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5.算术运算程序A.加法加法在一位机中是按位串行实现的:二对应位相加求得“和”S和“进位”C.显然二相应位相加时必须一并考虑低位的进位,这就是“全加”.全加真值表如表1所示.
5. Arithmetical operation program A. Adder and addition in a bit by bit serial implementation: the sum of the two corresponding bits to find “and ” S and “Carry ” C. Obviously when the two corresponding bits add Must take into account the low carry, which is All plus truth table shown in Table 1.