task1
代码：
1 #include <iostream>
2 #include <complex>
3 int main()
4 {
5 using namespace std;
6 complex<double> c1{3, 4}, c2{4.5};
7 const complex<double> c3{c2};
8 cout << "c1 = " << c1 << endl;
9 cout << "c2 = " << c2 << endl;
10 cout << "c3 = " << c3 << endl;
11 cout << "c3.real = " << c3.real() << endl;
12 cout << "c3.imag = " << c3.imag() << endl;
13 cout << "c1 + c2 = " << c1 + c2 << endl;
14 cout << "c1 - c2 = " << c1 - c2 << endl;
15 cout << "abs(c1) = " << abs(c1) << endl; // abs()是标准库中数学函数，对复数进行取模
16 cout << boolalpha; // 设置bool型值以true/false方式输出
17 cout << "c1 == c2 : " << (c1 == c2) << endl;
18 cout << "c3 == c2 : " << (c3 == c2) << endl;
19 complex<double> c4 = 2;
20 cout << "c4 = " << c4 << endl;
21 c4 += c1;
22 cout << "c4 = " << c4 << endl;
23 }
测试结果：
task2
代码：
1 ing>
2
3 // 妯℃澘鍑芥暟
4 // 瀵规弧瓒崇壒瀹氭潯浠剁殑搴忓垪绫诲瀷T锛屼娇鐢ㄨ寖鍥磃or杈撳嚭
5 template<typename T>
6 void output1(const T &obj) {
7 for(auto i: obj)
8 std::cout << i << ", ";
9 std::cout << "\b\b \n";
10 }
11
12 // 妯℃澘鍑芥暟
13 // 瀵规弧瓒崇壒瀹氭潯浠剁殑搴忓垪绫诲瀷T锛屼娇鐢ㄨ凯浠ｅ櫒杈撳嚭
14 template<typename T>
15 void output2(const T &obj) {
16 for(auto p = obj.cbegin(); p != obj.cend(); ++p)
17 std::cout << *p << ", ";
18 std::cout << "\b\b \n";
19 }
20
21 int main() {
22 using namespace std;
23
24 array<int, 5> x1; // 鍒涘缓涓€涓猘rray瀵硅薄锛屽寘鍚?涓猧nt绫诲瀷鍏冪礌锛屾湭鍒濆鍖?
25 cout << "x1.size() = " << x1.size() << endl; // 杈撳嚭鍏冪礌涓暟
26 x1.fill(42); // 灏唜1鐨勬墍鏈夊厓绱犲€奸兘璧嬪€间负42
27 x1.at(0) = 999; // 鎶婁笅鏍囦负0鐨勫厓绱犱慨鏀逛负999
28 x1.at(4) = -999; // 鎶婁笅鏍囦负4鐨勫厓绱犱慨鏀逛负-999
29 x1[1] = 777; // 鎶婁笅鏍囦负1鐨勫厓绱犱慨鏀逛负777
30 cout << "x1: ";
31 output1(x1);
32 cout << "x1: ";
33 output2(x1);
34
35
36 array<double, 10> x2{1.5, 2.2}; // 鍒涘缓瑕佺粰array瀵硅薄锛屽寘鍚?0涓猟ouble绫诲瀷鍏冪礌锛屽垵濮嬪寲閮ㄥ垎鍏冪礌
37 cout << "x2.size() = " << x2.size() << endl;
38 cout << "x2: ";
39 output1(x2);
40
41 array<int, 5> x3{x1};
42 cout << boolalpha << (x1 == x3) << endl;
43 x3.fill(22);
44 cout << "x3: ";
45 output1(x3);
46
47 swap(x1, x3); // 浜ゆ崲x1鍜寈3鐨勬暟鎹?
48 cout << "x1: ";
49 output1(x1);
50 cout << "x3: ";
51 output1(x3);
52 }
测试结果：
task3
代码：
1 #include "Employee.hpp"
2 #include <iostream>
3
4 void test() {
5 using std::cout;
6 using std::endl;
7
8 cout << Employee::doc << endl << endl;
9
10 Employee employee1;
11 employee1.set_info("Sam", 30000, 2015, 1, 6);
12 employee1.update_hire_date(2017, 6, 30);
13 employee1.update_salary(35000);
14 employee1.display_info();
15 cout << endl << endl;
16
17 Employee employee2{"Tony", 20000, 2020, 3, 16};
18 employee2.raise_salary(15); // 鎻愭垚15%
19 employee2.display_info();
20 cout << endl << endl;
21
22 Employee::display_count();
23 }
24
25 int main() {
26 test();
27 }
测试结果：
task4
代码：
1 #include<cmath>
2 class Complex
3 {
4 public:
5 Complex(){
6 real=0;
7 imag=0;
8 }
9 Complex(float x){
10 real=x;
11 imag=0;
12 }
13 Complex(float x,float y){
14 real=x;
15 imag=y;
16 }
17 Complex(const Complex &xx){
18 real=xx.get_real();
19 imag=xx.get_imag();
20 }
21 float get_real() const;
22 float get_imag() const;
23 void show() const;
24 friend Complex add (const Complex,const Complex);
25 friend bool is_equal (const Complex,const Complex);
26 friend float abs (const Complex);
27 private:
28 float real,imag;
29 } ;
30 Complex::float get_real() const{
31 return real;
32 }
33 Complex::float get_imag() const{
34 return imag;
35 }
36 Complex::void show() const{
37 printf("%f+%fi\n",real,imag);
38 }
39 Complex::void add(Complex &xx){
40 real+=xx.get_real();
41 imag+=xx.get_imag();
42 }
43 Complex add(Complex a,Complex b)
44 {
45 Complex c(a.get_real()+b.get_real(),a.get_imag()+b.get_imag());
46 return c;
47 }
48 bool is_equal(Complex a,Complex b)
49 {
50 if(a.get_imag()==b.get_imag()&&a.get_real()==b.get_real())
51 return true;
52 else return false;
53 }
54 float abs(Complex a)
55 {
56 return sqrt(a.get_real()*a.get_real()+a.get_imag()*a.get_imag());
57 }
测试结果：
task5
代码：
1 #include<iostream>
2 #include<cstring>
3 using namespace std;
4 class User
5 {
6 public:
7 User(string a,string b="111111",string c="")
8 {
9 name=a;
10 password=b;
11 email=c;
12 n++;
13 }
14 ~User(){
15 n--;
16 }
17 static int n;
18 void set_email()
19 {
20 printf("请输入邮箱：");
21 cin>>email;
22 }
23 void change_passwd(){
24 string f="";
25 int t=0;
26 while(f!=password&&t<3)
27 {
28 printf("输入旧密码：");
29 cin>>f;
30 t++;
31 }
32 if(t==3) printf("稍后再试");
33 else
34 {
35 printf("输入新密码:");
36 cin>>f;
37 password=f;
38 }
39 }
40 void print_info(){
41 cout<<"用户名:"<<name<<endl;
42 cout<<"密码：";
43 for(int i=0;i<password.length();i++) cout<<'*';
44 cout<<endl;
45 cout<<"邮箱："<<email;
46 }
47 static void print_n(){
48 cout<<"n="<<n;
49 }
50 private:
51 string name,password,email;
52 } ;
53 int User::n=0;
测试结果：
标签：real,const,cout,get,对象,imag,Complex,实验 From： https://www.cnblogs.com/git-porn-hub/p/16840394.html