Натолкните на мысль, как построить диаграмму классов по этому коду
| C++ |
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| #include <string>
#include <iostream>
class File
{
public:
File()
{
std::cout « "File construct was called" « std::endl;
}
File(const std::string& path) : _path(path)
{
std::cout « "File overload construct was called. Path is " « _path « std::endl;
open();
}
virtual ~File()
{
if (_is_open)
close();
std::cout « "File overload construct was called. Path is " « _path « std::endl;
}
virtual bool open()
{
if (_is_open)
return true;
_is_open = true;
std::cout « "File open was called" « std::endl;
}
virtual void close()
{
_is_open = false;
std::cout « "File close was called" « std::endl;
}
std::string path() const
{
return _path;
}
virtual void read(char& c)
{
if (!_is_open)
return;
std::cout « "File read char was called" « std::endl;
}
virtual void read(std::string& str)
{
if (!_is_open)
return;
std::cout « "File read string was called" « std::endl;
}
private:
bool _is_open;
std::string _path;
};
struct MyData { int count; };
class SpecialFile : public File
{
public:
SpecialFile() : data(new MyData)
{
}
SpecialFile(const std::string& path) : File(path), data(new MyData)
{
}
~SpecialFile()
{
delete data;
}
bool open()
{
bool ok = File::open();
std::cout « "SpecialFile open was called" « std::endl;
return ok;
}
void close()
{
File::close();
std::cout « "SpecialFile close was called" « std::endl;
}
void read(std::string& str)
{
File::read(str);
if (str == "special")
data->count += 1;
std::cout « "SpecialFile read string was called" « std::endl;
}
private:
MyData *data;
};
int main()
{
File *p_file = new SpecialFile("task.in");
std::string str;
p_file->read(str);
return 0;
} |
|
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