实验任务一
源代码
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();
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 }
task.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 }
运行结果截图
问题1.报错截图
，因为t.h中仅仅只声明了func是类T的友元函数，并没有给出定义，所以会报错
2.普通构造函数构造一个新的对象，复制构造函数将一个对象复制到另一个新对象中，移动构造函数将一个对象移动到一个新对象中。在主函数结束时，依次调用析构函数
3.会编译报错，static的数据在类中声明，需要在类外（也就是t.cpp中）定义
实验任务二
源代码
x.h
1 #ifndef X_H
2 #define X_H
3 #include<string>
4 using std::string;
5
6 class Complex {
7
8 public:
9
10 Complex(double real0 = 0, double imag0 = 0);
11 Complex(const Complex& obj);
12 ~Complex();
13
14 double get_real() const;
15 double get_imag() const;
16 void add(Complex c);
17 friend Complex add(const Complex a, const Complex b);
18 friend bool is_equal(Complex a, Complex b);
19 friend bool is_not_equal(Complex a, Complex b);
20 friend void output(Complex c);
21 friend double abs(Complex c);
22
23 private:
24
25 double real;
26 double imag;
27
28 public:
29 static const string doc;
30
31 };
32
33 #endif
x.cpp
1 #include<iostream>
2 #include<string>
3 #include "x.h"
4
5 using std::cout;
6 using std::endl;
7 using std::string;
8
9 const string Complex::doc{ "a simple class demo" };
10 Complex::Complex(double real0 , double imag0 ) {
11 real = real0;
12 imag = imag0;
13 };
14
15 Complex::~Complex() {};
16 Complex::Complex(const Complex& obj) {
17 real = obj.real;
18 imag = obj.imag;
19 }
20
21 double Complex::get_real() const { return real; }
22 double Complex::get_imag() const { return imag; }
23 void Complex::add(Complex c) {
24 real += c.real;
25 imag += c.imag;
26 }
27 Complex add(Complex a, Complex b) {
28 Complex c;
29 c.real=a.real + b.real;
30 c.imag =a.imag + b.imag;
31 return c;
32 }
33 bool is_equal(Complex a, Complex b) {
34 if (a.real == b.real && a.imag == b.imag)
35 return true;
36 else
37 return false;
38 }
39 bool is_not_equal(Complex a, Complex b) {
40 if (a.real == b.real && a.imag == b.imag)
41 return false;
42 else
43 return true;
44 }
45 void output(Complex c) {
46 if(c.imag >=0)
47 cout << c.real << " + " << c.imag << "i" << endl;
48 else
49 cout << c.real << " - " << abs(c.imag) << "i" << endl;
50 }
51 double abs(Complex c) {
52 return sqrt(c.real * c.real + c.imag * c.imag);
53 }
main.cpp
1 #include <iostream>
2 #include "x.h"
3
4 using std::cout;
5 using std::endl;
6 using std::boolalpha;
7
8 void test() {
9
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
20 Complex c4(c3);
21
22
23
24 cout << "c1 = "; output(c1); cout << endl;
25 cout << "c2 = "; output(c2); cout << endl;
26 cout << "c3 = "; output(c3); cout << endl;
27 cout << "c4 = "; output(c4); cout << endl;
28 cout << "c4.real = " << c4.get_real() << ", c4.imag = " << c4.get_imag() << endl;
29
30 cout << endl;
31
32 cout << "复数运算测试: " << endl;
33 cout << "abs(c2) = " << abs(c2) << endl;
34 c1.add(c2);
35 cout << "c1 += c2, c1 = "; output(c1); cout << endl;
36 cout << boolalpha;
37 cout << "c1 == c2 : " << is_equal(c1, c2) << endl;
38 cout << "c1 != c3 : " << is_not_equal(c1, c3) << endl;
39 c4 = add(c2, c3);
40 cout << "c4 = c2 + c3, c4 = "; output(c4); cout << endl;
41
42 }
43
44
45
46 int main() {
47
48 test();
49
50 }
运行结果截图
实验任务三
源代码
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 }
运行结果截图
实验任务四
源代码
Fraction.h
1 #pragma once
2 #include<iostream>
3 #include<string>
4 using std::string;
5
6 class Fraction {
7 public:
8 Fraction(int up0 = 0, int down0 = 1);
9 Fraction(const Fraction& obj);
10 ~Fraction() {};
11
12 int get_up () const;
13 int get_down () const;
14 Fraction negative();
15
16 friend void output(Fraction f);
17 friend Fraction add(Fraction f1, Fraction f2);
18 friend Fraction sub(Fraction f1, Fraction f2);
19 friend Fraction mul(Fraction f1, Fraction f2);
20 friend Fraction div(Fraction f1, Fraction f2);
21
22 private:
23 int up, down;
24
25 public:
26 static const string doc;
27 };
28
29 Fraction add(Fraction f1, Fraction f2);
30 Fraction sub(Fraction f1, Fraction f2);
31 Fraction mul(Fraction f1, Fraction f2);
32 Fraction div(Fraction f1, Fraction f2);
Fraction.cpp
1 #include "Fraction.h"
2 #include<iostream>
3 using std::string;
4 using std::cout;
5 using std::endl;
6
7 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" };
