实验6

 #include <iostream>
 #include "Vector.hpp"
 
 void test() {
     using namespace std;
     int n;
     cin >> n;
     Vector<double> x1(n);
     for (auto i = 0; i < n; ++i)
         x1.at(i) = i * 0.7;
    output(x1);
   Vector<int> x2(n, 42);
     Vector<int> x3(x2);  
     output(x2);
     output(x3);
    x2.at(0) = 77;
    output(x2);
    x3[0] = 999;
    output(x3);

 int main() {
    test();
   return 0;
 }

　　

 #include <iostream>
  #include <stdexcept>
  
  template <typename T>
  class Vector {
 private:
      T* data;
      size_t size;
 public:
     Vector(size_t n) : size(n) {
        data = new T[size];
     }
     Vector(size_t n, const T& value) : size(n) {
        data = new T[size];
        for (size_t i = 0; i < size; ++i) {
            data[i] = value;
         }
    }
     Vector(const Vector& other) : size(other.size) {
       data = new T[size];
        for (size_t i = 0; i < size; ++i) {
            data[i] = other.data[i];
         }
     }  
     ~Vector() {
         delete[] data;     }
 
     size_t get_size() const {
         return size;
     }
   
     T& at(size_t i) {
        if (i >= size) {
             throw std::out_of_range("Index out of range");
         }
        return data[i];
    }   
    T& operator[](size_t i) {
        if (i >= size) {
            throw std::out_of_range("Index out of range");
        }
        return data[i];
     }
     friend void output(const Vector& v) {
         for (size_t i = 0; i < v.size; ++i) {
            std::cout << v.data[i] << " ";
         }
      std::cout << std::endl;
    }
 };

#include<iostream>
#include<iomanip>
#include<fstream>

using namespace std;

void output(std::ostream& output){
    output << " ";
    for (int i = 97; i < 123; i++){
        output << setw(2) << char(i);
    }
    cout << endl;
    for (int i = 1; i <= 26; i++){
        output << setw(2) << i;
    int j;
    for (j=i;j<i+26;j++){
        output << setw(2) << char(65+j%26);
    }
    cout << endl;
}
}

int main()
{
    ofstream out;
    output(cout);
    out.open("cipher_key.txt");
    output(out);
    return 0; 
}