TIC-TAC-Toe Question

[edthrax]

can some tell me how to make tic tac toe program WITHOUT using array..?? and its in C.. i'm not asking for someone todo my work..just a wanted alittle help..

[quzah]

Using a single 32bit integer and bit masking, you can easily* pull this off.

#define X0 (1<< 0)
#define O0 (1<<10)
...
#define X8 (1<< 8)
#define O8 (1<<18)

long board = 0;

if( board & X0 || board & O0 )
    printf("The first spot on the board is filled by %c", board & X0 ? 'X' : 'O' );

That should get you started.

[edit] Curses! Foiled again! [/edit]

Quzah.
*Your mileage may vary.

[quzah]

Here's another amusing idea:

struct {
    char _0;
    char _1;
    char _2;
    char _3;
    char _4;
    char _5;
    char _6;
    char _7;
    char _8;
} board;

board._0 = 'X'

See, no array! You could even have fun with some pointers and use it as an array if you're so inclined. If you're really bored, use the 'offsetof' macro for added fun.

Quzah.

[confuted]

You could also do it using nine int variables and a lot of if statements...yucky. Why don't you want to use an array?

[WaltP]

Originally posted by Salem
> Why don't you want to use an array?
Because its a homework exercise I guess

Even when I was learing, instructors made no sense. I was supposed to do a CHI Square program in assembler (shudder)