任务1：
源代码task1.cpp
1 #include <iostream>
2 #include <string>
3 #include <vector>
4 #include <algorithm>
5
6 using namespace std;
7
8 template<typename T>
9 void output(const T &c);
10
11 void test1();
12 void test2();
13 void test3();
14
15 int main() {
16 cout << "测试1: \n";
17 test1();
18
19 cout << "\n测试2: \n";
20 test2();
21
22 cout << "\n测试3: \n";
23 test3();
24 }
25
26 template <typename T>
27 void output(const T &c) {
28 for(auto &i: c)
29 cout << i << " ";
30 cout << endl;
31 }
32
33 void test1() {
34 string s0{"0123456789"};
35 cout << "s0 = " << s0 << endl;
36
37 string s1{s0};
38 reverse(s1.begin(), s1.end());
39 cout << "s1 = " << s1 << endl;
40
41 string s2{s0};
42 reverse_copy(s0.begin(), s0.end(), s2.begin());
43 cout << "s2 = " << s2 << endl;
44 }
45
46 void test2() {
47 vector<int> v0{2, 0, 4, 9};
48 cout << "v0: ";
49 output(v0);
50
51 vector<int> v1{v0};
52 reverse(v1.begin(), v1.end());
53 cout << "v1: ";
54 output(v1);
55
56 vector<int> v2{v0};
57 reverse_copy(v0.begin(), v0.end(), v2.begin());
58 cout << "v2: ";
59 output(v2);
60 }
61
62 void test3() {
63 vector<int> v0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
64 cout << "v0: ";
65 output(v0);
66
67 vector<int> v1{v0};
68 rotate(v1.begin(), v1.begin()+1, v1.end());
69 cout << "v1: ";
70 output(v1);
71
72 vector<int> v2{v0};
73 rotate(v2.begin(), v2.begin()+2, v2.end());
74 cout << "v2: ";
75 output(v2);
76
77 vector<int> v3{v0};
78 rotate(v3.begin(), v3.end()-1, v3.end());
79 cout << "v3: ";
80 output(v3);
81
82 vector<int> v4{v0};
83 rotate(v4.begin(), v4.end()-2, v4.end());
84 cout << "v4: ";
85 output(v4);
86 }
运行结果截图：
任务2：
源代码task2.cpp
1 #include <iostream>
2 #include <vector>
3 #include <string>
4 #include <algorithm>
5 #include <numeric>
6 #include <iomanip>
7
8 using namespace std;
9
10 template<typename T>
11 void output(const T &c);
12
13 int rand_int_100();
14 void test1();
15 void test2();
16
17 int main() {
18 cout << "测试1: \n";
19 test1();
20
21 cout << "\n测试2: \n";
22 test2();
23 }
24
25 template <typename T>
26 void output(const T &c) {
27 for(auto &i: c)
28 cout << i << " ";
29 cout << endl;
30 }
31
32 int rand_int_100() {
33 return rand() % 101;
34 }
35
36 void test1() {
37 vector<int> v0(10);
38 generate(v0.begin(), v0.end(), rand_int_100);
39 cout << "v0: ";
40 output(v0);
41
42 vector<int> v1{v0};
43 sort(v1.begin(), v1.end());
44 cout << "v1: ";
45 output(v1);
46
47 vector<int> v2{v0};
48 sort(v2.begin()+1, v2.end()-1);
49 cout << "v2: ";
50 output(v2);
51 }
52
53 void test2() {
54 vector<int> v0(10);
55 generate(v0.begin(), v0.end(), rand_int_100);
56 cout << "v0: ";
57 output(v0);
58
59 auto iter1 = min_element(v0.begin(), v0.end());
60 cout << "最小值: " << *iter1 << endl;
61
62 auto iter2 = max_element(v0.begin(), v0.end());
63 cout << "最大值: " << *iter2 << endl;
64
65 auto ans = minmax_element(v0.begin(), v0.end());
66 cout << "最小值: " << *(ans.first) << endl;
67 cout << "最大值: " << *(ans.second) << endl;
68 double avg1 = accumulate(v0.begin(), v0.end(), 0)/v0.size();
69 cout << "均值: " << fixed << setprecision(2) << avg1 << endl;
70
71 cout << endl;
72
73 vector<int> v1{v0};
74 cout << "v0: ";
75 output(v0);
76 sort(v1.begin(), v1.end());
77 double avg2 = accumulate(v1.begin()+1, v1.end()-1, 0)/(v1.size()-2);
