fork download
copy 
  1. #include <iostream>
  2. #include <sstream>
  3. #include <vector>
  4. #include <memory>
  5.  
  6. class Task
  7. {
  8.     std::string content;
  9. public:
  10.     Task(const std::string& title) : content(title) {}
  11.     virtual ~Task() = default;
  12.  
  13.     virtual bool check(std::istream& is) const = 0;
  14.  
  15. };
  16.  
  17. class TaskNumber : public Task
  18. {
  19.     int value;
  20. public:
  21.     TaskNumber(const std::string& title, int value) : Task{title}, value(value) {}
  22.  
  23.     bool check(std::istream& is) const override
  24.     {
  25.         int i;
  26.         is >> i;
  27.         return i == value;
  28.     }
  29.  
  30. };
  31.  
  32. class TaskString : public Task
  33. {
  34.     std::string value;
  35. public:
  36.     TaskString(const std::string& title, const std::string& s) : Task{title}, value(s) {}
  37.  
  38.     bool check(std::istream& is) const override
  39.     {
  40.         std::string s;
  41.         is >> s;
  42.         return s == value;
  43.     }
  44. };
  45.  
  46. class TaskCollection
  47. {
  48. public:
  49.     void addTask(std::unique_ptr<Task> task) { tasks.push_back(std::move(task)); }
  50.  
  51.     void run(std::istream& is) {
  52.         for (auto& task : tasks) {
  53.             std::cout << (task->check(is) ? "Success\n" : "Failed\n");
  54.         }
  55.     }
  56.  
  57. private:
  58.     std::vector<std::unique_ptr<Task>> tasks;
  59. };
  60.  
  61. int main()
  62. {
  63.     TaskCollection tasks;
  64.  
  65.     tasks.addTask(std::make_unique<TaskString>("t1", "Hello"));
  66.     tasks.addTask(std::make_unique<TaskString>("t2", "world"));
  67.     tasks.addTask(std::make_unique<TaskNumber>("t3", 42));
  68.  
  69.     std::string s{"Hi world 42"};
  70.     std::stringstream ss{s};
  71.     tasks.run(ss);
  72. }
  73.  
Success #stdin #stdout 0s 16064KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Failed
Success
Success
https://ideone.com/yCx3jc
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!