实验二

任务一：

代码：

t.h:

 1 #pragma once
 2 
 3 #include <string>
 4 
 5 // 类T: 声明
 6 class T {
 7 // 对象属性、方法
 8 public:
 9     T(int x = 0, int y = 0);   // 普通构造函数
10     T(const T &t);  // 复制构造函数
11     T(T &&t);       // 移动构造函数
12     ~T();           // 析构函数
13 
14     void adjust(int ratio);      // 按系数成倍调整数据
15     void display() const;           // 以(m1, m2)形式显示T类对象信息
16 
17 private:
18     int m1, m2;
19 
20 // 类属性、方法
21 public:
22     static int get_cnt();          // 显示当前T类对象总数
23 
24 public:
25     static const std::string doc;       // 类T的描述信息
26     static const int max_cnt;           // 类T对象上限
27 
28 private:
29     static int cnt;         // 当前T类对象数目
30 
31 // 类T友元函数声明
32     friend void func();
33 };
34 
35 // 普通函数声明
36 void func();
View Code

t.cpp:

 1 // 类T: 实现
 2 // 普通函数实现
 3 
 4 #include "t.h"
 5 #include <iostream>
 6 #include <string>
 7 
 8 using std::cout;
 9 using std::endl;
10 using std::string;
11 
12 // static成员数据类外初始化
13 const std::string T::doc{"a simple class sample"};
14 const int T::max_cnt = 999;
15 int T::cnt = 0;
16 
17 
18 // 对象方法
19 T::T(int x, int y): m1{x}, m2{y} { 
20     ++cnt; 
21     cout << "T constructor called.\n";
22 } 
23 
24 T::T(const T &t): m1{t.m1}, m2{t.m2} {
25     ++cnt;
26     cout << "T copy constructor called.\n";
27 }
28 
29 T::T(T &&t): m1{t.m1}, m2{t.m2} {
30     ++cnt;
31     cout << "T move constructor called.\n";
32 }    
33 
34 T::~T() {
35     --cnt;
36     cout << "T destructor called.\n";
37 }           
38 
39 void T::adjust(int ratio) {
40     m1 *= ratio;
41     m2 *= ratio;
42 }    
43 
44 void T::display() const {
45     cout << "(" << m1 << ", " << m2 << ")" ;
46 }     
47 
48 // 类方法
49 int T::get_cnt() {
50    return cnt;
51 }
52 
53 // 友元
54 void func() {
55     T t5(42);
56     t5.m2 = 2049;
57     cout << "t5 = "; t5.display(); cout << endl;
58 }
View Code

c.cpp:

 1 #include "t.h"
 2 #include <iostream>
 3 
 4 using std::cout;
 5 using std::endl;
 6 
 7 void test();
 8 
 9 int main() {
10     test();
11     cout << "\nmain: \n";
12     cout << "T objects'current count: " << T::get_cnt() << endl;
13 }
14 
15 void test() {
16     cout << "test class T: \n";
17     cout << "T info: " << T::doc << endl;
18     cout << "T objects'max count: " << T::max_cnt << endl;
19     cout << "T objects'current count: " << T::get_cnt() << endl << endl;
20 
21 
22     T t1;
23     cout << "t1 = "; t1.display(); cout << endl;
24 
25     T t2(3, 4);
26     cout << "t2 = "; t2.display(); cout << endl;
27 
28     T t3(t2);
29     t3.adjust(2);
30     cout << "t3 = "; t3.display(); cout << endl;
31 
32     T t4(std::move(t2));
33     cout << "t3 = "; t4.display(); cout << endl;
34 
35     cout << "T objects'current count: " << T::get_cnt() << endl;
36 
37     func();
38 }
View Code

截图：

 

 可能是函数形式的问题；

 不可以运行。

 

task2

代码：

Complex.h:

#pragma once
#include<string>

class Complex{
    public:
        static  const std::string doc;
        Complex(double r=0,double i=0);
        Complex(const Complex &c);
        const double get_real();
        const double get_imag();
        Complex add(const 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 double abs(const Complex &c);
        friend void output(const Complex &c);
    private:
        
        double real;
        double imag;
};
View Code

Complex.cpp:

