nmcf,
В общем смысл задания реализовать с помощью лямбда-выражений набор команд, совершающих операции над контенйром 1-го уровня
в cmds находятся лямбда-выражения
в cmdsNames имена
219-230 - выполнение выражений из стека, это и пытаюсь сделать
Ps надо было делать это для дерева, но с ним еще более тяжко... Пытался для стека
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| C++ |
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| typedef std::function<void(void)> Command;
int main()
{
Btree<Figure> b;
Stack<Command> cmds;
Stack<std::string> cmdsNames;
Stack<Command> cmds3;
Stack<Command> cmds2;
Stack<std::string> cmdsNames2;
std::mutex mtx;
Command cmdInsert = [&]()
{
std::lock_guard<std::mutex> guard(mtx);
unsigned int seed = std::chrono::system_clock::now().time_since_epoch().count();
std::default_random_engine generator(seed);
std::uniform_int_distribution<int> distrFigureType(1, 3);
std::uniform_int_distribution<int> distrFigureParam(1, 10);
std::cout << "================" << std::endl;
std::cout << "Command: insert" << std::endl;
switch (distrFigureType(generator))
{
case 1:
{
std::cout << "================" << std::endl;
std::cout << "Inserted: square" << std::endl;
double side = distrFigureParam(generator);
b.bstInsert(std::shared_ptr<Square>(new Square(side)));
break;
}
case 2:
{
std::cout << "================" << std::endl;
std::cout << "Inserted: rectangle" << std::endl;
double sideA = distrFigureParam(generator);
double sideB = distrFigureParam(generator);
b.bstInsert(std::shared_ptr<Rectangle>(new Rectangle(sideA, sideB)));
break;
}
case 3:
{
std::cout << "================" << std::endl;
std::cout << "Inserted: trapezoid" << std::endl;
double sideA = distrFigureParam(generator);
double sideB = distrFigureParam(generator);
double height = distrFigureParam(generator);
b.bstInsert(std::shared_ptr<Trapezoid>(new Trapezoid(sideA, sideB, height)));
break;
}
}
};
Command cmdErase = [&]()
{
std::lock_guard<std::mutex> guard(mtx);
const double AREA = 24.0;
std::cout << "================" << std::endl;
std::cout << "Command: erase" << std::endl;
if (b.size() == 0)
{
std::cout << "================" << std::endl;
std::cout << "Stack is empty" << std::endl;
}
else
{
std::shared_ptr<Figure> first = b.front();
while (true)
{
bool isRemoved = false;
for (auto figure : b)
{
if (figure->area() < AREA)
{
std::cout << "================" << std::endl;
std::cout << "Removed" << std::endl;
figure->print();
std::cout << "Area: " << figure->area() << std::endl;
b.bstInsert(b.front());
isRemoved = true;
break;
}
}
if (!isRemoved)
break;
} }
};
Command cmdPrint = [&]()
{
std::lock_guard<std::mutex> guard(mtx);
std::cout << "================" << std::endl;
std::cout << "Command: print" << std::endl;
for (auto figure : b)
{
figure->print();
std::cout << "Area: " << figure->area() << std::endl;
}
};
while (true)
{
unsigned int action;
std::cout << "================" << std::endl;
std::cout << "Menu:" << std::endl;
std::cout << "1) Add command" << std::endl;
std::cout << "2) Erase command" << std::endl;
std::cout << "3) Execute commands" << std::endl;
std::cout << "4) Print commands" << std::endl;
std::cout << "0) Quit" << std::endl;
std::cin >> action;
if (action == 0)
break;
if (action > 4)
{
std::cout << "Error: invalid action" << std::endl;
continue;
}
switch (action)
{
case 1:
{
unsigned int commandType;
std::cout << "================" << std::endl;
std::cout << "1) Insert" << std::endl;
std::cout << "2) Erase" << std::endl;
std::cout << "3) Print" << std::endl;
std::cout << "0) Quit" << std::endl;
std::cin >> commandType;
if (commandType > 0)
{
if (commandType > 3)
{
std::cout << "Error: invalid command type" << std::endl;
continue;
}
switch (commandType)
{
case 1:
{
cmds.Push(std::shared_ptr<Command>(&cmdInsert, [](Command*){}));
cmdsNames.Push(std::shared_ptr<std::string>(new std::string("Insert")));
break;
}
case 2:
{
cmds.Push(std::shared_ptr<Command>(&cmdErase, [](Command*){}));
cmdsNames.Push(std::shared_ptr<std::string>(new std::string("Erase")));
break;
}
case 3:
{
cmds.Push(std::shared_ptr<Command>(&cmdPrint, [](Command*){}));
cmdsNames.Push(std::shared_ptr<std::string>(new std::string("Print")));
break;
}
}
}
break;
}
case 2:
{
std::cout << "================" << std::endl;
std::cout << "Front command erased" << std::endl;
cmds.Pop();
cmdsNames.Pop();
break;
}
case 3:
{
Stack<std::thread> ths;
for (auto cmd : cmds)
ths.Push(std::shared_ptr<std::thread>(new std::thread(*cmd)));
for (auto th : ths)
th->join();
break;
}
case 4:
{
std::cout << "================" << std::endl;
if (cmds.size() == 0)
{std::cout << "Commands list is empty" << std::endl;}
else {
cmdsNames2=cmdsNames;
while (cmdsNames2.size()>0) {
printf("=========\n");
std::cout << *cmdsNames2.front() << std::endl;
cmdsNames2.Pop();
}
}
break;
}
}
}
return 0;
} |
|
Добавлено через 20 часов 14 минут
К сожалению, ничего выше не заработало
Добавлено через 9 минут
Но, есть работающий пример для очереди.
| C++ |
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| case 3:
{
Queue<std::thread> ths;
for (auto cmd : cmds)
ths.push(std::shared_ptr<std::thread>(new std::thread(*cmd)));
for (auto th : ths)
th->join();
break;
} |
|
Еще пробовал так.
| C++ |
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| case 3:
{
Btree<std::thread> ths;
Btree<std::thread> th;
cmds2=cmds;
th = ths;
while(cmds2.size()>0){
ths.Insert(std::shared_ptr<std::thread>(new std::thread(cmds2)));
}
th=ths;
while(ths.size()>0){
ths.front()->join();
ths.Insert(ths.front());
} |
|
но
| Bash |
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| In file included from main.cpp:1:0:
/usr/include/c++/4.8/functional: In instantiation of ‘struct std::_Bind_simple<Stack<std::function<void()> >()>’:
/usr/include/c++/4.8/thread:137:47: required from ‘std::thread::thread(_Callable&&, _Args&& ...) [with _Callable = Stack<std::function<void()> >&; _Args = {}]’
main.cpp:251:66: required from here
/usr/include/c++/4.8/functional:1697:61: error: no type named ‘type’ in ‘class std::result_of<Stack<std::function<void()> >()>’
typedef typename result_of<_Callable(_Args...)>::type result_type;
^
/usr/include/c++/4.8/functional:1727:9: error: no type named ‘type’ in ‘class std::result_of<Stack<std::function<void()> >()>’
_M_invoke(_Index_tuple<_Indices...>)
^
make: *** [all] Error 1 |
|
Не понимаю в чем проблема
(
Сообщение от nmcf
