task1.cpp
1 #include<iostream>
2 #include<string>
3 #include<vector>
4 #include<array>
5
6 template<typename T>
7 void output1(const T &obj){
8 for(auto i:obj)
9 std::cout<<i<<", ";
10 std::cout<<"\b\b \n";
11 }
12
13 template<typename T>
14 void output2(const T &obj){
15 for(auto p=obj.begin();p!=obj.end(); ++p)
16 std::cout<<*p<<", ";
17 std::cout<<"\b\b \n";
18 }
19
20 void test_array(){
21 using namespace std;
22
23 array<int,5> x1;
24 cout<<"x1.size(）="<<x1.size()<< endl;
25 x1.fill(42);
26 x1.at(0)=999;
27 x1[4]=-999;
28 cout<<"x1:";
29 output1(x1);
30 cout<<"x1:";
31 output2(x1);
32
33 array<int,5> x2(x1);
34 cout<<boolalpha<<(x1==x2)<<endl;
35 x2.fill(22);
36 cout<<"x2:";
37 output1(x2);
38 swap(x1,x2);
39 cout<<"x1: ";
40 output1(x1);
41 cout<<"x2: ";
42 output1(x2);
43
44 }
45
46 void test_vector(){
47 using namespace std;
48
49 vector<int> v1;
50 cout<<v1.size()<< endl;
51 cout<<v1.max_size()<<endl;
52 v1.push_back(55);
53 cout<<"v1: ";
54 output1(v1);
55
56 vector<int> v2{1,0,5,2};
57 v2.pop_back();
58 v2.erase(v2.begin());
59 v2.insert(v2.begin(), 999);
60 v2.insert(v2.end(), -999);
61 cout << v2.size() << endl;
62 cout << "v2: ";
63 output2(v2);
64
65 vector<int>v3(5,42);
66 cout<<"v3:";
67 output1(v3);
68
69 vector<int> v4(v3.begin(),v3.end()-2);
70 cout<<"v4:";
71 output1(v4);
72 }
73
74 void test_string(){
75 using namespace std;
76
77 string s1{"oop"};
78 cout<<s1.size()<<endl;
79 for(auto &i:s1)
80 i-=32;
81 s1+="2023";
82 s1.append(",hello");
83 cout<< s1<<endl;
84 }
85
86 int main() {
87 using namespace std;
88 cout << "==========测试1: array模板类基础用法==========" << endl;
89 test_array();
90 cout << "\n==========测试2: vector模板类基础用法==========" << endl;
91 test_vector();
92 cout << "\n==========测试3: string类基础用法==========" << endl;
93 test_string();
94 }
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task2.cpp
1 #include <iostream>
2 #include <complex>
3
4 void test_std_complex() {
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() << ", " << "c3.imag = " << c3.imag()
12 << endl;
13 cout << "c1 + c2 = " << c1 + c2 << endl;
14 cout << "c1 - c2 = " << c1 - c2 << endl;
15 cout << "abs(c1) = " << abs(c1) << endl;
16 cout << boolalpha;
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 }
24 int main() {
25 test_std_complex();
26 }
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task3.cpp
1 #include <iostream>
2 #include <string>
3 using namespace std;
4
5 class T {
6 public:
7 T(int x = 0, int y = 0);
8 T(const T &t);
9 T(T &&t);
10 ~T();
11 void set_m1(int x);
12 int get_m1() const;
13 int get_m2() const;
14 void display() const;
15 friend void func();
16 private:
17 int m1, m2;
18 public:
19 static void disply_count();
20 public:
21 static const string doc;
22 static const int max_count;
23 private:
24 static int count;
25 };
26
27 const string T::doc{"a simple class"};
28 const int T::max_count = 99;
29 int T::count = 0;
30
31 T::T(int x, int y): m1{x}, m2{y} {
32 ++count;
33 cout << "constructor called.\n";
34 }
35 T::T(const T &t): m1{t.m1}, m2{t.m2} {
36 ++count;
37 cout << "copy constructor called.\n";
38 }
39
40 T::T(T &&t): m1{t.m1}, m2{t.m2} {
41 ++count;
42 cout << "move constructor called.\n";
43 }
44 T::~T() {
45 --count;
46 cout << "destructor called.\n";
47 }
48 void T::set_m1(int x) {
49 m1 = x;
50 }
51 int T::get_m1() const {
52 return m1;
53 }
54 int T::get_m2() const {
55 return m2;
56 }
57 void T::display() const {
58 cout << m1 << ", " << m2 << endl;
59 }
60
61 void T::disply_count() {
62 cout << "T objects: " << count << endl;
63 }
64
65 void func() {
66 T t1;
67 t1.set_m1(55);
68 t1.m2 = 77;
69 t1.display();
70 }
71
72 void test() {
73 cout << "T class info: " << T::doc << endl;
74 cout << "T objects max_count: " << T::max_count << endl;
75 T::disply_count();
76 T t1;
77 t1.display();
78 t1.set_m1(42);
79 T t2{t1};
80 t2.display();
81 T t3{std::move(t1)};
82 t3.display();
83 t1.display();
84 T::disply_count();
85 }
86
87 int main() {
88 cout << "============测试类T============" << endl;
89 test();
90 cout << endl;
