Thread: A begginer writing a text based dungeon game.

This will be the first of many questions to come
This is an assinment so dont give me code i won't understand becouse i wont use it, even if you give me code i understand i still won't use it but i will learn from it.

in this code i am trying to get a specific number to print out when the user types n, e, s, or w.
for example: n would be 1, and e would be -1.
all it dose is give me some strange error called signal 10 (sigbus) then it pulls up a debugger window sorry if this sounds to common it's never happend to me before.

Code:

#include <stdio.h>
#include <stdlib.h>
int main(void)
{
int room0[4]={1,2,-1,-1};
char i;

char n=0;
char s=1;
char e=2;
char w=4;



printf("number...err letter:");
      scanf("%c\n",i);

printf("print the god dam numb. %i",room0[i]);


	

	return 0;
}

please before reading whats below, can you answer the above question first even if it will not help me with the game, it's how i learn things,i am very new at this got no experience at all.

as for the text base game this is how its planned, so far i am planning to have 4 rooms and am writing the code in 4 parts, 1 for each room it sounds tedius but i just want to get from 1 room to the other for right now. the rooms have numbers 0-3, you get from each room by pressing n,s,e,w. if you try to go the wrong way its a -1. i am thinking the use of arrays, if else statements and goto statment. if there is more things i should or not use don't be shy speek up.

and now for my stupid questions

1)can you get an array of letters to equal an array of numbers.
i guess that will be it for now i will post more questions as soon as they become more prevalent to the main question.

lastly you are all probably wondering what text i am using, well i am using Programming in C third edition Stephen G. Kochan Developer's Library

scanf("%c\n",&i);

so how are you going to change that code to your code?

Originally Posted by deadherorising

1)can you get an array of letters to equal an array of numbers.

what do you mean?

Originally Posted by robwhit

scanf("%c\n",&i);

so how are you going to change that code to your code?

what do you mean?

thanks, first question: i am not sure what your talking about. i hope i did it.
but i changed the code a little. now for some resign every thing equals 1
and i changed every thing to int values.

Code:

#include <stdio.h>
#include <stdlib.h>
int main(void)
{
int room0[4]={1,2,-1,-1};
int i;
int g=room0[i];
int n=0;
int s=1;
int e=2;
int w=4;

printf("number...err whatever:");
scanf("%i\n",&i);

printf("print the god dam numb. %i",g);


	

	return 0;
}

and for my stupid question,
i mean somthing like this

int room[4]={1,2,3,4}
int die[4]={'n','s','e','w'}

int die[]=room[]

and now for my second stupid question
2) can i make an array of letters equal to letsay 0-3 using the for loop.

Originally Posted by robwhit

Code:

int room0[4]={1,2,-1,-1};
int i;
int g=room0[i]; //i is not initialized.

> int die[]=room[]
what would this do?
> 2) can i make an array of letters equal to letsay 0-3 using the for loop.
you mean an array of chars?

char arr[4] = {0,1,2,3};

what do you mean i is not initialized i is initilized right above it with int i;

1) int die[]=room[], i was hoping they would equal each other i guess not, dam.

2) ya an array of chars!
"char arr[4]={0,1,2,3}"
i thought that would just ment that there are 4 places 0=0 1=1 2=2 3=3.
i want in this case n=0 s=1 e=2 w=3.

> what do you mean i is not initialized i is initilized right above it with int i;
that's declared. int i=5; is initialized.
>1) int die[]=room[], i was hoping they would equal each other i guess not, dam.
nope, have to do a loop to do that.
> i want in this case n=0 s=1 e=2 w=3.
sounds like you want a map.

like this?

arr[n] == 0
but not
arr[0] == n

there's not an easy way to do maps in C.

Originally Posted by robwhit

> what do you mean i is not initialized i is initilized right above it with int i;
that's declared. int i=5; is initialized.

why would i want it initilized, i want it declared so the user can put a letter in for it and the letter equals a number, then i want that number to one of the 4 rooms0 integer values wich will finaly spit out one of the initilized numbers from rooms0[4]. i hope.

> i want in this case n=0 s=1 e=2 w=3.
sounds like you want a map.

like this?

arr[n] == 0
but not
arr[0] == n

there's not an easy way to do maps in C.

whats the diffrence between them?
and yes kinda a map with 4 rooms.

> why would i want it initilized,

because you use its value on this line:
int g=room0[i]; //i is not initialized.
actually, I don't think you can declare an array like that with a variable though.
>i want it declared so the user can put a letter in for it and the letter equals a number,
>then i want that number to one of the 4 rooms0 integer values wich will finaly spit out one of the initilized numbers from rooms0[4]. i hope.
>whats the diffrence between them?
arrays can only take numbers in the index.
>and yes kinda a map with 4 rooms.
no not cartography, I meant the data structure map. it's like an array but you index it with one type of variable and get the corresponding one back, but of a different type than the index type. I was being confusing, sorry.

can you show what you are thinking of in code or in psuedo code?

Code:

int room0[4]={1,2,-1,-1};
int i;

int n=0;
int s=1;
int e=2;
int w=4;
int g;
printf("number...err whatever:");
scanf("%i\n",&i);

g=room0[i];

printf("print the god dam numb. %i",g);

syntactically, the above is correct. I don't know what you want it to do though.


>now i will answer you with a stupid question #3 what is psuedo code?

fake code.
if the thing is true
do the super_function
add the variable
endif

-- n | s | e | w
0| 1 | 2 |-1 | -1
1| 2 | 0 |-1 |-1
2| 0 | 1 |-1 | 3
3|-1 | -1| 2 | -1

Code:

int arr[4][4]{
{1,2,-1,-1},
{2,0,-1,-1},
{0,1,-1,3},
{-1,-1,2,-1}};

int main()

{
int i=0;
int j=0;
for (i=0;i<4; i++)
    for (j=0; j<4;j++)
        printf("%d ",arr[i][j]);
}

like that?

heres a more visual idea.
1
|
0
|
2--3

the 1 and 2 are connected

dunno what that is.

Originally Posted by Salem

> 1000 x 1000 x 30
30Mbytes of storage (at least).

But that's just the tip of the iceberg, you've got to initialise all those locations with meaningful data, unless you have a lot of

N
There is ocean here
N
There is ocean here
N
There is ocean here
N
There is ocean here
N
There is ocean here

Not only that, no user will ever visit every location in your RPG, it would simply take too long (1 room per second for almost a year, non-stop)

Your RPG will have at most a few hundred locations (that are interesting in some way). I suggest you store the connectivity of the locations within the data, then you only need to store the locations which interest you

Perhaps something like this

Code:

enum { NONE, KITCHEN, HALL, STAIRS };
enum { NORTH, SOUTH, WEST, EAST };

struct room {
    char    *name;
    int      next[4];   // N,S,W,E from this location
} rooms[] = {
    { "None" },
    { "Kitchen",    { NONE,    HALL,   NONE, NONE } },
    { "Hall",       { KITCHEN, STAIRS, NONE, NONE } },
    { "Stairs",     { HALL,    NONE,   NONE, NONE } },
};

If you have
int room_num = KITCHEN;

Moving south is just
room_num = rooms[room_num].next[SOUTH];

humm interesting i see some things but i deont see others like
were dose the north south east west become initilized, is he even using them, or is he just using the hall ,kitchen and stairs as the directions.

still this dose not answer my question, how do i make a variable equal to the index.

so i should get all the numbers to work first and add all the data first than worry about adding the north south east weast, and other descriptions later. ok thanks