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// Original file by Jay Chan: | |
// https://gist.github.com/justecorruptio/9967738 | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <unistd.h> | |
#include <time.h> | |
#define SIDE 4 | |
#define GRID (SIDE * SIDE) | |
int M[GRID]; | |
int W; | |
int K[] = { 2, 3, 1, 0 }; | |
int | |
cell (int d, int i, int j) | |
{ | |
if (d <= 0) { | |
return SIDE * i + j; | |
} | |
return cell (d - 1, j, SIDE - 1 - i); | |
} | |
void | |
draw (int f, int d) | |
{ | |
int k, i = SIDE, j, l, P; | |
for (; i--;) { | |
j = k = l = 0; | |
for (; k < SIDE;) { | |
if (j < SIDE) { | |
P = M[cell (d, i, j++)]; | |
W |= P >> 11; | |
l *P && (f ? M[cell (d, i, k)] = l << (l == P) : 0, k++); | |
l = l ? (P ? (l - P ? P : 0) : l) : P; | |
} | |
else { | |
f ? M[cell (d, i, k)] = l : 0; | |
++k; | |
W |= 2 * !l; | |
l = 0; | |
} | |
} | |
} | |
} | |
void | |
step () | |
{ | |
int k, i = GRID + rand () & (GRID - 1); | |
for (; M[i & (GRID - 1)] * i; i--); | |
i ? M[i & (GRID - 1)] = 2 << (rand () % 2) : 0; | |
W = i = 0; | |
for (; i < SIDE; i++) { | |
draw (0, i); | |
} | |
// print the tiles onto the terminal | |
i = GRID; | |
puts ("\e[2J\e[H"); | |
for (; i--;) { | |
if (M[i]) { | |
printf ("%4d|", M[i]); | |
} else { | |
printf ("%s", " |"); | |
} | |
if (0 == (i % SIDE)) { | |
putchar ('\n'); | |
} | |
} | |
if (!(W - 2)) { | |
// read input from keyboard | |
read (0, &k, 3); | |
draw (1, K[(k >> 16) & 3]); | |
step (); | |
} | |
} | |
int | |
main (void) | |
{ | |
// clear the screen in preparation for the game | |
system ("stty cbreak"); | |
/* intialize random number generator */ | |
srand ((unsigned) time (NULL)); | |
step (); | |
// game has finished by this point | |
puts (W & 1 ? "Won" : "Lost"); | |
return 0; | |
} | |
//[2048] |
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