C++ :: Constructing Text Adventure - World Class To Hold Objects From Character
Jun 19, 2014
I am working with a new text adventure. The way i want to construct it is by having a class for all living things. in the class you have basic things as: health, gold, vector for inventory holding "struct item". etc...
There is also a class called world, wich navigates through the world.
World class contains of: player location, and a map containing info about the room etc...
Here comes the problem. I want there to be characters to be placed out in different maps, so basically i want the world class to hold objects from Character.
How to do it. In world class i made a map...
std::map<int,"content">
content is a struct i made above in world class:
struct content{
std::string name; // location name
std::string info; // info about location
std::vector<Character>characters;
std::vector<item>items;
};
To sum it up, i have a std::map<int,content>map the int stands for location id. Content holds more info about the room and what's in it
btw the classes are in different files and that means i have to include "Character.h" in the world file so i can set up the vector of characters.
Using SFML, I had a Board class which held multiple vectors of all of my object types in the game, and then it also held a vector of pointers to the memory addresses of these object instances, like this
class Board{ //... std::vector<AbstractObject*> GetAllLevelObjects(){ return allLevelObjects; } //so these are used to hold my object instances for each level
[Code]....
When looping through this vector and drawing the sprites of the objects, I get the runtime error 0xC0000005: Access violation reading location 0x00277000. I solved this error by storing the vector of pointers in the class that holds my Board instance, but I'm wondering why only this solution worked? Why couldn't I just have my vector of pointers in the same class that the instances of those objects were in?
I'm trying to create a sort of text-adventure game, but rather than having to check for the input being uppercase or lowercase, I'd rather convert it before checking it in an if statement.
I've created a function, and I know it works because when I print the output, it shows up capitalized, however when I check it with an if statement, it doesn't pass.
Here is my code:
#include <iostream> using namespace std; void stringUppercase(string x) { int i; for (i = 0; i < x.length(); i++) {
This has been bothering me for a while now, and I finally put together an example:
#include <iostream> #include <string> using namespace::std;
[Code]....
In the code above, the two classes hold pointers to each other, and that's fine but it doesn't seem right since C++ prefers to pass by reference. Yes, it can still do that (see testbox and testball) but even that seems odd to me because still you need to use pointer notation for the enclosed object. Am I the only one who feels this way, and should I just get over it? Or am I missing something that would allow an object to hold a reference?
What I want to do with the below code is to construct the vector containing 'Ability' objects in the class 'Card'. I have searched for the solution in the past, and have been unsuccessful, mainly because the vector contains child classes of the parent class 'Ability'. The below code is a snippet of the larger program that I am working on, and should compile:
As you can see, in the class 'Card' I have a pretty large constructor. Up to this point, however, I have failed in my attempts to construct the abilities vector, because it contains those child classes.
I need to a simple example for writing class' objects to a text file using fstream , I tried to search the forums and I found binary examples but not for to a text file.
How would I use the list container to hold a class?
class A { private : int x; public : void setX(int val) { x = val; } };
class B { private : std::list<A> pdata; public : void addToList(); };
For adding, I thought of trying something like
void B::addToList() { A *tmp = new A; if(A != 0) { tmp->setX(5); pdata.insert(tmp); delete tmp; } }
How would I do what I'm trying to do? Or is this the wrong way to go about it? For the actual program, "B" would contain several lists of various classes.
I have an abstract class named Terrain, and a class named RoadMap, which supposed to hold an N*N array of Terrains. But I'm not sure what type should the RoadMap class hold:
Code: #ifndef TERRAIN_H #define TERRAIN_H class Terrain {
[Code] ....
I can't use an array of refernces here, so I tried this:
Code: Terrain** terrain; and then I thought this was the way to go:
Code: Terrain (*terrain)[]; But now I'm not sure.
The N*N matrix size supposed to be determined according to a given input... What type should I use there?
Double values are stored in text file. 23.5 36.8 34.2 ... My teacher told me to read them character by character and then make words, like i have to read "2" "3" "." "5" and now have to make it or treat it as word and then using atoi(). I have to convert it into double. but i dont know how to do this....
In this book, item 3 is about never treat arrays polymorphically. In the latter part of this item, the author talks about the result of deleting an array of derived class objects through a base class pointer is undefined. What does it mean? I have an example here,
Code: class B { public: B():_y(1){} virtual ~B() { cout<<"~B()"<<endl;
[Code] ....
This sample code does exactly what I want. So does the author mean the way I did is undefined?
#include <iostream> using namespace std; class superclass; class subclass1; class subclass2;
[Code] ....
As you can see I want to create a dynamically allocated storage of references to a parent class each of which can then point to a child class, how ever I do not know how to extract the child class out again from that array so i may access its variable b.
Let's say I have a Car object , and it contains inner Engine object.
Code: struct Car{ Engine mEngine; };
In order to initialize the engine object NOT by the default constructor (if it has any) , we use initialization semantics:
Code: Car::Car: mEngin(arg1,arg2,...) { other stuff here }
Now it gets tricky: Let's say a Car objects has 10 inner objects, each object has about 5 variables in it . Car is a base class for , e.g. , Toyota class. you don't want the Car class to have a constructor with 50 arguments. Can the inner objects of Car be initialized from the base class , e.g. Toyota?