8
9 int gcd(int a, int b) {
10 int t;
11 if (a == 0 || b == 0)
12 return 0;
13 while (b != 0) {
14 t = a % b;
15 a = b;
16 b = t;
17 }
18 return a;
19 }
20 int gcs(int a, int b) {
21 if (gcd(a, b) == 0)
22 return 0;
23 return a * b / gcd(a, b);
24 }
25
26 Fraction::Fraction(int up0 , int down0) :up{ up0 }, down{ down0 } {};
27 Fraction::Fraction(const Fraction& obj) {
28 up = obj.up;
29 down = obj.down;
30 }
31
32 int Fraction::get_up ()const { return up; }
33 int Fraction::get_down ()const { return down; }
34 Fraction Fraction::negative() {
35 Fraction f;
36 if ( down > 0) {
37 f.up = -up;
38 f.down = down;
39 }
40
41
42 else if ( down < 0)
43 {
44 f.up = up;
45 f.down = -down;
46 }
47 return f;
48 }
49
50
51 Fraction add(Fraction f1, Fraction f2) {
52 Fraction f;
53 int r= gcs(f1.down, f2.down);
54 f.up = f1.up * (r / f1.down) + f2.up * (r / f2.down);
55 f.down = r;
56 return f;
57 }
58 Fraction sub(Fraction f1, Fraction f2) {
59 Fraction f;
60 f.up = f1.up * f2.up;
61 f.down = f1.down * f2.down;
62 return f;
63 }
64 Fraction mul(Fraction f1, Fraction f2) {
65 Fraction f;
66 int r = gcs(f1.down, f2.down);
67 f.up = f1.up * (r / f1.down) - f2.up * (r / f2.down);
68 f.down = r;
69 return f;
70 }
71 Fraction div(Fraction f1, Fraction f2) {
72 int t;
73 Fraction f;
74 t = f2.up;
75 f2.up = f2.down;
76 f2.down = t;
77 f=sub(f1, f2);
78 return f;
79 }
80 void output(Fraction f) {
81 int r = abs(gcd(f.up, f.down));
82 if (f.down == 0)
83 cout << "分母不能为0" << endl;
84 else if(f.up==0)
85 cout << f.up << endl;
86 else if (f.down > 0)
87 cout << f.up /r<< "/" << f.down/r << endl;
88 else if (f.down < 0)
89 cout << -(f.up/r) << "/" << -(f.down/r) << endl;
90
91
92 }
main.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 }
运行结果截图
实验五
源代码
account.h
1 #pragma once
2
3 class SavingsAccount {
4 private:
5 int id;
6 double balance;
7 double rate;
8 int lastDate;
9 static double total;
10 double accumulation;
11
12 void record(int date, double amount);
13 double aaccumulate(int date)const {
14 return accumulation + balance * (date - lastDate);
15 }
16
17 public:
18 SavingsAccount(int date, int id, double rate);
19 int getId() { return id; }
20 double getBalance() { return balance; }
21 double getRate() { return rate; }
22 static double getTotal() { return total; }
23 void deposit(int date, double amount);
24 void withraw(int date, double amount);
25 void settle(int date);
26 void show();
27 };
account.cpp
1 #include"account.h"
2 #include<iostream>
3 #include<cmath>
4
5 using namespace std;
6 double SavingsAccount::total = 0;
7 SavingsAccount::SavingsAccount(int date, int id, double rate) :id(id), balance(0), rate(rate), lastDate(date), accumulation(0) {
8 {cout << date << "\t#" << id << "is cteated" << endl; }
9 }
10 void SavingsAccount::record(int date, double amount) {
11 accumulation = aaccumulate(date);
12 lastDate = date;
13 amount = floor(amount * 100 + 0.5) / 100;
14 balance += amount;
15 total += amount;
16 cout << date << "\t#" << id << "\t" << amount << "\t" << balance << endl;
17 }
18
19 void SavingsAccount::deposit(int date, double amount) {
20 record(date, amount);
21 }
22
23 void SavingsAccount::withraw(int date, double amount) {
24 if (amount > getBalance()) {
25 cout << "Error:not enough money" << endl;
26 }
27 else
28 record(date, -amount);
29 }
30
31 void SavingsAccount::settle(int date) {
32 double interest = aaccumulate(date) * rate / 365;
33 if (interest != 0)
34 record(date, interest);
35 accumulation = 0;
36 }
37
38 void SavingsAccount::show() {
39 cout << "#" << id << "\tBalance: " << balance;
40 }
5_11.cpp
1 #include<iostream>
2 #include<cmath>
3 #include"account.h"
4
5 using namespace std;
6
7 int main() {
8 SavingsAccount sa0(1, 21325302, 0.015);
9 SavingsAccount sa1(1, 58320212, 0.015);
10
11 sa0.deposit(5, 5000);
12 sa1.deposit(25, 10000);
13 sa0.deposit(45, 5500);
14 sa1.withraw (60, 4000);
15
16 sa0.settle(90);
17 sa1.settle(90);
18
19 sa0.show(); cout << endl;
20 sa1.show(); cout << endl;
21 cout << "Total: " << SavingsAccount::getTotal() << endl;
22 }
运行结果截图
标签：const,int,c++,down,Complex,实验,Fraction,include From： https://www.cnblogs.com/hxqbbimoshuchou666/p/18494462