 1 #include "Complex.h"
 2 #include<cmath>
 3 #include<string>
 4 #include<iostream>
 5 
 6 using namespace std;
 7 
 8 const string Complex::doc{"a simplified Complex class"};
 9 
10 Complex::Complex(double r,double i):real{r},imag{i}{}
11 
12 Complex::Complex(const Complex &c):real{c.real},imag{c.imag}{}
13 
14 const double Complex::get_real(){
15     return real;
16 }
17 
18 const double Complex::get_imag(){
19     return imag;
20 }
21 
22 Complex Complex::add(const Complex &c){
23     Complex x;
24     x.real=x.real+c.real;
25     x.imag=x.imag+c.imag;
26     return x;
27 }
28 
29 Complex add(const Complex &c1,const Complex &c2){
30     return Complex(c1.real+c2.real,c1.imag+c2.imag);
31 }
32 
33 bool is_equal(const Complex &c1,const Complex &c2){
34     if(c1.real==c2.real&&c1.imag==c2.imag){
35         return true;
36     }
37 }
38 
39 bool is_not_equal(const Complex &c1,const Complex &c2){
40     if(c1.real==c2.real&&c1.imag==c2.imag){
41         return false;
42     }
43 }
44 
45 double abs(const Complex &c){
46     return sqrt(c.real*c.real+c.imag*c.imag);
47 }
48 
49 void output(const Complex &c){
50     cout<<c.real<<"+"<<c.imag<<"i"<<endl;
51 }
View Code

task2.cpp:

 1 #include "Complex.h"
 2 #include <iostream>
 3 
 4 using std::cout;
 5 using std::endl;
 6 using std::boolalpha;
 7 
 8 void test() {
 9     cout << "类成员测试: " << endl;
10     cout << Complex::doc << endl;
11 
12     cout << endl;
13 
14     cout << "Complex对象测试: " << endl;
15     Complex c1;
16     Complex c2(3, -4);
17     const Complex c3(3.5);
18     Complex c4(c3);
19 
20     cout << "c1 = "; output(c1); cout << endl;
21     cout << "c2 = "; output(c2); cout << endl;
22     cout << "c3 = "; output(c3); cout << endl;
23     cout << "c4 = "; output(c4); cout << endl;
24     cout << "c4.real = " << c4.get_real() << ", c4.imag = " << c4.get_imag() << endl;
25 
26     cout << endl;
27 
28     cout << "复数运算测试: " << endl;
29     cout << "abs(c2) = " << abs(c2) << endl;
30     c1.add(c2);
31     cout << "c1 += c2, c1 = "; output(c1); cout << endl;
32     cout << boolalpha;
33     cout << "c1 == c2 : " << is_equal(c1, c2) << endl;
34     cout << "c1 != c3 : " << is_not_equal(c1, c3) << endl;
35     c4 = add(c2, c3);
36     cout << "c4 = c2 + c3, c4 = "; output(c4); cout << endl;
37 }
38 
39 int main() {
40     test();
41 }
View Code

截图：

 task3

代码：

 1 #include <iostream>
 2 #include <complex>
 3 
 4 using std::cout;
 5 using std::endl;
 6 using std::boolalpha;
 7 using std::complex;
 8 
 9 void test() {
10     cout << "标准库模板类comple测试: " << endl;
11     complex<double> c1;
12     complex<double> c2(3, -4);
13     const complex<double> c3(3.5);
14     complex<double> c4(c3);
15 
16     cout << "c1 = " << c1 << endl;
17     cout << "c2 = " << c2 << endl;
18     cout << "c3 = " << c3 << endl;
19     cout << "c4 = " << c4 << endl;
20     cout << "c4.real = " << c4.real() << ", c4.imag = " << c4.imag() << endl;
21     cout << endl;
22 
23     cout << "复数运算测试: " << endl;
24     cout << "abs(c2) = " << abs(c2) << endl;
25     c1 += c2;
26     cout << "c1 += c2, c1 = " << c1 << endl;
27     cout << boolalpha;
28     cout << "c1 == c2 : " << (c1 == c2) << endl;
29     cout << "c1 != c3 : " << (c1 != c3) << endl;
30     c4 = c2 + c3;
31     cout << "c4 = c2 + c3, c4 = " << c4 << endl;
32 }
33 
34 int main() {
35     test();
36 }
View Code