Code: class Toyota: Car(...), mEngine(...), mGear(..) { ... };
The other options are: 1) like said , create a Car constructor which gets 50 arguments, then initialize Car as whole from Toyota - the code becomes less readable and less intuitive 2) Car constructor which get built-objects as arguments and initialize the inner objects with copy constructor . the code gets more readable but then you create many excess objects .
I am making an open world RPG game. I have already done the graphics rendering (with directx 11 on windows 8). I am a bit confused of how to load all of this data in, and I looked into how the game Skyrim did it. I didn't find much information about it at all, apart from it uses cells for each bit of the game, and if you character were to kick a pumpkin (for example) it would record the new location in the player's save file. The same goes for spells, perks, quests, etc.
My problem is, I'm not sure how to implement something similar in code!
In file included from /usr/include/cairomm-1.0/cairomm/fontoptions.h:26:0, from /usr/include/cairomm-1.0/cairomm/surface.h:37, from /usr/include/gdkmm-3.0/gdkmm/pixbuf.h:40, from /usr/include/gdkmm-3.0/gdkmm/dragcontext.h:31, from /usr/include/gtkmm-3.0/gtkmm.h:90, from main.cpp:1: /usr/include/cairo/cairo-ft.h:50:35: fatal error: fontconfig/fontconfig.h: No such file or directory #include <fontconfig/fontconfig.h>
Write your question here. Hello World not working they say 1>------ Build started: Project: HelloWorld1, Configuration: Debug Win32 ------ 1>LINK : fatal error LNK1123: failure during conversion to COFF: file invalid or corrupt ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
I used this video [URL] ....
#include <iostream> using namespace std; int main(){ cout <<"Hello World! " << endl; return 0; }
i have read a lot of about lists but i dont understand this. I know its something like dogs on leash where we have
dog1->dog2->dog3->.... and Code: struct DOG {char* (name of a dog of first leash) DOG* (next dog ) } I have written something like this but this doesnt work as i wanted Code: #include <iostream> using namespace std; struct line {
[Code]....
I wanted to make program where i can type XX numbers , then cout those numbers without changing the order, and my next exercise is to change order in this programme from end to start.
I'm attempting to build a column based database, and I'm new to C++ (just wanted to play around with building a column base database "for the fun of it"). I want to construct a very fast radix sort, that would allow me to quickly sort groups of columns based on integer values. My general preference is to take up more RAM to get more performance.
I'd like to build the radix sort by allowing 256 "buckets" to drop values in as I'm sorting. This allows me to sort through a group of 4 byte integers in only 4 passes. But assuming I'm trying to sort a large group of values (say 50+ million), I'm not sure what type of container to use for these. Also note I'm pretty unfamiliar with the "standard library", so below are my thoughts:
Vectors: -Pros: Easy to use, and very fast for sequential and random access inserts / reads -Cons: If they have to dynamically resize because a given vector wasn't large enough, this can apparently really slow performance. Unless I make another pass over the numbers before I start sorting, I wouldn't know how big to make individual the individual vectors. This means I either have to make them "too big" and waste space, or pay a performance price for either resizing, or scanning data first.
Lists: -Pros: Seems like I wouldn't have to specify size ahead of time, so I could just easily insert values to a given list. Also, since I don't need random access reads (I'll ready the "0" list sequentially, then the "1" list, etc. they should work fine. -Cons: I don't really know much about lists, but I'm not sure how easy it is to append a new value to the end of a list. I've read that standard library lists include both "forward" and "backward" pointers, which I don't need. Also, I find it hard to believe that there isn't some time taken up with memory allocation. If I build a list and append x million records in it, is it calling memory allocation routines x million times?
Or maybe there's another container type I should learn?
Again, my goal is to make this "fast", not "memory efficient". But having said that, the fastest way I could think of (use 256 vectors, each sized equal to the total number of members to be sorted) is just too much memory to burn - 256 times a vector big enough to hold millions of elements is too much.
Every time the timer clicks it should show a text letter like (T) for tortoise and (H) for hare that moves around the board when the user hits go on the GUI.
I have been working on an assignment where I have to add three objects of a class Matrix. The class should have the flexibility to add more than two oprands without changing any operand on Left hand side of the '=' operator.
I need an array of class objects but am unsure of how one might accomplish this. I have so far...
//element class driver code Element Arsenic(lowCeiling, highCeiling); Element Cadmium(lowCeiling, highCeiling); Element Chromium(lowCeiling, highCeiling); Element Copper(lowCeiling, highCeiling); Element Lead(lowCeiling, highCeiling); Element Nickel(lowCeiling, highCeiling); Element Molybdenum(lowCeiling, highCeiling); Element Mercury(lowCeiling, highCeiling); Element Selenium(lowCeiling, highCeiling); Element Zinc(lowCeiling, highCeiling);
I'm new in programming, and trying to write a code in C. The requirement is following - to write a text, and to find frequency of 1 chosen character in it. The main thing is that program should check user input (for example, I want to check if user entered "char" --> then correct, or if entered "int" --> not correct). But the program still doesn't check. So I have:
Code: #include <stdio.h> int main(){ char c[1000], ch; char i, count=0; printf("Enter a text: "); gets(c);
