account.cpp

#include <bits/stdc++.h>
#include "account.h"
using namespace std;

double SavingAccount::total=0;
SavingAccount::SavingAccount(int data,int id,double rate)
    :id(id),balance(0),rate(rate),lastData(data),accumulation(0)
    {
        cout<<data<<"\t#"<<id<<"is created"<<endl;
    }
    
void SavingAccount::record(int data,double amount)
{
    accumulation=accumulate(data);
    lastData=data;
    amount=floor(amount*100+0.5)/100;
    balance+=amount;
    total+=amount;
    cout<<data<<"\t#"<<id<<"\t"<<amount<<"\t"<<balance<<endl;
}

void SavingAccount::deposit(int data,double amount)
{
    record(data,amount);
}

void SavingAccount::withdraw(int data,double amount)
{
    if (amount>getBalance())
        cout<<"Error:not enough money"<<endl;
    else 
        record(data,-amount);
}

void SavingAccount::settle(int data)
{
    double interest=accumulate(data)*rate/365;
    if (interest!=0)
        record(data,interest);
    accumulation=0;
}
void SavingAccount::show() const
{
    cout<<"#"<<id<<"\tBalance:"<<balance;
}

main.cpp

#include "account.h"
#include <iostream>
using namespace std;

int main ()
{
    SavingAccount sa0(1,21325302,0.015);
    SavingAccount sa1(1,58320212,0.015);
    
    sa0.deposit(5,5000);
    sa1.deposit(25,10000);
    sa0.deposit(45,5500);
    sa1.deposit(60,4000);
    
    sa0.settle(90);
    sa1.settle(90);
    
    sa0.show();cout<<endl;
    sa1.show();cout<<endl;
    cout<<"Total:"<<SavingAccount::getTotal()<<endl;
    return 0;
}