task1:
1 #include <iostream>
2 #include <string>
3 #include <vector>
4 #include <algorithm>
5
6 using namespace std;
7
8 // 声明
9 // 模板函数声明
10 template<typename T>
11 void output(const T &c);
12
13 // 普通函数声明
14 void test1();
15 void test2();
16 void test3();
17
18 int main() {
19 cout << "测试1: \n";
20 test1();
21
22 cout << "\n测试2: \n";
23 test2();
24
25 cout << "\n测试3: \n";
26 test3();
27 }
28
29 // 函数实现
30 // 输出容器对象c中的元素
31 template <typename T>
32 void output(const T &c) {
33 for(auto &i: c)
34 cout << i << " ";
35 cout << endl;
36 }
37
38 // 测试1
39 // 组合使用算法库、迭代器、string反转字符串
40 void test1() {
41 string s0{"0123456789"};
42 cout << "s0 = " << s0 << endl;
43
44 string s1{s0};
45 reverse(s1.begin(), s1.end()); // 反转指定迭代器区间的元素
46 cout << "s1 = " << s1 << endl;
47
48 string s2{s0};
49 reverse_copy(s0.begin(), s0.end(), s2.begin()); // 将指定迭代区间的元素拷贝到指定迭代器开始的目标区间，并且在复制过程中反转次序
50 cout << "s2 = " << s2 << endl;
51 }
52
53 // 测试2
54 // 组合使用算法库、迭代器、vector反转动态数组对象vector内数据
55 void test2() {
56 vector<int> v0{2, 0, 4, 9};
57 cout << "v0: ";
58 output(v0);
59
60 vector<int> v1{v0};
61 reverse(v1.begin(), v1.end());
62 cout << "v1: ";
63 output(v1);
64
65 vector<int> v2{v0};
66 reverse_copy(v0.begin(), v0.end(), v2.begin());
67 cout << "v2: ";
68 output(v2);
69 }
70
71 // 测试3
72 // 组合使用算法库、迭代器、vector实现元素旋转移位
73 void test3() {
74 vector<int> v0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
75 cout << "v0: ";
76 output(v0);
77
78 vector<int> v1{v0};
79 rotate(v1.begin(), v1.begin()+1, v1.end()); // 旋转指定迭代器区间[v1.begin(), v1.end())之间的数据项，旋转后从迭代器v1.begin()+1位置的数据项开始
80 cout << "v1: ";
81 output(v1);
82
83 vector<int> v2{v0};
84 rotate(v2.begin(), v2.begin()+2, v2.end());
85 cout << "v2: ";
86 output(v2);
87
88 vector<int> v3{v0};
89 rotate(v3.begin(), v3.end()-1, v3.end());
90 cout << "v3: ";
91 output(v3);
92
93 vector<int> v4{v0};
94 rotate(v4.begin(), v4.end()-2, v4.end());
95 cout << "v4: ";
96 output(v4);
97 }
View Code
运行结果截图：
task2:
1 #include <iostream>
2 #include <string>
3 #include <vector>
4 #include <algorithm>
5
6 using namespace std;
7
8 // 声明
9 // 模板函数声明
10 template<typename T>
11 void output(const T &c);
12
13 // 普通函数声明
14 void test1();
15 void test2();
16 void test3();
17
18 int main() {
19 cout << "测试1: \n";
20 test1();
21
22 cout << "\n测试2: \n";
23 test2();
24
25 cout << "\n测试3: \n";
26 test3();
27 }
28
29 // 函数实现
30 // 输出容器对象c中的元素
31 template <typename T>
32 void output(const T &c) {
33 for(auto &i: c)
34 cout << i << " ";
35 cout << endl;
36 }
37
38 // 测试1
39 // 组合使用算法库、迭代器、string反转字符串
40 void test1() {
41 string s0{"0123456789"};
42 cout << "s0 = " << s0 << endl;
43
44 string s1{s0};
45 reverse(s1.begin(), s1.end()); // 反转指定迭代器区间的元素
46 cout << "s1 = " << s1 << endl;
47
48 string s2{s0};
49 reverse_copy(s0.begin(), s0.end(), s2.begin()); // 将指定迭代区间的元素拷贝到指定迭代器开始的目标区间，并且在复制过程中反转次序
50 cout << "s2 = " << s2 << endl;
51 }
52
53 // 测试2
54 // 组合使用算法库、迭代器、vector反转动态数组对象vector内数据
55 void test2() {
56 vector<int> v0{2, 0, 4, 9};
57 cout << "v0: ";
58 output(v0);
59
60 vector<int> v1{v0};
61 reverse(v1.begin(), v1.end());
62 cout << "v1: ";
63 output(v1);
64
65 vector<int> v2{v0};
66 reverse_copy(v0.begin(), v0.end(), v2.begin());
67 cout << "v2: ";
68 output(v2);
69 }
70
71 // 测试3
72 // 组合使用算法库、迭代器、vector实现元素旋转移位
73 void test3() {
74 vector<int> v0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
75 cout << "v0: ";
76 output(v0);
77
78 vector<int> v1{v0};
79 rotate(v1.begin(), v1.begin()+1, v1.end()); // 旋转指定迭代器区间[v1.begin(), v1.end())之间的数据项，旋转后从迭代器v1.begin()+1位置的数据项开始
80 cout << "v1: ";
81 output(v1);
82
83 vector<int> v2{v0};
84 rotate(v2.begin(), v2.begin()+2, v2.end());