 

截图：

在库中提供了输出函数，可直接输出复数形式。

task4

代码：

Fraction.h:

 1 #pragma once
 2 #include<string>
 3 using namespace std;
 4 class Fraction{
 5     public:
 6         static const string doc;
 7     public:
 8         Fraction(int x,int y=1);
 9         Fraction(const Fraction &f);
10         const int get_up();
11         const int get_down();
12         Fraction negative();
13     public:
14         friend void output(const Fraction &f);
15         friend Fraction add(Fraction f1,Fraction f2);
16         friend Fraction sub(Fraction f1,Fraction f2);
17         friend Fraction mul(Fraction f1,Fraction f2);
18         friend Fraction div(Fraction f1,Fraction f2);
19     private:
20         int up;
21         int down;
22 };
View Code

Fraction.cpp:

 1 #include<iostream>
 2 #include"Fraction.h"
 3 #include<string>
 4 #include<cmath> 
 5 
 6 using namespace std;
 7 
 8 int max(int x,int y){
 9     int a=abs(x);
10     int b=abs(y);
11     while (b)
12     {
13         int tmp=a;
14         a=b;
15         b=tmp%b;
16     }
17     return a;
18 }
19 
20 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";
21 Fraction::Fraction(int x,int y):up{x},down{y}{}
22 
23 Fraction::Fraction(const Fraction &f):up{f.up},down{f.down}{}
24 
25 const int Fraction::get_up(){
26     return up/max(up,down);
27 }
28 
29 const int Fraction::get_down(){
30     return down/max(up,down);
31 }
32 
33 Fraction Fraction::negative(){
34     int new_up=-up;
35     Fraction f(new_up,down);
36     return f;
37 }
38 
39 void output(const Fraction &f){
40     if (f.down==0)
41     {
42         cout<<"分母不能为0";
43         return ;
44     }
45     int new_down=f.down/max(f.up,f.down);
46     if (new_down==1)
47         cout<<f.up/max(f.up,f.down);
48     else if (f.up*f.down>0)
49         cout<<abs(f.up)/max(f.up,f.down)<<"/"<<abs(f.down)/max(f.up,f.down);
50     else 
51         cout<<"-"<<abs(f.up)/max(f.up,f.down)<<"/"<<abs(f.down)/max(f.up,f.down);
52 }
53 
54 Fraction add(const Fraction f1,const Fraction f2)
55 {
56     int new_down=f1.down*f2.down;
57     int new_up=f1.up*f2.down+f2.up*f1.down;
58     new_up/=max(new_up,new_down);new_down/=max(new_up,new_down);
59     Fraction f(new_up,new_down);
60     return f;
61 }
62 
63 Fraction sub(Fraction f1,Fraction f2)
64 {
65     int new_down=f1.down*f2.down;
66     int new_up=f1.up*f2.down-f2.up*f1.down;
67     new_up/=max(new_up,new_down);new_down/=max(new_up,new_down);
68     Fraction f(new_up,new_down);
69     return f;
70 }
71 
72 Fraction mul(Fraction f1,Fraction f2)
73 {
74     int new_up=f1.up*f2.up;
75     int new_down=f1.down*f2.down;
76     new_up/=max(new_up,new_down);new_down/=max(new_up,new_down);
77     Fraction f(new_up,new_down);
78     return f;
79 }
80 
81 Fraction div(Fraction f1,Fraction f2)
82 {
83     
84     int new_up=f1.up*f2.down;
85     int new_down=f1.down*f2.up;
86     new_up/=max(new_up,new_down);new_down/=max(new_up,new_down);
87     Fraction f(new_up,new_down);
88     return f;
89 }
View Code

task4.cpp:

