RCRPG/C++

From Rosetta Code
< RCRPG
Revision as of 22:08, 18 February 2014 by rosettacode>Spoon!
RCRPG/C++ is part of RCRPG. You may find other members of RCRPG at Category:RCRPG.

Commands

  • north, south, east, west, up, down moves.
  • n, s, e, w, u, d are aliases for the above.
  • attack <dir> to break down walls. You need to have a sledge equipped.
  • take <item> to take an item.
  • take all to take everything in the room.
  • drop <item> to drop an item.
  • drop all to drop everything.
  • equip <item> to equip something from your inventory.
  • wield <item> is an alias for equip.
  • unequip to return what you're wielding to your inventory.
  • name <string> to name a room.
  • alias <word> <word> to create an alias.
  • inventory, inv, i to see what you have.
  • look to see the full room description again.

Code

Works with: C++11
Works with: Visual Studio 2010

<lang cpp>#include <map>

  1. include <set>
  2. include <ctime>
  3. include <cctype>
  4. include <string>
  5. include <random>
  6. include <sstream>
  7. include <iostream>
  8. include <algorithm>
  9. include <functional>

using namespace std;

mt19937 rnd_engine((unsigned long)time(NULL)); uniform_real_distribution<double> rnd_distribution; auto rnd = bind(rnd_distribution, rnd_engine);

typedef function<void (stringstream&)> action;

map<string, action> actions; map<string, string> unalias;

void canonical(string &s) { 

 transform(s.begin(), s.end(), s.begin(), tolower);
 
 while(unalias.find(s) != unalias.end())
   s = unalias[s];

}

class position { public: 

 int x, y, z;    // north-south, east-west, up-down

 position(): x(0), y(0), z(0) {}

 bool operator<(const position &p) const
 {
   if(x < p.x)
     return true;
   if(x > p.x)
     return false;
   if(y < p.y)
     return true;
   if(y > p.y)
     return false;
   if(z < p.z)
     return true;
   if(z > p.z)
     return false;
   return false;
 }

};

position playerPos;

class directionSet { public: 

 set<string> directions;

 bool isOpen(string dir) const
 {
   return directions.find(dir) != directions.end();
 }

 bool open(string dir)
 {
   if(directions.find(dir) != directions.end())
     return false;

   directions.insert(dir);
   return true;
 }

 vector<string> list() const
 {
   vector<string> out;
   set<string>::const_iterator iter;
   for(iter = directions.begin(); iter != directions.end(); ++iter)
     out.push_back(*iter);
   return out;
 }

};

class itemSet { public: 

 map<string, int> counts;
 
 int count(string item)
 {
   if(counts.find(item) == counts.end())
     return 0;
   return counts[item];
 }

 void add(string item, int number = 1)
 {
   counts[item] += number;
 }

 bool remove(string item)
 {
   if(counts.find(item) == counts.end() || counts[item] == 0)
     return false;

   --counts[item];
   return true;
 }

 void clear()
 {
   counts.clear();
 }

 int transferAll(itemSet &other)
 {
   int total = 0;

   map<string, int>::iterator iter;
   for(iter = counts.begin(); iter != counts.end(); ++iter)
   {
     other.add(iter->first, iter->second);
     total += iter->second;
   }

   counts.clear();
   return total;
 }

 void describe(bool vertical = true) const
 {
   bool any = false;
   map<string, int>::const_iterator iter;
   for(iter = counts.begin(); iter != counts.end(); ++iter)
   {
     if(iter->second == 0)
       continue;

     any = true;

     if(vertical)
       cout << "  ";
     else if(iter != counts.begin())
       cout << ", ";

     if(iter->second == 1)
       cout << "a " << iter->first;
     else
       cout << iter->second << " " << iter->first << "s";

     if(vertical)
       cout << endl;
   }

   if(!any)
     if(vertical)
       cout << "  nothing" << endl;
     else
       cout << "nothing";
 }

