oop实验1

task1:

// 现代C++标准库、算法库体验
// 本例用到以下内容:
// 1. 字符串string, 动态数组容器类vector、迭代器
// 2. 算法库：反转元素次序、旋转元素
// 3. 函数模板、const引用作为形参

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

// 声明
// 模板函数声明
template<typename T>
void output(const T &c);

// 普通函数声明
void test1();
void test2();
void test3();

int main() {
    cout << "测试1: \n";
    test1();

    cout << "\n测试2: \n";
    test2();

    cout << "\n测试3: \n";
    test3();
}

// 函数实现
// 输出容器对象c中的元素
template <typename T>
void output(const T &c) {
    for(auto &i: c)
        cout << i << " ";
    cout << endl;
}

// 测试1
// 组合使用算法库、迭代器、string反转字符串
void test1() {
    string s0{"0123456789"};
    cout << "s0 = " << s0 << endl;

    string s1{s0};
    reverse(s1.begin(), s1.end());  // 反转指定迭代器区间的元素
    cout << "s1 = " << s1 << endl;

    string s2{s0};
    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
    cout << "s2 = " << s2 << endl;
}

// 测试2
// 组合使用算法库、迭代器、vector反转动态数组对象vector内数据
void test2() {
    vector<int> v0{2, 0, 4, 9};
    cout << "v0: ";
    output(v0);

    vector<int> v1{v0};
    reverse(v1.begin(), v1.end());
    cout << "v1: ";
    output(v1);

    vector<int> v2{v0};
    reverse_copy(v0.begin(), v0.end(), v2.begin());
    cout << "v2: ";
    output(v2);
}

// 测试3
// 组合使用算法库、迭代器、vector实现元素旋转移位
void test3() {
    vector<int> v0{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
    cout << "v0: ";
    output(v0);

    vector<int> v1{v0};
    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
    cout << "v1: ";
    output(v1);

    vector<int> v2{v0};
    rotate(v2.begin(), v2.begin()+2, v2.end());
    cout << "v2: ";
    output(v2);

    vector<int> v3{v0};
    rotate(v3.begin(), v3.end()-1, v3.end());
    cout << "v3: ";
    output(v3);

    vector<int> v4{v0};
    rotate(v4.begin(), v4.end()-2, v4.end());
    cout << "v4: ";
    output(v4);
}

 

实验结果截图：

 

task2:

 

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <numeric>
#include <iomanip>

using namespace std;

// 函数声明
// 模板函数声明
template<typename T>
void output(const T &c);

// 普通函数声明
int rand_int_100();
void test1();
void test2();

int main() {
    cout << "测试1: \n";
    test1();

    cout << "\n测试2: \n";
    test2();
}

// 函数实现
// 输出容器对象c中的元素
template <typename T>
void output(const T &c) {
    for(auto &i: c)
        cout << i << " ";
    cout << endl;
}

// 返回[0, 100]区间内的一个随机整数
int rand_int_100() {
    return rand() % 101;
}

// 测试1
// 对容器类对象指定迭代器区间进行赋值、排序
void test1() {
    vector<int> v0(10);  // 创建一个动态数组对象v0, 对象大小为10
    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
    cout << "v0: ";
    output(v0);

    vector<int> v1{v0};
    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
    cout << "v1: ";
    output(v1);

    vector<int> v2{v0};
    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
    cout << "v2: ";
    output(v2);
}

// 测试2
// 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
void test2() {
    vector<int> v0(10);  
    generate(v0.begin(), v0.end(), rand_int_100); 
    cout << "v0: ";
    output(v0);

    auto iter1 = min_element(v0.begin(), v0.end());
    cout << "最小值: " << *iter1 << endl;

    auto iter2 = max_element(v0.begin(), v0.end());
    cout << "最大值: " << *iter2 << endl;

    auto ans = minmax_element(v0.begin(), v0.end());
    cout << "最小值: " << *(ans.first) << endl;
    cout << "最大值: " << *(ans.second) << endl;
    double avg1 = accumulate(v0.begin(), v0.end(), 0)/v0.size();
    cout << "均值: " << fixed << setprecision(2) << avg1 << endl;

    cout << endl;

    vector<int> v1{v0};
    cout << "v0: ";
    output(v0);
    sort(v1.begin(), v1.end());
    double avg2 = accumulate(v1.begin()+1, v1.end()-1, 0)/(v1.size()-2);
    cout << "去掉最大值、最小值之后，均值: " << avg2 << endl;
}

