A binary-coded decimal code for representing decimal numbers in which each decimal digit is represented by seven binary digits which are coefficients of8,6,4,2,0,1,0, respectively.用于表示十进制数的一种二进制编码的十进制码,其中每位十进制数用七位二进制数来表示,它们分别是8,6, 4,2, 0,1和0的系数。五-二码表如下: