运行结果1
问题1:
不能运行，因为func函数未声明
问题2:
普通构造函数可以初始化，复制构造函数是对同类对象的引用，移动构造函数是对参数右值的引用，编译周期结束时，自动调用析构函数
问题3:
不能运行
实验任务2
1 //Complex.h
2 #pragma once
3 #include <string>
4 #include<iostream>
5 #include<cmath>
6 // 类Complex: 声明
7 class Complex {
8 public:
9 Complex();
10 Complex(double r);
11 Complex(double r, double i);
12 Complex(const Complex& c);
13 double get_real()const;
14 double get_imag()const;
15 void add(const Complex& c);
16 //~Complex(); // 析构函数
17 // void output(const Complex& c);
18 void output()const;
19 //void Complex add(const Complex& c);
20 static const std::string doc;
21 friend Complex add(const Complex& c1, const Complex& c2);
22 friend bool is_equal(const Complex& c1, const Complex& c2);
23 friend bool is_not_equal(const Complex& c1, const Complex& c2);
24 friend double abs(const Complex& c);
25 //friend Complex output(const Complex& c);
26 friend std::ostream& operator<<(std::ostream& os, const Complex& c);
27
28 private:
29 double real;
30 double imag;
31
32 };
1 //Complex.cpp
2 #include "Complex.h"
3 // 普通函数实现
4 #include <iostream>
5 #include <string>
6 using std::cout;
7 using std::endl;
8 using std::string;
9 // static成员数据类外初始化
10 const std::string Complex::doc = " a simplified complex class";
11
12
13 // 对象方法
14 Complex::Complex() :real(0), imag(0) {}
15 Complex::Complex(double r) :real(r), imag(0) {}
16 Complex::Complex(double r, double i) :real(r), imag(i) {}
17 Complex::Complex(const Complex& c) : real(c.real), imag(c.imag) {}
18
19
20 // 类方法
21 double Complex::get_real()const {
22 return real;
23 }
24 double Complex::get_imag() const {
25 return imag;
26 }
27 void Complex::add(const Complex& c) {
28 real += c.real;
29 imag += c.imag;
30 }//将复数加到自身
31 std::ostream& operator<<(std::ostream& os, const Complex& c) {
32 os << c.real << (c.imag >= 0 ? "+" : "") << c.imag << "i";
33 return os;
34 }// 输出流重载
35 Complex add(const Complex& c1, const Complex& c2) {
36 return Complex(c1.real + c2.real, c1.imag + c2.imag);
37 }//加法友元
38 bool is_equal(const Complex& c1, const Complex& c2) {
39 if ((c1.real == c2.real) && (c1.imag == c2.imag))
40 return true;
41 return false;
42 }//判等友元
43 bool is_not_equal(const Complex& c1, const Complex& c2) {
44 return !is_equal(c1, c2);
45 }//判不等友元
46 double abs(const Complex& c) {
47 return std::sqrt(c.real * c.real + c.imag * c.imag);
48 }//取模友元
49 void Complex::output() const {
50 if (imag >= 0)
51 std::cout << real << " + " << imag << "i" << std::endl;
52 else
53 std::cout << real << " - " << imag * (-1) << "i" << std::endl;
54 }//输出
1 //task2.cpp
2 #include "Complex.h"
3 #include <iostream>
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 = "; c1.output(); cout << endl;
22 cout << "c2 = "; c2.output(); cout << endl;
23 cout << "c3 = "; c3.output(); cout << endl;
24 cout << "c4 = "; c4.output(); 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 = "; c1.output(); 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 = "; c4.output(); cout << endl;
38
39 }
40
41 int main() {
42 test();
43
44 }
运行结果2
实验任务3
提供Complex<返回值类型> Complex+名称+real/imag直接返回虚部实部的值，虚数运算c1+c2,判等直接比较