 

实验结果截图：

 

task3:

 

#include <iostream>
#include <string>
#include <algorithm>

bool is_palindrome(std::string s){
    std::string reversed_s=s;
    std::reverse(reversed_s.begin(),reversed_s.end());
    if(s==reversed_s){
        return true;
    } else{
        return false;
    }
}

int main() {
    using namespace std;
    string s;

    while(cin >> s)  // 多组输入，直到按下Ctrl+Z后结束测试
        cout << boolalpha << is_palindrome(s) << endl;
}

 

实验结果截图：

 

task4:

 

#include <iostream>
#include <string>
#include <algorithm>

std::string dec2n(int x, int n = 2)
{
    std::string result;
    while(x>0)
    {
        int remainder=x%n;
        if(remainder<10)
        {
            result+=remainder+'0';
        }
        else
        {
            result+=remainder-10+'A';
        }
        x/=n;
    }
    std::reverse(result.begin(),result.end());
    return result;
}

int main() {
    using namespace std;

    int x;
    while(cin >> x) {
        cout << "十进制: " << x << endl;
        cout << "二进制: " << dec2n(x) << endl;
        cout << "八进制: " << dec2n(x, 8) << endl;
        cout << "十六进制: " << dec2n(x, 16) << endl << endl;
    }
}

 

实验结果截图：

 

task5:

 

#include<iostream>
int main()
{
    for(int i=1;i<=26;i++)
    {
        std::string encrypted_letters="";
        for(char letter='A';letter<='Z';letter++)
        {
            int new_index=((letter-'A'+i)%26);
            encrypted_letters+=(char)('A'+new_index);
        }
        std::cout<<encrypted_letters<<std::endl;
    }
    return 0;
}

 

实验结果截图：

 

task6:

 

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <iomanip>

int generateRandomNumber(int min, int max) {
    return rand() % (max - min + 1) + min;
}

void generateRandomOperation(int &num1, int &num2, char &op) {
    int choice = rand() % 4;
    switch (choice) {
        case 0: 
            num1 = generateRandomNumber(1, 10);
            num2 = generateRandomNumber(1, 10);
            op = '+';
            break;
        case 1: 
            num1 = generateRandomNumber(2, 10);
            num2 = generateRandomNumber(1, num1 - 1);
            op = '-';
            break;
        case 2: 
            num1 = generateRandomNumber(1, 10);
            num2 = generateRandomNumber(1, 10);
            op = '*';
            break;
        case 3: 
            num1 = generateRandomNumber(1, 10);
            num2 = generateRandomNumber(1, 10);
            while (num1 % num2!= 0) {
                num2 = generateRandomNumber(1, 10);
            }
            op = '/';
            break;
    }
}

int calculateResult(int num1, int num2, char op) {
    switch (op) {
        case '+':
            return num1 + num2;
        case '-':
            return num1 - num2;
        case '*':
            return num1 * num2;
        case '/':
            return num1 / num2;
    }
    return 0;
}

int main() {
    srand(static_cast<unsigned int>(time(0)));
    int correctCount = 0;
    int totalCount = 10;

    for (int i = 0; i < totalCount; ++i) {
        int num1, num2;
        char op;
        generateRandomOperation(num1, num2, op);

        std::cout << num1 << " " << op << " " << num2 << " = ";
        int userAnswer;
        std::cin >> userAnswer;

        int correctAnswer = calculateResult(num1, num2, op);
        if (userAnswer == correctAnswer) {
            correctCount++;
        }
    }

    double accuracy = (static_cast<double>(correctCount) / totalCount) * 100.0;
    std::cout << "正确率：" << std::fixed << std::setprecision(2) << accuracy << "%" << std::endl;

    return 0;
}

 

实验结果截图：