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<pre align="left"><b><font face="Arial" size="4">
<font color="#FF0033">Maze search function</font>
void<font color="#FF0033"> path(void)</font>
{ <font color="#FF0099" size="3"> /* output a path through the maze if such a path exists */</font>
int i, row, col, next_row, next_col, dir, found = <font size="3">FALSE</font>;
element position;
mark[1][1] = 1; top = 0;
stack[0].row = 1; stack[0].col = 1; stack[0].dir = 1;
while ( top > -1 && !found ) {
position = delete(&top);
row = position.row; col = position.col;
dir = position.dir;
while ( dir < 8 && !found ) {
<font color="#FF0099" size="3">/*move in direction dir */</font>
next_row = row + move[dir].vert;
next_col = col + move[dir].horiz;
if ( next_row == <font size="3">EXIT_ROW </font>&& next_col == <font size="3">EXIT_COL )</font>
found = <font size="3">TRUE</font>;
else if ( !maze[next_row][next_col]
&& !mark[next_row][next_col] ) {
mark[next_row][next_col] = 1;
position.row = row; position.col = col;
position.dir = ++dir;
add(&top, position);
row = next_row; col = next_col; dir = 0;
}
else ++dir;
}
}
if ( found ) {
printf ("The path is:\n");
printf ("row col\n");
for ( i = 0; i <= top; i++ )
printf ("%2d%5d", stack[i].row, stack[i].col);
printf ("%2d%5d\n",row,col);
printf ("%2d%5d\n',EXIT_ROW,EXIT_COL);
}
else printf ("The maze does not have a path\n");
}
</font></b></pre>
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