85 cout << "v2: ";
86 output(v2);
87
88 vector<int> v3{v0};
89 rotate(v3.begin(), v3.end()-1, v3.end());
90 cout << "v3: ";
91 output(v3);
92
93 vector<int> v4{v0};
94 rotate(v4.begin(), v4.end()-2, v4.end());
95 cout << "v4: ";
96 output(v4);
97 }
View Code
运行结果截图：
task3:
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) // 多组输入，直到按下Ctrl+Z后结束测试
12 cout << boolalpha << is_palindrome(s) << endl;
13 }
14
15 bool is_palindrome(std::string s) {
16 std::string s1(s);
17 std::reverse(s.begin(), s.end());
18 if (s == s1)return true;
19 else return false;
20 }
21 // 函数is_palindrom定义
22 // 待补足
23 // ×××
View Code
运行结果截图：
task4:
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 int x;
10
11 while (cin >> x) {
12 cout << "十进制: " << x << endl;
13 cout << "二进制: " << dec2n(x, 2) << 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 if (x == 0) return "0";
21 const char digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
22 std::string result;
23 bool isNegative = x < 0;
24 if (isNegative) x = -x;
25 while (x > 0) {
26 result += digits[x % n];
27 x /= n;
28 }
29 if (isNegative) result += '-';
30 std::reverse(result.begin(), result.end());
31 return result;
32 }
View Code
运行结果截图：
task5:
1 #include<iostream>
2 #include<string>
3 #include<vector>
4 #include<algorithm>
5 #include <iomanip>
6
7 using namespace std;
8
9 template<typename T>
10 void output(const T& c) {
11 for (auto& i : c){
12 char result = 'A' + i;
13 cout << result << " ";
14 }
15 cout << endl;
16 }
17
18 void test();
19
20 int main() {
21 cout <<" a b c d e f g h i j k l m n o p q r s t u v w x y z" << endl;
22 test();
23 return 0;
24 }
25
26 void test() {
27 /*char v0[26],v1[26];
28 for (int i = 0; i <= 25; i++) {
29 v0[i] = 'A' + i;
30 }
31 rotate(v0.begin(), v0.begin + 1, v0.end());*/
32 vector<int>v0{ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25 };
33 for (int i = 0; i < 26; i++) {
34 cout << setw(2) << i + 1 << ' ';
35 rotate(v0.begin(), v0.begin() + 1, v0.end());
36 output(v0);
37 }
38 }
View Code
运行结果截图：
task6:
1 #include<iostream>
2 #include<cstdlib>
3 #include<ctime>
4 #include<iomanip>
5
6 int main() {
7 std::srand(static_cast<unsigned int>(std::time(0)));
8
9 const int numQuestions = 10;
10 int correctAnswers = 0;
11
12 for (int i = 0; i < numQuestions; ++i) {
13 int operand1 = std::rand() % 10 + 1;
14 int operand2 = std::rand() % 10 + 1;
15 char operation;
16
17 do {
18 operation = "+-*/"[std::rand() % 4];
19 if (operation == '-') {
20 while (operand1 <= operand2) {
21 operand1 = std::rand() % 10 + 1;
22 operand2 = std::rand() % 10 + 1;
23 }
24 }
25 else if (operation == '/') {
26 while (operand1 % operand2 != 0) {
27 operand1 = std::rand() % 10 + 1;
28 operand2 = std::rand() % 10 + 1;
29 }
30 }
31 } while ((operation == '-' && operand1 <= operand2) || (operation == '/' && operand1 % operand2 != 0));
32 int correctResult;
33 switch (operation) {
34 case '+':correctResult = operand1 + operand2; break;
35 case '-':correctResult = operand1 - operand2; break;
36 case '*':correctResult = operand1 * operand2; break;
37 case '/':correctResult = operand1 / operand2; break;
38 }
39
40 std::cout << operand1 << " " << operation << " " << operand2 << " = ";
41
42 int userAnswer;
43 std::cin >> userAnswer;
44
45 if (userAnswer == correctResult) {
46 ++correctAnswers;
47 }
48 }
49
50 double accuracy = static_cast<double>(correctAnswers) / numQuestions * 100;
51 std::cout << "你的正确率是: " << std::fixed << std::setprecision(2) << accuracy << "%" << std::endl;
52
53 return 0;
54 }
View Code
运行结果截图：
标签：begin,end,cout,C++,v0,v1,实验,include From： https://www.cnblogs.com/yuannauy/p/18453508