在虚数计算和判等时直接用+-代替而不是另外编写函数
实验任务4
1 #pragma once
2 #include<string>
3
4 class Fraction{
5 public:
6 static const std::string doc;
7 Fraction(int up = 0, int down = 1);
8 Fraction(const Fraction& f);
9 int get_up()const;
10 int get_down()const;
11 int gcd(int m,int n)const;
12 Fraction negative()const;
13 friend Fraction add(const Fraction& f1, const Fraction& f2);
14 friend Fraction sub(const Fraction& f1,const Fraction& f2);
15 friend Fraction mul(const Fraction& f1,const Fraction& f2);
16 friend Fraction div(const Fraction& f1, const Fraction& f2);
17 friend void output(const Fraction& f);
18 void simplify();
19 private:
20 int up, down;
21 int m, n;
22 };
1 #include "Fraction.h"
2 #include<iostream>
3 #include<string>
4 #include <numeric>
5
6 using std::cout;
7 using std::endl;
8 using std::string;
9
10 const std::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.";
11
12
13 Fraction::Fraction(int u, int d) : up(u), down(d) {
14 simplify();
15 }
16
17 Fraction::Fraction(const Fraction& f) :up(f.up), down(f.down) {}
18
19 int gcd(int a, int b) {
20 while (b != 0) {
21 int temp = b;
22 b = a % b;
23 a = temp;
24 }
25 return abs(a); // 返回绝对值
26 }
27
28 void Fraction::simplify() {
29 if (down < 0) { // 保证分母为正
30 up = -up;
31 down = -down;
32 }
33 int divisor = gcd(abs(up), abs(down));
34 up /= divisor;
35 down /= divisor;
36 }
37
38
39 int Fraction::get_up()const {
40 return up;
41 }
42 int Fraction::get_down()const {
43 return down;
44 }
45 Fraction Fraction::negative()const {
46 return Fraction(-up, down);
47 }
48
49 //友元
50 void output(const Fraction& f)
51 {
52 if (f.get_up() == 0 && f.get_down() == 0)
53 printf("分母不能为0\n");
54 else if (f.get_up() == 0 && f.get_down() != 0)
55 std::cout << "0" << std::endl;
56 else
57 std::cout << f.get_up() << "/" << f.get_down() << std::endl;
58 }
59 Fraction add(const Fraction& f1, const Fraction& f2)
60 {
61 return Fraction(f1.get_up() * f2.get_down() + f2.get_up() * f1.get_down(), f1.get_down() * f2.get_down());
62 }
63 Fraction sub(const Fraction& f1, const Fraction& f2)
64 {
65 return Fraction(f1.get_up() * f2.get_down() - f2.get_up() * f1.get_down(), f1.get_down() * f2.get_down());
66 }
67 Fraction mul(const Fraction& f1, const Fraction& f2)
68 {
69 return Fraction(f1.get_up() * f2.get_up(), f1.get_down() * f2.get_down());
70 }
71 Fraction div(const Fraction& f1, const Fraction& f2) {
72 if (f2.get_up() == 0) {
73 //throw std::invalid_argument("除数不能为零");
74 printf("分母不能为0\n");
75 Fraction f(0, 0);
76 return f;
77 }
78 return Fraction(f1.get_up() * f2.get_down(), f1.get_down() * f2.get_up());
79 }
1 #include "Fraction.h"
2 #include <iostream>
3
4 using std::cout;
5
6 using std::endl;
7
8 void test1() {
9 cout << "Fraction类测试: " << endl;
10 cout << Fraction::doc << endl << endl;
11 Fraction f1(5);
12 Fraction f2(3, -4), f3(-18, 12);
13 Fraction f4(f3);
14 cout << "f1 = "; output(f1); cout << endl;
15 cout << "f2 = "; output(f2); cout << endl;
16 cout << "f3 = "; output(f3); cout << endl;
17 cout << "f4 = "; output(f4); cout << endl;
18 Fraction f5(f4.negative());
19 cout << "f5 = "; output(f5); cout << endl;
