John Conway's Game Of Life
Code:
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#define YMAX 25
#define XMAX 80
#define cell fgetc(pFile)
typedef struct cell_t_ {
struct cell_t_ *neighbours[8];
int on;
} cell_t;
typedef struct world_t_ {
cell_t **array;
int width;
int height;
void *mem;
} world_t;
////////////////////
int CopyFile()
{
char inName[100];
FILE *pIn, *pOut;
int c;
//get file name from user
printf("Please enter a text file name: ");
scanf("%s", inName);
pIn = fopen(inName, "r");
//test if file exists
if(pIn == NULL)
{
printf("ERROR: cannot open file");
return 1;
abort();
}
//create new file
pOut = fopen("board.txt", "w");
//copy file contents
while((c = getc(pIn)) != EOF)
putc(c, pOut);
//close file
fclose(pIn);
fclose(pOut);
return (0);
}
void printworld(world_t *world, FILE *pOutput)
{
int x, y;
for(y = 0; y < world->height; y++) {
for(x = 0; x < world->width; x++) {
fprintf(pOutput, "%c", (world->array[y][x]).on ? 254 : ' ');
}
fputc((int)'\n', pOutput);
}
fflush(pOutput);
}
void randomizeworld(world_t *world)
{
int x, y, test;
FILE *pFile;
pFile = fopen ("board.txt", "r");
while (!feof(pFile))
{
if((test = (cell)) != 10)
{
(world->array[y][x]).on = 32;
++x;
}
if(x == XMAX) //Move X coordinate back to 0, increment Y (increasing Y ==> moving down on board)
{
x = 0;
++y;
}
}
}
void updateworld(world_t *world)
{
int x, y, i, neighbours;
for(y = 0; y < world->height; y++) {
for(x = 0; x < world->width; x++, neighbours = 0) {
for(i = 0; i < 8; i++)
if((world->array[y][x].neighbours[i]) && ((world->array[y][x]).neighbours[i]->on & 1))
neighbours++;
if((neighbours < 2) || (neighbours > 3))
(world->array[y][x]).on |= 2;
else if(neighbours == 3)
(world->array[y][x]).on |= 4;
}
}
for(y = 0; y < world->height; y++) {
for(x = 0; x < world->width; x++) {
if(world->array[y][x].on & 4)
world->array[y][x].on = 1;
else if(world->array[y][x].on & 2)
world->array[y][x].on = 0;
}
}
}
void destroyworld(world_t *world)
{
free(world->mem);
}
int createworld(world_t *world, int width, int height)
{
int i, j;
unsigned long base = sizeof(cell_t *) * height;
unsigned long rowlen = sizeof(cell_t) * width;
if(!(world->mem = calloc(base + (rowlen * height), 1)))
return 0;
world->array = world->mem;
world->width = width;
world->height = height;
for(i = 0; i < height; i++) {
world->array[i] = &world->mem + base + (i * rowlen);
}
for(i = 0; i < height; i++) {
for(j = 0; j < width; j++) {
if(j != 0) {
(world->array[i][j]).neighbours[3] = &(world->array[i][j - 1]);
}
if(i != 0) {
(world->array[i][j]).neighbours[1] = &(world->array[i - 1][j]);
}
if(j != (width - 1)) {
(world->array[i][j]).neighbours[4] = &(world->array[i][j + 1]);
}
if(i != (height - 1)) {
(world->array[i][j]).neighbours[6] = &(world->array[i + 1][j]);
}
if((i != 0) && (j != 0)) {
(world->array[i][j]).neighbours[0] = &(world->array[i - 1][j - 1]);
}
if((i != (height - 1)) && (j != (width - 1))) {
(world->array[i][j]).neighbours[7] = &(world->array[i + 1][j + 1]);
}
if((i != (height - 1)) && (j != 0)) {
(world->array[i][j]).neighbours[5] = &(world->array[i + 1][j - 1]);
}
if((i != 0) && (j != (width - 1))) {
(world->array[i][j]).neighbours[2] = &(world->array[i - 1][j + 1]);
}
}
}
return 1;
}
int main(int argc, char *argv[]) {
world_t gameoflife;
if(createworld(&gameoflife, 79, 24)) {
randomizeworld(&gameoflife);
do {
printworld(&gameoflife, stdout);
getchar();
fflush(stdin);
updateworld(&gameoflife);
}while(1);
destroyworld(&gameoflife);
}
return 0;
}
So here's the deal, I am having an issue with compiling this getting message while running it: "Unhandled exception at 0x00d71e1d in HW8.3.exe: 0xC0000005: Access violation writing location 0x00318ef8." I debugged it and can't find out why I am getting.
Thanks in advance for the help.
