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<div id="Layer1" style="position:absolute; width:711px; height:21px; z-index:1; top: 10px; background-color: #CCCCCC; layer-background-color: #CCCCCC; border: 1px none #000000; left: 26px"><b>|</b><font face="宋体" size="2"><a href="../text1/text1-0.htm">第一章</a></font><b>|</b><font face="宋体" size="2"><a href="../text2/text2-0.htm">第二章</a></font><b>|</b><font face="宋体" size="2">第三章</font><b>|</b><font face="宋体" size="2"><a href="../text4/text4-0.htm">第四章</a></font><b>|</b><font face="宋体" size="2"><a href="../text5/text5-0.htm">第五章</a></font><b>|</b><font face="宋体" size="2"><a href="../text6/text6-0.htm">第六章</a></font><b>|</b><font face="宋体" size="2"><a href="../text7/text7-0.htm">第七章</a></font><b>|</b><font face="宋体" size="2"><a href="../text8/text8-0.htm">第八章</a></font><b>|</b><font face="宋体" size="2"><a href="../text9/text9-0.htm">第九章</a></font><b>|</b><font face="宋体" size="2"><a href="../text10/text10-0.htm">第十章</a></font><b>|</b><font size="2" face="宋体"><a href="../textA/textA-0.htm">算法分析</a><b><font color="#000000">|</font></b>
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<pre align="left"><b><font face="Arial" size="4">
#define MAX_STACK_SIZE 100 /* maximum stacksize */
typedef struct {
short int row;
short int col;
short int dir;
} element;
element stack[ MAX_STACK_SIZE ];
<font color="#FF0099">
Initial maze algorithm</font>
<i>initialize a stack to the maze's entrance coordinates
and direction to north;</i>
while ( stack is not empty ) {
<i><font size="3" color="#FF0099">/* move to position at top of stack */</font></i>
<row, coil, dir> = delete from top of stack;
while ( there are more moves from current position )
<next_row, next_col> = coordinates of next move;
dir = direction of move;
if ( (next_row == EXIT_ROW) && (next_col == EXIT_COL) )
success;
if ( maze[next_row][next_col] == 0 &&
mark[next_row][next_col] == 0 ) {
<font color="#FF0099"><i><font size="3">/* legal move and haven't been there */</font></i></font>
mark[next_row][next_col] = 1;
<i><font size="3" color="#FF0099">/* save current position and direction */</font></i>
add <row,col,dir> to the top of the stack;
row = next_row;
col = next_col;
dir = north;
}
}
}
printf("No path found\n");
</font></b></pre>
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