实验6 模板类、文件I/O和异常处理

Task4:
 vector.hpp:

#include<iostream>
#include<string>
#include<stdexcept>

using namespace std;

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

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();
}

 Task5:
main:

#include<iostream>
#include<fstream>
#include<string>
#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;
for(int 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;
}