};

int sledgeCount = 0;

class room { public: 

 bool visited;
 itemSet items;
 directionSet exits;
 string name;

 room()
 {
   visited = false;
   name = "";

   if(rnd() < 0.25)
   {
     items.add("sledge");
     sledgeCount++;
   }
   if(rnd() < 0.1)
     items.add("ladder");
   while(rnd() < 0.1)
     items.add("gold");
 }

 void describe(bool full = true)
 {
   visited = true;
   cout << endl;

   if(full)
   {
     cout << "You are in a small room";

     if(name == "")
       cout << " at (" << playerPos.x << ", " << playerPos.y << ", " << playerPos.z << "). ";
     else
       cout << ". You remember this room as " << name << ". ";

     vector<string> e = exits.list();
     if(e.size() == 0)
       cout << "There are no exits here. ";
     else if(e.size() == 1)
       cout << "There is an exit to the " << e[0] << ". ";
     else
     {
       cout << "There are exits to the ";
       for(size_t i = 0; i < e.size(); ++i)
       {
         if(i == e.size() - 1)
           cout << " and ";
         else if(i != 0)
           cout << ", ";
         cout << e[i];
       }
       cout << ". ";
     }

     cout << "You see ";
     items.describe(false);
     cout << " on the floor." << endl;
   }
   else
   {
     if(name == "")
       cout << "(" << playerPos.x << ", " << playerPos.y << ", " << playerPos.z << ")" << endl;
     else
       cout << name << ":" << endl;

     vector<string> e = exits.list();
     if(e.size() == 0)
       cout << "No exits. ";
     else
     {
       cout << "Exits: ";
       for(size_t i = 0; i < e.size(); ++i)
       {
         if(i != 0)
           cout << ", ";
         cout << e[i];
       }
       cout << "." << endl;;
     }

     cout << "Items: ";
     items.describe(false);
     cout << "." << endl;
   }
 }

};

map<position, room> rooms; itemSet playerInv; string equipped = "";

void north(stringstream &ss) { 

 if(rooms[playerPos].exits.isOpen("north"))
 {
   playerPos.x++;
   rooms[playerPos].describe(!rooms[playerPos].visited);
 }
 else
   cout << "There's a wall in your way." << endl;

}

void south(stringstream &ss) { 

 if(rooms[playerPos].exits.isOpen("south"))
 {
   playerPos.x--;
   rooms[playerPos].describe(!rooms[playerPos].visited);
 }
 else
   cout << "There's a wall in your way." << endl;

}

void east(stringstream &ss) { 

 if(rooms[playerPos].exits.isOpen("east"))
 {
   playerPos.y++;
   rooms[playerPos].describe(!rooms[playerPos].visited);
 }
 else
   cout << "There's a wall in your way." << endl;

}

void west(stringstream &ss) { 

 if(rooms[playerPos].exits.isOpen("west"))
 {
   playerPos.y--;
   rooms[playerPos].describe(!rooms[playerPos].visited);
 }
 else
   cout << "There's a wall in your way." << endl;

}

void up(stringstream &ss) { 

 if(rooms[playerPos].items.count("ladder") == 0)
   cout << "There's no ladder here." << endl;
 else if(rooms[playerPos].exits.isOpen("up"))
 {
   playerPos.z++;
   rooms[playerPos].describe(!rooms[playerPos].visited);
 }
 else
   cout << "There's a ceiling in your way." << endl;

}

void down(stringstream &ss) { 

 if(rooms[playerPos].exits.isOpen("down"))
 {
   playerPos.z--;
   rooms[playerPos].describe(!rooms[playerPos].visited);
 }
 else
   cout << "There's a floor in your way." << endl;

}

void attack(stringstream &ss) { 

 if(equipped != "sledge")
 {
   cout << "You're not weilding a sledge." << endl;
   return;
 }

 string dir, opp = "";
 ss >> dir;
 canonical(dir);

 position otherPos = playerPos;

 if(dir == "north")
 {
   opp = "south";
   otherPos.x++;
 }
 else if(dir == "south")
 {
   opp = "north";
   otherPos.x--;
 }
 else if(dir == "east")
 {
   opp = "west";
   otherPos.y++;
 }
 else if(dir == "west")
 {
   opp = "east";
   otherPos.y--;
 }
 else if(dir == "up")
 {
   opp = "down";
   otherPos.z++;
 }
 else if(dir == "down")
 {
   opp = "up";
   otherPos.z--;
 }

 if(opp == "")
   cout << "You swing in a fifth direction, and hit nothing." << endl;
 else if(!rooms[playerPos].exits.open(dir))
   cout << "There's already a hole there." << endl;
 else
 {
   rooms[otherPos].exits.open(opp);

   if(dir == "up")
     dir = "ceiling";
   else if(dir == "down")
     dir = "floor";
   else
     dir += " wall";

   cout << "You hammer away at the " << dir << " and make a big hole." << endl;

   if(rnd() < 0.166 && sledgeCount > 1)
   {
     equipped = "";
     cout << "Your sledge breaks!" << endl;
     sledgeCount--;
   }
 }

