命令模式

#include <iostream>
#include <vector>
#include <memory>
class print_files_receiver {
public:
    void print_common_files() {
        std::cout << "print common files" << std::endl;
    }
    void print_special_files() {
        std::cout << "print special files" << std::endl;
    }
};
class print_command {
public:
    print_command(print_files_receiver *ptr) : receiver_(ptr) {
    }
    virtual ~print_command() = default;
public:
    virtual bool execute() = 0;
protected:
    print_files_receiver *receiver_ = nullptr;
};
class print_common_files_command : public print_command {
public:
    print_common_files_command(print_files_receiver *receiver) : print_command(receiver) {
    }
public:
    virtual bool execute() {
        receiver_->print_common_files();
    }
};
class print_special_files_command : public print_command {
public:
    print_special_files_command(print_files_receiver *receiver) : print_command(receiver) {
    }
public:
    virtual bool execute() {
        receiver_->print_special_files();
    }
};
class office_worker {
public:
    void set_command(print_command *command) {
        missions.emplace_back(command);
    }
    void notify() {
        for (auto cmd : missions) {
            cmd->execute();
        }
    }
private:
    std::vector<print_command *>missions;
};
int main() {
    print_files_receiver receiver;
    print_command *print_common_file_command = new print_common_files_command(&receiver);
    print_command *print_special_file_command = new print_special_files_command(&receiver);
    office_worker worker;
    worker.set_command(print_common_file_command);
    worker.set_command(print_special_file_command);
    worker.notify();
    delete print_common_file_command;
    delete print_special_file_command;

    return 0;
}