实验1 C++
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 }
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 }
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 // ×××
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 }
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 }
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 }
运行结果截图：
