三、二进制编码和逻辑电路基础1.二进制编码计算机只认识二进制数,为了让人们常用的字符和十进制数为计算机所接受和识别,就必须采用某种方式,把字符和十进制数表示成二进制数,这就是字符和十进制数的二进制编码。1)二进制编码的十进制数(BCD码)常用的十进制数的二进制编码如表3—1。它的每个数码都用其对应的二进制数来表示。可见,BCD码 Third, the binary code and logic circuit 1. Binary coding computer only recognize binary numbers, in order to make people commonly used characters and decimal numbers accepted and recognized by the computer, we must adopt some way, the characters and decimal numbers expressed as a binary number This is the binary encoding of characters and decimal numbers. 1) Binary code decimal number (BCD code) Commonly used decimal number binary code as shown in Table 3-1. Each of its numbers is represented by its corresponding binary number. Visible, BCD code