实验六

#include <iostream>
#include <stdexcept>

template <typename T>
class Vector {
    private:
        int size;
        T *vec;
    public:
        Vector<T>() = default;
        Vector<T>(int s);
        Vector<T>(int s, T t);
        Vector<T>(const Vector<T> &v);
        ~Vector<T>();
        int get_size() const;
        T& at(int i);
        T& operator[](int i);
        template <typename T1>
        friend void output(const Vector<T1> &v);
};
template <typename T>
Vector<T>::Vector(int s)
    : size{s} {
    vec = new T[s];
}
template <typename T>
Vector<T>::Vector(int s, T t)
    : size{s} {
    vec = new T[s];
    for (int i = 0; i < s; i++)
        vec[i] = t;
}
template <typename T>
Vector<T>::Vector(const Vector<T> &v)
    : size{v.size} {
    vec = new T[v.size];
    for (int i = 0; i < v.size; i++)
        vec[i] = v.vec[i];
}
template <typename T>
Vector<T>::~Vector() {
    delete[] vec;
}
template <typename T>
int Vector<T>::get_size() const {
    return size;
}
template <typename T>
T& Vector<T>::at(int i) {
    if (i > size) throw std::out_of_range("下标越界");
    else return vec[i];
}
template <typename T>
T& Vector<T>::operator[](int i) {
    if (i > size) throw std::out_of_range("下标越界");
    else return vec[i];
}
template <typename T1>
void output(const Vector<T1> &v) {
    for (int i = 0; i < v.size; i++)
        std::cout << v.vec[i] << ", ";
    std::cout << "\b\b \n";
}

#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 * 0.618;

    output(x1);

    Vector<int> x2(n, 777);
    Vector<int> x3(x2);

    output(x2);
    output(x3);

    x2.at(0) = 42;
    output(x2);

    x3[0] = 666;
    output(x3);
}

int main() {
    test();
}

#include<iostream>
#include<fstream>

void output(std::ostream &out) {
    for (int i = 0; i <= 26; i++) {
        out.width(2);
        if (i == 0) out << ' ';
        else out << i;
        for (int j = 0; j <= 26; j++) {
            out << ' ';
            if (i == 0) out << (char)('a' + (i + j) % 26);
            else out << (char)('A' + (i + j) % 26);
        }
        out << '\n';
    }
}
void output() {
    output(std::cout);
    std::ofstream ofile;
    ofile.open("cipher_key.txt");
    output(ofile);
    ofile.close();
}
int main() {
    output();
}