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实验一

时间:2024-10-13 17:43:15浏览次数:1  
标签:begin cout int v0 v1 实验 include

任务1

#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
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());
  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};
  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);
}

任务2

#include <algorithm>
#include <iomanip>
#include <iostream>
#include <numeric>
#include <string>
#include <vector>
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,
  // 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;
}

任务3

#include <algorithm>
#include <iostream>
#include <string>
bool is_palindrome(std::string s);
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;
}
// 函数is_palindrom定义
// 待补足
// ××
bool is_palindrome(std::string s)
{
  std::string d = s;
  reverse(d.begin(), d.end());
  if (d == s)
  {
    return true;
  }
  return false;
}

任务4

#include <algorithm>
#include <iostream>
#include <string>
std::string dec2n(int x, int n = 2);
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;
  }
}
// 函数dec2n定义
// 待补足
// ×××
std::string dec2n(int x, int n)
{
  using namespace std;
  string s;
  string a{"0123456789ABCDEF"};

  while (x / n)
  {
    s.append(a, x % n, 1);
    x /= n;
  }
  s.append(a, x % n, 1);
  reverse(s.begin(), s.end());
  return s;
}

任务5

#include <algorithm>
#include <bits/stdc++.h>
#include <iostream>
#include <string>
int main()
{
  using namespace std;
  cout << setw(2) << " ";
  for (int i = 0; i < 26; i++)
    cout << setw(2) << char('a' + i);
  cout << endl;
  for (int i = 1; i < 27; i++)
  {
    cout << setw(2) << i;
    for (int j = 0; j < 26; j++)
    {
      if (j + i < 26)
        cout << setw(2) << char('A' + j + i);
      if (j + i >= 26)
        cout << setw(2) << char('A' + i + j - 26);
    }
    cout << endl;
  }
  return 0;
}

任务6

#include <algorithm>
#include <bits/stdc++.h>
#include <iostream>
#include <string>
using namespace std;
char rand_char();
int main()
{
  int sum = 0;
  for (int i = 0; i < 10; i++)
  {
    int n1 = rand() % 10 + 1;
    int n2 = rand() % 10 + 1;
    char f = rand_char();
    int t;
    int anb;
    int aa;
    if (f == '-')
    {
      if (n1 < n2)
      {
        t = n1;
        n1 = n2;
        n2 = t;
      }
      anb = n1 - n2;
    }

    if (f == '/')
    {
      while (n1 % n2 != 0)
        n2 = rand() % 10 + 1;
      anb = n1 / n2;
    }
    if (f == '+')
    {
      anb = n1 + n2;
    }
    if (f == '*')
    {
      anb = n1 * n2;
    }

    cout << setw(2) << n1 << f << n2 << "=";

    cin >> aa;
    if (aa == anb)
      sum = sum + 1;
  }
  sum = sum * 10;
  cout << fixed << "正确率:" << setprecision(2) << sum << '%' << endl;
}
int rand_int_10()
{
  return rand() % 11;
}
char rand_char()
{
  char fh[] = {'+', '-', '*', '/'};
  return fh[rand() % 4];
}

 

 

 

标签:begin,cout,int,v0,v1,实验,include
From: https://www.cnblogs.com/mxh999/p/18458502

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