taqueso fucked around with this message at 18:47 on May 8, 2009

while ((c = getopt(argc, argv, "efco:")) != -1) {
 // use optarg and c
}

./a.out -e hurr -f -o out.log blurr

optind = 4
argv[4] = hurr
argv[5] = blurr

while ((c = getopt(argc, argv, "efco:")) != -1) {
  switch (c) {
  case 'o':
    printf("the argument to -o is %s\n", optarg);
    break;
  // ... other case statements ...
  }
}

ChiralCondensate fucked around with this message at 12:46 on May 11, 2009

newsomnuke fucked around with this message at 20:02 on May 11, 2009

class Action {
public:
    virtual void Do( ) = 0;
    virtual void Undo( ) = 0;
};

class MoveAction : public Action { 
public:
    Move( int x_offset, int y_offset )
      : x_offset_(x_offset), y_offset_(y_offset) { } 
    void Do( );
    void Undo( );
private:
    int x_offset_;
    int y_offset_;
};

void MoveAction::Do( ) {

    // use x_offset_ and y_offset_ to update the game state

}

void MoveAction::Undo( ) {

    // use x_offset_ and y_offset_ to update the game state "in reverse"

}

void main( ) {

    deque<Action *> history;

    // move the player 2 in the x direction and 3 in the y direction
    Action * a = new MoveAction( 2, 3 );
    a->Do( );
    history.push_front( a );

    // now move the player 7 in the x direction and 1 in the y direction
    Action * b = new MoveAction( 7, 1 )
    b->Do( );
    history.push_front( b );

    // oh wait, we need to undo that last move
    Action * c = history.front( );
    history.pop_front( );
    c->Undo( );
    delete c;

}

BigRedDot fucked around with this message at 21:04 on May 11, 2009