}

void drop(stringstream &ss) { 

 string item;
 ss >> item;
 canonical(item);

 if(item == "all")
 {
   int n = playerInv.transferAll(rooms[playerPos].items);
   if(n == 0)
     cout << "You don't have anything to drop." << endl;
   else
     cout << "You drop all your stuff on the floor." << endl;
 }
 else if(!playerInv.remove(item))
   cout << "You don't have a " << item << "." << endl;
 else
 {
   rooms[playerPos].items.add(item);
   cout << "You drop a " << item << "." << endl;
 }

}

void take(stringstream &ss) { 

 string item;
 ss >> item;
 canonical(item);

 if(item == "all")
 {
   int n = rooms[playerPos].items.transferAll(playerInv);
   if(n == 0)
     cout << "You don't see anything to take." << endl;
   else
     cout << "You take everything not nailed down." << endl;
 }
 else if(!rooms[playerPos].items.remove(item))
   cout << "You don't see a " << item << " here." << endl;
 else
 {
   playerInv.add(item);
   cout << "You take a " << item << "." << endl;
 }

}

void inventory(stringstream &ss) { 

 cout << "You are weilding " << (equipped == "" ? "nothing" : "a " + equipped) << "." << endl;
 cout << "You are carrying:" << endl;
 playerInv.describe();

}

void name(stringstream &ss) { 

 string newName;
 getline(ss, newName);
 rooms[playerPos].name = newName.substr(1);
 cout << "You'll always remember this room as" << newName << "." << endl;

}

void equip(stringstream &ss) { 

 string item;
 ss >> item;
 canonical(item);

 if(!playerInv.remove(item))
   cout << "You don't have a " << item << " to equip." << endl;
 else if(equipped != "")
 {
   cout << "You unequip your " << equipped << " and wield a " << item << "." << endl;
   playerInv.add(equipped);
   equipped = item;
 }
 else
 {
   cout << "You equip a " << item << "." << endl;
   equipped = item;
 }

}

void unequip(stringstream &ss) { 

 if(equipped == "")
   cout << "You don't have anything equipped." << endl;
 else
 {
   cout << "You stop weilding the " << equipped << "." << endl;
   playerInv.add(equipped);
   equipped = "";
 }

}

void alias(stringstream &ss) { 

 string from, to;
 ss >> from >> to;

 if(actions.find(from) == actions.end() && unalias.find(from) == unalias.end() && 
   from != "gold" && from != "sledge" && from != "ladder")
   cout << "I don't understand " << from << "." << endl;
 else if(actions.find(to) != actions.end() || unalias.find(to) != unalias.end() || 
   to == "gold" || to == "sledge" || to == "ladder")
   cout << "Can't redefine words." << endl;
 else
 {
   unalias[to] = from;
   cout << "Ok." << endl;
 }

}

void look(stringstream &ss) { 

 rooms[playerPos].describe();

}

int main() { 

 actions["north"] = north;
 actions["south"] = south;
 actions["east"] = east;
 actions["west"] = west;
 actions["up"] = up;
 actions["down"] = down;
 actions["attack"] = attack;
 actions["drop"] = drop;
 actions["take"] = take;
 actions["equip"] = equip;
 actions["unequip"] = unequip;
 actions["inventory"] = inventory;
 actions["name"] = name;
 actions["alias"] = alias;
 actions["look"] = look;

 unalias["inv"] = "inventory";
 unalias["i"] = "inventory";
 unalias["n"] = "north";
 unalias["s"] = "south";
 unalias["e"] = "east";
 unalias["w"] = "west";
 unalias["u"] = "up";
 unalias["d"] = "down";
 unalias["wield"] = "equip";

 rooms[playerPos].items.clear();
 rooms[playerPos].items.add("sledge");
 sledgeCount = 1;

 cout << "Welcome to RCRPG, C++ edition. Find your way to (1, 1, 5) to get the treasure and win the game." << endl;

 stringstream dummy;
 look(dummy);

 while(true)
 {
   string input, command;

   cout << "> ";
   getline(cin, input);

   stringstream ss(input);
   ss >> command;

   canonical(command);

   if(actions.find(command) != actions.end())
     actions[command](ss);
   else if(command == "quit")
   {
     cout << "Bye." << endl;
     break;
   }
   else
     cout << "I don't understand." << endl;

   if(playerPos.x == 1 && playerPos.y == 1 && playerPos.z == 5)
   {
     cout << "You made it! And there's the treasure! It's beautiful!" << endl;
     break;
   }
 }

}</lang>

Retrieved from "https://rosettacode.org/wiki/RCRPG/C%2B%2B?oldid=201958"