20 cout << "f5.get_up() = " << f5.get_up() << ", f5.get_down() = " <<
21
22 f5.get_down() << endl;
23 cout << "f1 + f2 = "; output(add(f1, f2)); cout << endl;
24 cout << "f1 - f2 = "; output(sub(f1, f2)); cout << endl;
25 cout << "f1 * f2 = "; output(mul(f1, f2)); cout << endl;
26 cout << "f1 / f2 = "; output(div(f1, f2)); cout << endl;
27 cout << "f4 + f5 = "; output(add(f4, f5)); cout << endl;
28 }
29
30 void test2() {
31 Fraction f6(42, 55), f7(0, 3);
32 cout << "f6 = "; output(f6); cout << endl;
33 cout << "f7 = "; output(f7); cout << endl;
34 cout << "f6 / f7 = "; output(div(f6, f7)); cout << endl;
35 }
36 int main() {
37 cout << "测试1: Fraction类基础功能测试\n";
38 test1();
39 cout << "\n测试2: 分母为0测试: \n";
40 test2();
41 }
运行结果4
实验任务5
1 #pragma once
2 class SavingsAccount {
3 private:
4 int id;
5 double balance;
6 double rate;
7 int lastDate;
8 double accumulation;
9 static double total;
10 void record(int date, double amount);
11 double accumulate(int date)const {
12 return accumulation + balance * (date - lastDate);
13 }
14 public:
15 SavingsAccount(int date, int id, double rate);
16 int getId()const { return id; }
17 double getBalance()const { return balance;}
18 double getRate()const { return rate;}
19 static double getTotal() { return total; }
20 void deposit(int date, double amount);
21 void withdraw(int date, double amount);
22 void settle(int date);
23 void show()const;
24 };
1 #include"account.h"
2 #include<cmath>
3 #include<iostream>
4 using namespace std;
5
6 double SavingsAccount::total = 0;
7 SavingsAccount::SavingsAccount(int date, int id, double rate) :
8 id(id), balance(0), rate(rate), lastDate(date), accumulation(0) {
9 cout << date << "\t#" << id << "is created" << endl;
10 }
11 void SavingsAccount::record(int date, double amount) {
12 accumulation = accumulate(date);
13 lastDate = date;
14 amount = floor(amount * 100 + 0.5) / 100;
15 balance += amount;
16 total += amount;
17 cout << date << "\t#" << id << "\t" << amount << "\t" << balance << endl;
18 }
19 void SavingsAccount::deposit(int date, double amount) {
20 record(date, amount);
21 }
22 void SavingsAccount::withdraw(int date, double amount) {
23 if (amount > getBalance())
24 cout << "Error:not enough money" << endl;
25 else
26 record(date, -amount);
27 }
28 void SavingsAccount::settle(int date) {
29 double interest = accumulate(date) * rate / 365;
30 if (interest != 0)
31 record(date, interest);
32 accumulation = 0;
33 }
34 void SavingsAccount::show()const {
35 cout << "#" << id << "\tBalance:" << balance;
36 }
1 #include"account.h"
2 #include<iostream>
3 using namespace std;
4 int main()
5 {
6 SavingsAccount sa0(1, 21325302, 0.015);
7 SavingsAccount sa1(1, 58320212, 0.015);
8 sa0.deposit(5, 5000);
9 sa1.deposit(25, 10000);
10 sa0.deposit(45, 5500);
11 sa1.withdraw(60,4000);
12 sa0.settle(90);
13 sa1.settle(90);
14 sa0.show(); cout << endl;
15 sa1.show(); cout << endl;
16 cout << "Total:" << SavingsAccount::getTotal() << endl;
17 return 0;
18 }
运行结果5
标签：std,const,int,double,Complex,实验,Fraction,程序设计 From： https://www.cnblogs.com/CK1NG/p/18494425