task 1:
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();
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 }
task1.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 }
task1运行测试结果截图:
问题1：
缺少fun函数的定义。
问题2：
普通构造函数:
复制构造函数:用于通过一个已存在的对象来创建一个新对象。
移动构造函数:用于通过一个临时对象来创建一个新对象。
析构函数:释放内存。
问题3：
不能。
task2:
Complex.h:
1 #pragma once
2 #include<vector>
3 #include<string>
4 #include <iostream>
5
6 class Complex{
7 public:
8 Complex (double a=0,double b=0);
9 Complex (const Complex &other);
10 add(const Complex &other);
11 private:
12 double real;
13 double imag;
14 public:
15 static const std::string doc;
16 double get_real() const;
17 double get_imag() const;
18 friend bool is_equal(const Complex c1,const Complex c2);
19 friend bool is_not_equal(const Complex c1,const Complex c2);
20 friend Complex add(const Complex &c1,const Complex &c2);
21 friend void output(const Complex &c);
22 friend double abs(const Complex c);
23 ~Complex();
24 };
Complex.cpp:
1 #include "Complex.h"
2 #include<cmath>
3 #include <iostream>
4 #include<string>
5 using std::cout;
6 using std::endl;
7 using std::boolalpha;
8
9 Complex::Complex(double a,double b):real{a},imag{b} {}
10
11 Complex::Complex(const Complex &other)
12 {
13 real=other.real;imag=other.imag;
14 }
15
16 const std::string Complex::doc{"a simplified complex class"};
17
18 double Complex::get_real() const{return real;}
19
20 double Complex::get_imag() const{return imag;}
21
22 bool is_equal(const Complex c1,const Complex c2)
23 {
24 if(c1.real==c2.real&&c1.imag==c2.imag)
25 return true;
26 else
27 return false;
28 }
29
30 bool is_not_equal(const Complex c1,const Complex c2)
31 {
32 if(c1.real!=c2.real||c1.imag!=c2.imag)
33 return true;
34 else
35 return false;
36 }
37
38 Complex::add(const Complex &other)
39 {
40 real=other.real+real;
41 imag=other.imag+imag;
42 }
43
44 Complex add(const Complex &c1,const Complex &c2)
45 {
46 Complex sum(0,0);
47 sum.real=c1.real+c2.real;
48 sum.imag=c1.imag+c2.imag;
49 return sum;
50 }
51 void output(const Complex &c)
52 {
53 cout<<c.real<<"+"<<c.imag<<"i"<<endl;
54 }
55
56 double abs(const Complex c)
57 {
58 double h;
59 h=sqrt(c.real*c.real+c.imag*c.imag);
60 return h;
61 }
62
63 Complex::~Complex() {}
task2.cpp:
1 #include "Complex.h"
2 #include <iostream>
3 #include <cmath>
4
5 using std::cout;
6 using std::endl;
7 using std::boolalpha;
8
9 void test() {
10 cout << "类成员测试: " << endl;
11 cout << Complex::doc << endl;
12
13 cout << endl;
14
15 cout << "Complex对象测试: " << endl;
16 Complex c1;
17 Complex c2(3, -4);
18 const Complex c3(3.5);
19 Complex c4(c3);
20
21 cout << "c1 = "; output(c1); cout << endl;
22 cout << "c2 = "; output(c2); cout << endl;
23 cout << "c3 = "; output(c3); cout << endl;
24 cout << "c4 = "; output(c4); cout << endl;
25 cout << "c4.real = " << c4.get_real() << ", c4.imag = " << c4.get_imag() << endl;
26
27 cout << endl;
28
29 cout << "复数运算测试: " << endl;
30 cout << "abs(c2) = " << abs(c2) << endl;
31 c1.add(c2);
32 cout << "c1 += c2, c1 = "; output(c1); cout << endl;
33 cout << boolalpha;
34 cout << "c1 == c2 : " << is_equal(c1, c2) << endl;
35 cout << "c1 != c3 : " << is_not_equal(c1, c3) << endl;
36 c4 = add(c2, c3);
