实验6 模板类、文件I/O和异常处理

实验任务4

Vector.hpp

 1 #pragma once
 2 
 3 #include <iostream>
 4 #include <stdexcept>
 5 
 6 using namespace std;
 7 
 8 template <typename T>
 9 
10 class Vector {
11 private:
12     T* data; 
13     size_t size; 
14 
15 public:
16     Vector(size_t sz) : size(sz) {
17         data = new T[size];
18     }
19 
20     Vector(size_t sz, const T& value) : size(sz) {
21         data = new T[size];
22         for (size_t i = 0; i < size; ++i) 
23         {
24             data[i] = value;
25         }
26     }
27 
28     Vector(const Vector& other) : size(other.size) {
29         data = new T[size];
30         for (size_t i = 0; i < size; ++i) 
31         {
32             data[i] = other.data[i];
33         }
34     }
35 
36     ~Vector() {
37         delete[] data;
38     }
39 
40     size_t get_size() const {
41         return size;
42     }
43 
44     T& at(size_t index) {
45         if (index < size) 
46         {
47             return data[index];
48         } 
49         else 
50         {
51             throw out_of_range("Index out of range");
52         }
53     }
54 
55     T& operator[](size_t index) {
56         if (index < size) 
57         {
58             return data[index];
59         } 
60         else 
61         {
62             throw out_of_range("Index out of range");
63         }
64     }
65 
66     friend void output(const Vector& vec) {
67         for (size_t i = 0; i < vec.size; ++i) 
68         {
69             cout << vec.data[i] << ' ';
70         }
71         cout << endl;
72     }
73 };

task4.cpp

 1 #include <iostream>
 2 #include "Vector.hpp"
 3 
 4 void test() {
 5     using namespace std;
 6 
 7     int n;
 8     cin >> n;
 9     
10     Vector<double> x1(n);
11     for(auto i = 0; i < n; ++i)
12         x1.at(i) = i * 1.414;
13 
14     output(x1);
15 
16     Vector<int> x2(n, 27);
17     Vector<int> x3(x2);
18 
19     output(x2);
20     output(x3);
21 
22     x2.at(0) = 50;
23     output(x2);
24 
25     x3[0] = 999;
26     output(x3);
27 }
28 
29 int main() {
30     test();
31 }

运行测试结果

 实验任务5

task5.cpp

 1 #include <iostream>
 2 #include <iomanip>
 3 #include <fstream>
 4 
 5 using namespace std;
 6 
 7 void output(ostream &out) {
 8     
 9     const int numLines = 26;
10 
11     for (int i = 0; i < numLines; ++i) {
12         out << setw(2) << right << i + 1 << ' '; 
13         for (int j = 0; j < 26; ++j) 
14         {
15             char ch = 'A' + (i + j) % 26;
16             out << ch << ' '; 
17         }
18         out << endl;
19     }
20 }
21 
22 int main() {
23     
24     cout << "输出矩阵:\n" 
25          << "   a b c d e f g h i j k l m n o p q r s t u v w x y z" 
26          << endl;
27          
28     output(cout);
29 
30     ofstream outFile("cipher_key.txt");
31     
32     if (outFile.is_open()) 
33     {
34         output(outFile);
35         outFile.close();
36     } 
37     else 
38     {
39         return 1;
40     }
41 
42     return 0;
43 }

运行测试结果