subject_31976.htm

vc

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序号：31976 发表者：王利 发表日期：2003-03-08 23:14:52
<br>主题：请教二文件中数据的查找
<br>内容：大家好，请帮一个忙，我想问一下，我打开一个二进制文件，想查找出里边的数据比如47或者5b，应该怎么查找，是直接判断BYTE型的数组里边的数据是47，还是要把他们转换为别的数字，请告诉我，最好用代码表示，谢谢
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回复者：tiger_bai 回复日期：2003-03-09 10:44:51
<br>内容：Open 文件 然后再Seek查找相匹配的数据！！
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<font color=red>答案被接受</font><br>回复者：Justin Le 回复日期：2003-03-09 12:56:02
<br>内容：#include &lt;stdio.h&gt;<BR><BR>FILE *stream, *stream2;<BR><BR>void main(int argc, char ** argv )<BR>{<BR>&nbsp;&nbsp; int buffer[8000];<BR>&nbsp;&nbsp; int&nbsp;&nbsp;i, ch;<BR>&nbsp;&nbsp; int find;<BR>&nbsp;&nbsp; if(argc &lt;2){ printf("语法: %s %s",argv[0],argv[1]);return;}<BR>&nbsp;&nbsp; sscanf(argv[1],"%x",&amp;find);<BR>&nbsp;&nbsp;&nbsp;&nbsp;printf("Begin seeking %x ...\n",find);<BR><BR>&nbsp;&nbsp; if( (stream&nbsp;&nbsp;= fopen( "data", "rb" )) == NULL )<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;printf( "The file 'data' was not opened\n" );<BR>&nbsp;&nbsp; else<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;printf( "The file 'data' was opened\n" );<BR><BR><BR>&nbsp;&nbsp; ch = fgetc( stream );<BR>&nbsp;&nbsp; for( i=0; (i &lt; 80 ) &amp;&amp; ( feof( stream ) == 0 ); i++ )<BR>&nbsp;&nbsp; {<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;buffer[i] = (int)ch; <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if(buffer[i] == find){ printf("%x FOUND POS:%d\n",find,i);}<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/*if (buffer[i] &gt;16)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;printf("%x ",buffer[i]);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;printf("0%x ",buffer[i]);*/<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ch = fgetc( stream );<BR>&nbsp;&nbsp; }<BR><BR><BR>&nbsp;&nbsp; /* Add null to end string */<BR>&nbsp;&nbsp; <BR>&nbsp;&nbsp; <BR><BR>&nbsp;&nbsp; if( fclose( stream ) )<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;printf( "The file 'data' was not closed\n" );<BR><BR><BR>}<BR>
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回复者：Justin Le 回复日期：2003-03-09 12:58:50
<br>内容：运行前建立一个DATA文件，比如是 <BR>1234567890123abcd<BR>qwertyuioplkjm,..<BR>然后命令行下<BR>myprogram 30<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;^16进制的数
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