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lee进来,电脑上的解释器和nc3000的得出的结果不一样~

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发表于 2007-8-29 18:43:54 | 显示全部楼层
怎么没人回答?
发表于 2007-8-29 22:15:40 | 显示全部楼层
LEE估计N久没来了
发表于 2007-8-30 15:21:57 | 显示全部楼层
LEE隐身了
发表于 2007-8-31 10:47:18 | 显示全部楼层
提示: 作者被禁止或删除 内容自动屏蔽
 楼主| 发表于 2007-8-31 13:05:10 | 显示全部楼层
引用第4楼红色激情2007-08-31 10:47发表的“”:
和机器有关,不同的机器算出来的结果不一样.
为什么??
都没有用到系统函数,都是基本语言!
发表于 2007-9-3 18:49:40 | 显示全部楼层
来了
发表于 2007-9-19 18:50:50 | 显示全部楼层
fuhaowei?
发表于 2007-9-19 20:02:32 | 显示全部楼层
问题就是:解释器有问题!
0xFFFFFFFF >> 8 以后在解释器里还是 0xFFFFFFFF
而在WQX上就是0x00FFFFFF.

而且试了一下,就连GVM2的模拟器上也有这个错误!!我就晕,但是我没彩屏机,所以我也试不了.
发表于 2007-9-21 21:05:53 | 显示全部楼层
不过CRC函数利用价值不大,算得太慢了。
发表于 2007-9-28 08:19:34 | 显示全部楼层
算术右移实现的错误么?
发表于 2007-9-28 08:21:26 | 显示全部楼层
好像没有说清楚,lava是无类型语言,右移统一为无符号右移
发表于 2007-10-3 02:35:00 | 显示全部楼层
这个是"单向"移位和"环回"移位吧, 从8楼测试的结果.
比我想的更诡异.
>>是左侧0移入的, SHR, 这个是文曲星的做法, 计算得到CRC应该是正确的.
解释器做的是右侧移出的位移入左侧, 这个是ROR, 和>>的惯例不符.
 楼主| 发表于 2007-8-29 01:45:48 | 显示全部楼层 |阅读模式
看下面这段程序
char data[]="0123456789";
long crc32_table[256]=
{
   0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
   0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
   0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
   0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
   0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
   0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
   0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
   0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
   0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
   0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
   0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
   0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
   0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
   0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
   0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
   0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
   0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
   0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
   0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
   0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
   0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
   0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
   0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
   0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
   0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
   0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
   0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
   0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
   0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
   0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
   0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
   0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
   0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
   0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
   0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
   0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
   0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
   0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
   0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
   0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
   0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
   0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
   0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
   0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
   0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
   0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
   0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
   0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
   0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
   0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
   0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
   0x2d02ef8d
};


long CRC32(long DataBuf,long len)
{
int i;
long m_CRC;
m_CRC = 0xFFFFFFFF;
for(i=0;i<len;i++)
m_CRC=crc32_table[(m_CRC^(*(DataBuf+i)))&0xff] ^ (m_CRC>>8);

return ~m_CRC;
}

void main()
{
char a,b;
ClearScreen();
Refresh();
getchar();
b=CRC32(data,10);
printf("%d",b);
getchar();
}

这段程序在电脑上的解释器得出的结果是101,而nc3000和tc800上得出的结果是198,为什么?
lee解答下~
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