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二位十进制数有100个数字0～99,其十位数和个位数都是一个十进制数字0～9。因此,一个二位十进制数可用二个十进制数字组合得到: D=10m+n其中m、n为0～9的正整数。二进制数1表示有效,0表示无效。用二进制代码可表示十进制个位数和十位数: n=0D_(09)+8D_(08)+……0D(00) m=0D_(19)+8D(18)+……+0D_(10) 其中个位二进制码D_(00)～D_(09)和十位二进制码D_(10)～D_(19)分别只有一个为1,其余均为0。例如:D_(02)=1、D_(18)=1;则n=2、m=8;即D=82。
Two decimal digits have 100 numbers from 0 to 99, and the tenth and the tenth digit are a decimal digit 0 to 9. Therefore, a two-digit decimal can be obtained by combining two decimal digits: D = 10m + n where m and n are positive integers of 0-9. Binary number 1 means valid, 0 means invalid. Decimal digits and tens digits can be expressed in binary code: n = 0D_ (09) + 8D_ (08) + ... 0D (00) m = 0D_ (19) + 8D (18) + ... + 0D_ ) One of the binary code D_ (00) ~ D_ (09) and the ten binary code D_ (10) ~ D_ (19), respectively, only one is 1, the rest are 0. For example: D_ (02) = 1, D_ (18) = 1; then n = 2, m = 8;