oop实验1
task1:
1 // 现代C++标准库、算法库体验 2 // 本例用到以下内容: 3 // 1. 字符串string, 动态数组容器类vector、迭代器 4 // 2. 算法库：反转元素次序、旋转元素 5 // 3. 函数模板、const引用作为形参 6 7 #include <iostream> 8 #include <string> 9 #include <vector> 10 #include <algorithm> 11 12 using namespace std; 13 14 // 声明 15 // 模板函数声明 16 template<typename T> 17 void output(const T &c); 18 19 // 普通函数声明 20 void test1(); 21 void test2(); 22 void test3(); 23 24 int main() { 25 cout << "测试1: \n"; 26 test1(); 27 28 cout << "\n测试2: \n"; 29 test2(); 30 31 cout << "\n测试3: \n"; 32 test3(); 33 } 34 35 // 函数实现 36 // 输出容器对象c中的元素 37 template <typename T> 38 void output(const T &c) { 39 for(auto &i: c) 40 cout << i << " "; 41 cout << endl; 42 } 43 44 // 测试1 45 // 组合使用算法库、迭代器、string反转字符串 46 void test1() { 47 string s0{"0123456789"}; 48 cout << "s0 = " << s0 << endl; 49 50 string s1{s0}; 51 reverse(s1.begin(), s1.end()); // 反转指定迭代器区间的元素 52 cout << "s1 = " << s1 << endl; 53 54 string s2{s0}; 55 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 56 cout << "s2 = " << s2 << endl; 57 } 58 59 // 测试2 60 // 组合使用算法库、迭代器、vector反转动态数组对象vector内数据 61 void test2() { 62 vector<int> v0{2, 0, 4, 9}; 63 cout << "v0: "; 64 output(v0); 65 66 vector<int> v1{v0}; 67 reverse(v1.begin(), v1.end()); 68 cout << "v1: "; 69 output(v1); 70 71 vector<int> v2{v0}; 72 reverse_copy(v0.begin(), v0.end(), v2.begin()); 73 cout << "v2: "; 74 output(v2); 75 } 76 77 // 测试3 78 // 组合使用算法库、迭代器、vector实现元素旋转移位 79 void test3() { 80 vector<int> v0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; 81 cout << "v0: "; 82 output(v0); 83 84 vector<int> v1{v0}; 85 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 86 cout << "v1: "; 87 output(v1); 88 89 vector<int> v2{v0}; 90 rotate(v2.begin(), v2.begin()+2, v2.end()); 91 cout << "v2: "; 92 output(v2); 93 94 vector<int> v3{v0}; 95 rotate(v3.begin(), v3.end()-1, v3.end()); 96 cout << "v3: "; 97 output(v3); 98 99 vector<int> v4{v0}; 100 rotate(v4.begin(), v4.end()-2, v4.end()); 101 cout << "v4: "; 102 output(v4); 103 }
实验结果截图：
task2:
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 // 函数声明 11 // 模板函数声明 12 template<typename T> 13 void output(const T &c); 14 15 // 普通函数声明 16 int rand_int_100(); 17 void test1(); 18 void test2(); 19 20 int main() { 21 cout << "测试1: \n"; 22 test1(); 23 24 cout << "\n测试2: \n"; 25 test2(); 26 } 27 28 // 函数实现 29 // 输出容器对象c中的元素 30 template <typename T> 31 void output(const T &c) { 32 for(auto &i: c) 33 cout << i << " "; 34 cout << endl; 35 } 36 37 // 返回[0, 100]区间内的一个随机整数 38 int rand_int_100() { 39 return rand() % 101; 40 } 41 42 // 测试1 43 // 对容器类对象指定迭代器区间进行赋值、排序 44 void test1() { 45 vector<int> v0(10); // 创建一个动态数组对象v0, 对象大小为10 46 generate(v0.begin(), v0.end(), rand_int_100); // 产生[0, 100]之间的随机整数赋值给指定迭代器区间[v0.begin(), v0.end())内的每个数据项 47 cout << "v0: "; 48 output(v0); 49 50 vector<int> v1{v0}; 51 sort(v1.begin(), v1.end()); // 对指定迭代器区间[v1.begin(), v1.end())内数据项进行升序排序 52 cout << "v1: "; 53 output(v1); 54 55 vector<int> v2{v0}; 56 sort(v2.begin()+1, v2.end()-1); // 对指定迭代器区间[v1.begin()+1, v1.end()-1)内数据项进行升序排序 57 cout << "v2: "; 58 output(v2); 59 } 60 61 // 测试2 62 // 对容器类对象指定迭代器区间进行赋值、计算最大值/最小值/均值 63 void test2() { 64 vector<int> v0(10); 65 generate(v0.begin(), v0.end(), rand_int_100); 66 cout << "v0: "; 67 output(v0); 68 69 auto iter1 = min_element(v0.begin(), v0.end()); 70 cout << "最小值: " << *iter1 << endl; 71 72 auto iter2 = max_element(v0.begin(), v0.end()); 73 cout << "最大值: " << *iter2 << endl; 74 75 auto ans = minmax_element(v0.begin(), v0.end()); 76 cout << "最小值: " << *(ans.first) << endl; 77 cout << "最大值: " << *(ans.second) << endl; 78 double avg1 = accumulate(v0.begin(), v0.end(), 0)/v0.size(); 79 cout << "均值: " << fixed << setprecision(2) << avg1 << endl; 80 81 cout << endl; 82 83 vector<int> v1{v0}; 84 cout << "v0: "; 85 output(v0); 86 sort(v1.begin(), v1.end()); 87 double avg2 = accumulate(v1.begin()+1, v1.end()-1, 0)/(v1.size()-2); 88 cout << "去掉最大值、最小值之后，均值: " << avg2 << endl; 89 }