 1 #include "Fraction.h"
 2 #include <iostream>
 3 
 4 using std::cout;
 5 using std::endl;
 6 
 7 
 8 void test1() {
 9     cout << "Fraction类测试: " << endl;
10     cout << Fraction::doc << endl << endl;
11 
12     Fraction f1(5);
13     Fraction f2(3, -4), f3(-18, 12);
14     Fraction f4(f3);
15     cout << "f1 = "; output(f1); cout << endl;
16     cout << "f2 = "; output(f2); cout << endl;
17     cout << "f3 = "; output(f3); cout << endl;
18     cout << "f4 = "; output(f4); cout << endl;
19 
20     Fraction f5(f4.negative());
21     cout << "f5 = "; output(f5); cout << endl;
22     cout << "f5.get_up() = " << f5.get_up() << ", f5.get_down() = " << f5.get_down() << endl;
23 
24     cout << "f1 + f2 = "; output(add(f1, f2)); cout << endl;
25     cout << "f1 - f2 = "; output(sub(f1, f2)); cout << endl;
26     cout << "f1 * f2 = "; output(mul(f1, f2)); cout << endl;
27     cout << "f1 / f2 = "; output(div(f1, f2)); cout << endl;
28     cout << "f4 + f5 = "; output(add(f4, f5)); cout << endl;
29 }
30 
31 void test2() {
32     Fraction f6(42, 55), f7(0, 3);
33     cout << "f6 = "; output(f6); cout << endl;
34     cout << "f7 = "; output(f7); cout << endl;
35     cout << "f6 / f7 = "; output(div(f6, f7)); cout << endl;
36 }
37 
38 int main() {
39     cout << "测试1: Fraction类基础功能测试\n";
40     test1();
41 
42     cout << "\n测试2: 分母为0测试: \n";
43     test2();
44 }
View Code

 

截图：

 task5

代码：

account.h:

 1 #ifndef __ACCOUNT_H__
 2 #define __ACCOUNT_H__
 3 
 4 class SavingAccount{
 5 private:
 6     int id;
 7     double balance;
 8     double rate;
 9     double lastData;
10     double accumulation;
11     
12     static double total;
13     
14     void record(int data,double amount);
15     double accumulate(int data) const
16     {
17         return accumulation+balance*(data-lastData);
18     }
19 public:
20     SavingAccount(int data,int id,double rate);
21     int getId() const {return id;}
22     double getBalance() const {return balance;}
23     double getRate() const {return rate;}
24     static double getTotal() {return total;}
25     void deposit(int data,double amount);
26     void withdraw(int data,double amount);
27     void settle(int data);
28     void show() const;
29 }; 
30 #endif
View Code

account.cpp:

 1 #include <bits/stdc++.h>
 2 #include "account.h"
 3 using namespace std;
 4 
 5 double SavingAccount::total=0;
 6 SavingAccount::SavingAccount(int data,int id,double rate)
 7     :id(id),balance(0),rate(rate),lastData(data),accumulation(0)
 8     {
 9         cout<<data<<"\t#"<<id<<"is created"<<endl;
10     }
11     
12 void SavingAccount::record(int data,double amount)
13 {
14     accumulation=accumulate(data);
15     lastData=data;
16     amount=floor(amount*100+0.5)/100;
17     balance+=amount;
18     total+=amount;
19     cout<<data<<"\t#"<<id<<"\t"<<amount<<"\t"<<balance<<endl;
20 }
21 
22 void SavingAccount::deposit(int data,double amount)
23 {
24     record(data,amount);
25 }
26 
27 void SavingAccount::withdraw(int data,double amount)
28 {
29     if (amount>getBalance())
30         cout<<"Error:not enough money"<<endl;
31     else 
32         record(data,-amount);
33 }
34 
35 void SavingAccount::settle(int data)
36 {
37     double interest=accumulate(data)*rate/365;
38     if (interest!=0)
39         record(data,interest);
40     accumulation=0;
41 }
42 void SavingAccount::show() const
43 {
44     cout<<"#"<<id<<"\tBalance:"<<balance;
45 }
View Code

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;
}

截图：

 

posted @ 2024-10-23 14:34  萨乐芬妮  阅读(16)  评论(0)  编辑  收藏  举报