78 cout << "去掉最大值、最小值之后，均值: " << avg2 << endl;
79 }
运行结果截图：
任务3：
源代码task3.cpp
1 #include <iostream>
2 #include <string>
3 #include <algorithm>
4
5 bool is_palindrome(std::string s);
6
7 int main() {
8 using namespace std;
9 string s;
10
11 while(cin >> s)
12 cout << boolalpha << is_palindrome(s) << endl;
13 }
14
15 bool is_palindrome(std::string s)
16 {
17 using namespace std;
18 string t{s};
19 reverse(t.begin(),t.end());
20 if(s.compare(t)==0)
21 {
22 return true;
23 }
24 else
25 {
26 return false;
27 }
28
29 }
运行结果截图：
任务4：
源代码task4.cpp
1 #include <iostream>
2 #include <string>
3 #include <algorithm>
4
5 std::string dec2n(int x, int n = 2);
6
7 int main() {
8 using namespace std;
9
10 int x;
11 while(cin >> x) {
12 cout << "十进制: " << x << endl;
13 cout << "二进制: " << dec2n(x) << endl;
14 cout << "八进制: " << dec2n(x, 8) << endl;
15 cout << "十六进制: " << dec2n(x, 16) << endl << endl;
16 }
17 }
18
19 std::string dec2n(int x,int n)
20 {
21 std::string a="";
22 do{
23 int temp=0;
24 temp=x%n;
25 if(temp>=0&&temp<=9){
26 a+=(temp+'0');
27 }else{
28 a+=(temp+'A'-10);
29 }
30 x/=n;
31 }while(x);
32 reverse(a.begin(),a.end());
33 return a;
34 }
运行结果截图：
任务5：
源代码task5.cpp
1 #include<iostream>
2 #include<iomanip>
3 #include<algorithm>
4
5 using namespace std;
6
7 void output(string &c){
8 for(auto &i: c){
9 cout << setw(2) << i;
10 }
11 cout << endl;
12 }
13
14 int main()
15 {
16 string s1{"abcdefghijklmnopqrstuvwxyz"};
17 string s2{"ABCDEFGHIJKLMNOPQRSTUVWXYZ"};
18 cout << " ";
19 output(s1);
20 int i=1;
21 while(i<=26)
22 {
23 cout << setw(2) << i;
24 rotate(s2.begin(),s2.begin()+1,s2.end());
25 output(s2);
26 i++;
27 }
28
29 return 0;
30
31 }
运行结果显示：
任务6：
源代码task6.cpp
1 #include <iostream>
2 #include <cstdlib>
3 #include <ctime>
4 #include <iomanip>
5
6 using namespace std;
7
8 int getRandomInt() {
9 return rand() % 10 + 1;
10 }
11
12 pair<string, int> generateProblem() {
13 int num1 = getRandomInt();
14 int num2 = getRandomInt();
15 char operators[] = {'+', '-', '*', '/'};
16 char op;
17 int correctAnswer;
18
19 do {
20 op = operators[rand() % 4];
21
22 if (op == '-') {
23 while (num1 <= num2) {
24 num1 = getRandomInt();
25 num2 = getRandomInt();
26 }
27 correctAnswer = num1 - num2;
28 } else if (op == '/') {
29 while (num1 % num2 != 0) {
30 num1 = getRandomInt();
31 num2 = getRandomInt();
32 }
33 correctAnswer = num1 / num2;
34 } else if(op == '+'){
35 correctAnswer = num1 + num2;
36 }else{
37 correctAnswer = num1 * num2;
38 }
39 } while (op == '/' && num1 / num2 < 1);
40
41 string problem = to_string(num1) + " " + string(1, op) + " " + to_string(num2);
42 return make_pair(problem, correctAnswer);
43 }
44
45 int main() {
46 srand(static_cast<unsigned int>(time(0)));
47 int correctCount = 0;
48
49 for (int i = 0; i < 10; ++i) {
50 pair<string, int> problem = generateProblem();
51 cout << problem.first << " = ";
52 int userAnswer;
53 cin >> userAnswer;
54
55 if (userAnswer == problem.second) {
56 ++correctCount;
57 }
58 }
59
60 double accuracy = static_cast<double>(correctCount) / 10 * 100;
61 cout << fixed << setprecision(2) << "正确率: " << accuracy << "%" << endl;
62
63 return 0;
64 }
运行结果显示：
实验总结
通过实验1我感受到了使用C++标准库编写程序的便利，并对对象的封装、函数有了更深的了解
标签：begin,end,cout,int,编程,C++,v0,实验,include From： https://www.cnblogs.com/xuruize/p/18457065