实验任务4

vector.hpp

#include<iostream>
#include<stdexcept>
#include <cassert>
using namespace std;
template<typename T>
class Vector
{
private:
    T* ptr;
    int size;
public:

    Vector(int size)
    {
        if (size < 0)
        throw std::length_error("vector constructor:negative size");
        this->size = size;
        ptr = new T[this->size];
    }
    Vector(int size, T value)
    {
        if (size < 0)
        throw std::length_error("vector constructor:negative size");
        this->size = size; 
        ptr = new T[size];
        for (auto i = 0; i < size; i++)
        {
            ptr[i] = value;
        }

    }
    Vector(const Vector<T>& x)
    {
        size = x.size;
        ptr = new T[size];
        for (auto i = 0; i < size; i++)
        {
            ptr[i] = x.ptr[i];
        }
    }
    ~Vector()
    {
        delete[] ptr;
    }
    int get_size() 
    { return size; 
     }
    T& at(int i)
    {
        assert(i >= 0 && i < size);
        return(ptr[i]);
    }
    T& at(int i) const
    {
        assert(i >= 0 && i < size);
        return(ptr[i]);
    }
    T& operator[](int i)
    {
        return ptr[i];
    }
    friend void output(Vector<T> x)
    {
        for (auto i = 0; i < x.get_size(); i++)
            cout << x.at(i) << ",";
        cout << "\b\b\n";
    }
};

task4.cpp

#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();
}

实验任务5

task5.cpp

#include<iostream>
#include<fstream>
#include<iomanip>
using namespace std;

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

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