37 cout << "c4 = c2 + c3, c4 = "; output(c4); cout << endl;
38 }
39
40 int main(){
41 test();
42 }
task2运行测试结果截图:
task3:
1 #include <iostream>
2 #include <complex>
3 using std::cout;
4 using std::endl;
5 using std::boolalpha;
6 using std::complex;
7 void test() {
8 cout << "标准库模板类comple测试: " << endl;
9 complex<double> c1;
10 complex<double> c2(3, -4);
11 const complex<double> c3(3.5);
12 complex<double> c4(c3);
13 cout << "c1 = " << c1 << endl;
14 cout << "c2 = " << c2 << endl;
15 cout << "c3 = " << c3 << endl;
16 cout << "c4 = " << c4 << endl;
17 cout << "c4.real = " << c4.real() << ", c4.imag = " << c4.imag() <<
18 endl;
19 cout << endl;
20 cout << "复数运算测试: " << endl;
21 cout << "abs(c2) = " << abs(c2) << endl;
22 c1 += c2;
23 cout << "c1 += c2, c1 = " << c1 << endl;
24 cout << boolalpha;
25 cout << "c1 == c2 : " << (c1 == c2) << endl;
26 cout << "c1 != c3 : " << (c1 != c3) << endl;
27 c4 = c2 + c3;
28 cout << "c4 = c2 + c3, c4 = " << c4 << endl;
29 }
30 int main() {
31 test();
32 }
task3运行测试结果截图:
task4:
Fraction.h
1 #pragma once
2 #include <iostream>
3 #include <string>
4 #include <cstdlib>
5
6 using namespace std;
7
8 class Fraction{
9 public:
10 Fraction();
11 Fraction(int u);
12 Fraction(int u,int d);
13 Fraction(const Fraction &f);
14
15 static const string doc;
16
17 private:
18 int up,down;
19
20 public:
21 int get_up() const;
22 int get_down() const;
23 Fraction negative();
24
25 friend void output(Fraction f);
26 friend Fraction add(Fraction f1,Fraction f2);
27 friend Fraction sub(Fraction f1,Fraction f2);
28 friend Fraction mul(Fraction f1,Fraction f2);
29 friend Fraction div(Fraction f1,Fraction f2);
30 };
Fraction.cpp:
1 #include "Fraction.h"
2
3 using namespace std;
4
5 Fraction::Fraction() {
6 up=1;
7 down=1;
8 }
9
10 Fraction::Fraction(int u) {
11 up=u;
12 down=1;
13 }
14
15 Fraction::Fraction(int u,int d) {
16 up=u;
17 down=d;
18 }
19
20 Fraction::Fraction(const Fraction &f) {
21 up=f.up;
22 down=f.down;
23 }
24
25 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"};
26
27 int Fraction::get_up() const {
28
29 if(!up && down)
30 return 0;
31 else if(down){
32 int up1=up,down1=down;
33 int r=up1%down1;
34 while(r){
35 up1=down1;
36 down1=r;
37 r=up1%down1;
38 }
39 r=down1;
40 up1=up/r;
41 return up1;
42 }
43 }
44 int Fraction::get_down() const {
45 if(down){
46 int up1=up,down1=down;
47 int r=up1%down1;
48 while(r){
49 up1=down1;
50 down1=r;
51 r=up1%down1;
52 }
53 r=down1;
54 down1=down/r;
55 return down1;
56 }
57 else{
58 cout<<"分母不能为0";
59 return 0;
60 }
61 }
62 Fraction Fraction::negative() {
63 Fraction f0;
64 f0.up=-up;
65 f0.down=down;
66 return f0;
67 }
68
69 void output(Fraction f){
70 int up1=f.get_up(),down1=f.get_down();
71 if(!up1 && down1)
72 cout<<0;
73 else if(down1){
74 int flag=1;
75 if(up1*down1<0)
76 flag=-1;
77
78 up1=abs(up1);
79 down1=abs(down1);
80 cout<<flag*up1<<'/'<<down1;
81 }
82
83 }
84
85 Fraction add(Fraction f1,Fraction f2){
86 Fraction f0;
87 int up1=f1.up,down1=f1.down,up2=f2.up,down2=f2.down;
88
89 int flag1=1,flag2=1;
90 if(up1*down1<0)
91 flag1=-1;
92 if(up2*down2<0)
93 flag2=-1;
94
95 up1=abs(up1);
96 up2=abs(up2);
97 down1=abs(down1);