91 cout << "============测试友元函数func()============" << endl;
92 func();
93 }
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task4.cpp
1 #include <iostream>
2 #include <string>
3 #include <iomanip>
4 using namespace std;
5
6 class Rect {
7 private:
8 double length;
9 double width;
10 static int count;
11
12 public:
13 static string doc;
14 Rect() : length(0), width(0) {
15 ++count;
16 }
17 Rect(double l, double w) : length(l), width(w) { count++; }
18 Rect(const Rect& r) : length(r.length), width(r.width) { count++; }
19 ~Rect() {
20 --count;
21 }
22 double area() const { return length * width; }
23 double perimeter() const { return 2 * (length + width); }
24 void resize(double l, double w) {
25 length = l;
26 width = w;
27 }
28 void resize(double s) {
29 length = s;
30 width = s;
31 }
32 friend void output(const Rect& r);
33 static int size_info() {
34 return count;
35 }
36 };
37
38 int Rect::count = 0;
39 string Rect::doc { "a simple rect class"};
40
41
42 void output(const Rect &r) {
43 cout << "矩形信息: " << endl;
44 cout << fixed << setprecision(2);
45 cout << "长: " << r.length << endl;
46 cout << "宽: " << r.width << endl;
47 cout << "面积: " << r.area() << endl;
48 cout << "周长: " << r.perimeter() << endl;
49
50 }
51
52 void test() {
53 cout << "矩形类信息: " << Rect::doc << endl;
54 cout << "当前矩形对象数目: " << Rect::size_info() << endl;
55 Rect r1;
56 output(r1);
57 Rect r2(4, 3);
58 output(r2);
59 Rect r3(r2);
60 r3.resize(2);
61 output(r3);
62 r3.resize(5, 2);
63 output(r3);
64 cout << "当前矩形对象数目: " << Rect::size_info() << endl;
65 }
66
67 int main() {
68 test();
69 cout << "当前矩形对象数目: " << Rect::size_info() << endl;
70 }
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task5.cpp
1 #include <iostream>
2 #include <cmath>
3
4 class Complex {
5 private:
6 double real;
7 double imag;
8 public:
9 Complex();
10 Complex(double real0);
11 Complex(double real0,double imag0);
12 Complex(const Complex &obj);
13
14 double get_real()const;
15 double get_imag()const;
16 void show()const;
17 void add(const Complex &obj);
18
19 friend Complex add(Complex obj1,Complex obj2);
20 friend bool is_equal(const Complex &obj1,const Complex &obj2);
21 friend double abs(const Complex &obj);
22 };
23
24 Complex::Complex() {
25 real=imag=0;
26 }
27 Complex::Complex(double real0) {
28 real=real0;
29 imag=0;
30 }
31
32 Complex::Complex(double real0,double imag0) {
33 real=real0;
34 imag=imag0;
35 }
36
37 Complex::Complex(const Complex &obj) {
38 real=obj.real;
39 imag=obj.imag;
40 }
41
42 double Complex::get_real()const {
43 return real;
44 }
45 double Complex::get_imag()const {
46 return imag;
47 }
48 void Complex::show()const {
49 if(imag!=0)
50 std::cout<<real<<imag<<"i";
51 else
52 std::cout<<real;
53 }
54 void Complex::add(const Complex &obj) {
55 real=real+obj.real;
56 imag=imag+obj.imag;
57 }
58
59 Complex add(Complex obj1,Complex obj2) {
60 obj1.real=obj1.real+obj2.real;
61 obj1.imag=obj1.imag+obj2.imag;
62 return obj1;
63 }
64 bool is_equal(const Complex &obj1,const Complex &obj2) {
65 if(obj1.real==obj2.real&&obj1.imag==obj2.imag) return true;
66 else return false;
67 }
68 double abs(const Complex &obj) {
69 return sqrt(pow(obj.real,2)+pow(obj.imag,2));
70 }
71
72 void test() {
73 using namespace std;
74 Complex c1(3, -4);
75 const Complex c2(4.5);
76 Complex c3(c1);
77 cout << "c1 = ";
78 c1.show();
79 cout << endl;
80 cout << "c2 = ";
81 c2.show();
82 cout << endl;
83 cout << "c2.imag = " << c2.get_imag() << endl;
84 cout << "c3 = ";
85 c3.show();
86 cout << endl;
87 cout << "abs(c1) = ";
88 cout << abs(c1) << endl;
89 cout << boolalpha;
90 cout << "c1 == c3 : " << is_equal(c1, c3) << endl;
91 cout << "c1 == c2 : " << is_equal(c1, c2) << endl;
92 Complex c4;
93 c4 = add(c1, c2);
94 cout << "c4 = c1 + c2 = ";
95 c4.show();
96 cout << endl;
97 c1.add(c2);
98 cout << "c1 += c2, " << "c1 = ";
99 c1.show();
100 cout << endl;
101 }
102 int main() {
103 test();
104 }
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标签：const,cout,对象,double,void,编程,int,Complex,实验 From： https://www.cnblogs.com/chenxiaolong202083290491/p/17769946.html