说明：在 STEP 7 Micro/WIN 中，可以使用 I_BCD 和 BCD_I (见 Instructions -> Convert) 指令将16位整数 (INTEGER) 转换为 BCD 码或者相反(BCD->INT)。使用下面提供的可下载的库，可以将32位整数 (DOUBLE INTEGER) 转换为 BCD 码或者相反 (BCD->DOUBLE INTEGER)。“BCD” 库的描述：“BCD.mwl” 库包...
8 0011 1000 1000 0000 1000 ?9 0011 1001 1001 0000 1001 void BcdToAscii (char *ascii_buf, const BYTE *bcd_buf, int len) { ?int i; ?char ch; ? ?for (i=0; ilen; i++) ?{ ??if (i 1) ch = *(bcd_buf++) 0x0f; ??else ch = *bcd_buf 4; ??ascii_buf[i] = ch +...
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BCD(Binary-Coded Decimal)是一种二进制编码的十进制数表示方法,其中每个十进制数字由四个二进制位表示。BCD码的优点在于它能够直接表示和处理十进制数,避免了浮点运算中的精度损失,...
prevent condition has length > 1 with := operator in data.table in R I create a data.table like this: I then try to pass it a function using := but I get condition has length > 1 error. I know this is because this is how if works. I could do something like the follo... ...
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* * To avoid consuming too much CPU time or IO resources for applying the * &struct damos->action to large memory, DAMON allows users to set time and/or * size quotas. The quotas can be set by writing non-zero values to &ms and * &sz, respectively. If the time q...
进制数C代码表示:#define BCD_TO_BIN(val) (((val) >> 4) * 10) + ((val)&15))BCD码是用4位二进制数(各个位的权重分别为:8421,所以叫8421码)来表示一位十进制数。这里的一位十进制数要特别说明下,一位十进制数只能是 0～9之间的一个数值。比如...
alter table table_name REPLICA IDENTITY { DEFAULT | USING INDEX index_name | FULL | NOTHING } 1. 2. 解释 REPLICA IDENTITY This form changes the information which is written to the write-ahead log to identify rows which are updated or deleted. ...