98 down2=abs(down2);
99
100 int down_m;
101 int r=down1%down2;
102 while(r){
103 down1=down2;
104 down2=r;
105 r=down1%down2;
106 }
107 r=down2;
108
109 down1=abs(f1.down);
110 down2=abs(f2.down);
111
112 down_m=down1*down2/r;
113 up1*=down_m/down1;
114 up2*=down_m/down2;
115
116 f0.up=flag1*up1+flag2*up2;
117 f0.down=down_m;
118 return f0;
119 }
120
121 Fraction sub(Fraction f1,Fraction f2){
122 Fraction f0=add(f1,f2.negative());
123 return f0;
124 }
125
126
127 Fraction mul(Fraction f1,Fraction f2){
128 Fraction f0;
129 f0.up=f1.up*f2.up;
130 f0.down=f1.down*f2.down;
131 return f0;
132 }
133
134 Fraction div(Fraction f1,Fraction f2){
135 Fraction f0;
136 f0.up=f1.up*f2.down;
137 f0.down=f1.down*f2.up;
138 return f0;
139 }
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 }
task4运行测试结果截图:
task5:
5.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 int lastDate;
10 double accumulation;
11
12 static double total;
13
14 void record(int data, double amount);
15 double accumulate(int date) const {
16 return accumulation + balance * (date - lastDate);
17 }
18
19 public:
20 SavingAccount(int date, int id, double rate);
21 int getId() const { return id; }
22 double getBalance() const { return balance; }
23 double getRate() const { return rate; }
24
25 static double getTotal() { return total; }
26
27 void deposit(int date, double amount);
28 void withdraw(int date, double amount);
29
30 void settle(int date);
31
32 void show() const;
33 };
5.cpp:
1 #include "5.h"
2 #include <cmath>
3 #include <iostream>
4 using namespace std;
5
6 double SavingAccount::total = 0;
7
8 SavingAccount::SavingAccount(int date, int id, double rate)
9 : id{ id }, balance{ 0 }, rate{ rate }, lastDate{ date }, accumulation{ 0 } {
10 cout << date << "\t#" << id << "is created" << endl;
11 }
12
13 void SavingAccount::record(int date, double amount) {
14 accumulation = accumulate(date);
15 lastDate = date;
16 amount = floor(amount * 100 + 0.5) / 100;
17 balance += amount;
18 total += amount;
19 cout << date << "\t#" << id << "\t" << amount << "\t" << balance << endl;
20 }
21
22 void SavingAccount::deposit(int date, double amount) {
23 record(date, amount);
24 }
25
26 void SavingAccount::withdraw(int date, double amount) {
27 if (amount > getBalance())
28 cout << "Error: not enough money" << endl;
29 else
30 record(date, -amount);
31 }
32
33 void SavingAccount::settle(int date) {
34 double interest = accumulate(date) * rate / 365;
35 if (interest != 0)
36 record(date, interest);
37 accumulation = 0;
38 }
39
40 void SavingAccount::show() const {
41 cout << "#" << id << "\tBalance: " << balance;
42 }
task5.cpp:
1 #include "5.h"
2 #include <iostream>
3 using namespace std;
4
5 int main() {
6 SavingAccount sa0(1, 21325302, 0.015);
7 SavingAccount sa1(1, 58320212, 0.015);
8
9 sa0.deposit(5, 5000);
10 sa1.deposit(25, 10000);
11 sa0.deposit(45, 5500);
12 sa1.deposit(60, 4000);
13
14 sa0.settle(90);
15 sa1.settle(90);
16
17 sa0.show(); cout << endl;
18 sa1.show(); cout << endl;
19 cout << "Total: " << SavingAccount::getTotal() << endl;
20 }
task5运行测试结果截图:
标签：const,对象,double,编程,int,Complex,实验,Fraction,include From： https://www.cnblogs.com/pic-riy/p/18496526