实验结果截图：
task3:
1 #include <iostream> 2 #include <string> 3 #include <algorithm> 4 5 bool is_palindrome(std::string s){ 6 std::string reversed_s=s; 7 std::reverse(reversed_s.begin(),reversed_s.end()); 8 if(s==reversed_s){ 9 return true; 10 } else{ 11 return false; 12 } 13 } 14 15 int main() { 16 using namespace std; 17 string s; 18 19 while(cin >> s) // 多组输入，直到按下Ctrl+Z后结束测试 20 cout << boolalpha << is_palindrome(s) << endl; 21 }
实验结果截图：
task4:
1 #include <iostream> 2 #include <string> 3 #include <algorithm> 4 5 std::string dec2n(int x, int n = 2) 6 { 7 std::string result; 8 while(x>0) 9 { 10 int remainder=x%n; 11 if(remainder<10) 12 { 13 result+=remainder+'0'; 14 } 15 else 16 { 17 result+=remainder-10+'A'; 18 } 19 x/=n; 20 } 21 std::reverse(result.begin(),result.end()); 22 return result; 23 } 24 25 int main() { 26 using namespace std; 27 28 int x; 29 while(cin >> x) { 30 cout << "十进制: " << x << endl; 31 cout << "二进制: " << dec2n(x) << endl; 32 cout << "八进制: " << dec2n(x, 8) << endl; 33 cout << "十六进制: " << dec2n(x, 16) << endl << endl; 34 } 35 }
实验结果截图：
task5:
1 #include<iostream> 2 int main() 3 { 4 for(int i=1;i<=26;i++) 5 { 6 std::string encrypted_letters=""; 7 for(char letter='A';letter<='Z';letter++) 8 { 9 int new_index=((letter-'A'+i)%26); 10 encrypted_letters+=(char)('A'+new_index); 11 } 12 std::cout<<encrypted_letters<<std::endl; 13 } 14 return 0; 15 }
实验结果截图：
task6:
1 #include <iostream> 2 #include <cstdlib> 3 #include <ctime> 4 #include <iomanip> 5 6 int generateRandomNumber(int min, int max) { 7 return rand() % (max - min + 1) + min; 8 } 9 10 void generateRandomOperation(int &num1, int &num2, char &op) { 11 int choice = rand() % 4; 12 switch (choice) { 13 case 0: 14 num1 = generateRandomNumber(1, 10); 15 num2 = generateRandomNumber(1, 10); 16 op = '+'; 17 break; 18 case 1: 19 num1 = generateRandomNumber(2, 10); 20 num2 = generateRandomNumber(1, num1 - 1); 21 op = '-'; 22 break; 23 case 2: 24 num1 = generateRandomNumber(1, 10); 25 num2 = generateRandomNumber(1, 10); 26 op = '*'; 27 break; 28 case 3: 29 num1 = generateRandomNumber(1, 10); 30 num2 = generateRandomNumber(1, 10); 31 while (num1 % num2!= 0) { 32 num2 = generateRandomNumber(1, 10); 33 } 34 op = '/'; 35 break; 36 } 37 } 38 39 int calculateResult(int num1, int num2, char op) { 40 switch (op) { 41 case '+': 42 return num1 + num2; 43 case '-': 44 return num1 - num2; 45 case '*': 46 return num1 * num2; 47 case '/': 48 return num1 / num2; 49 } 50 return 0; 51 } 52 53 int main() { 54 srand(static_cast<unsigned int>(time(0))); 55 int correctCount = 0; 56 int totalCount = 10; 57 58 for (int i = 0; i < totalCount; ++i) { 59 int num1, num2; 60 char op; 61 generateRandomOperation(num1, num2, op); 62 63 std::cout << num1 << " " << op << " " << num2 << " = "; 64 int userAnswer; 65 std::cin >> userAnswer; 66 67 int correctAnswer = calculateResult(num1, num2, op); 68 if (userAnswer == correctAnswer) { 69 correctCount++; 70 } 71 } 72 73 double accuracy = (static_cast<double>(correctCount) / totalCount) * 100.0; 74 std::cout << "正确率：" << std::fixed << std::setprecision(2) << accuracy << "%" << std::endl; 75 76 return 0; 77 }
实验结果截图：
