用变补的方式计算X补-Y补,并判断是否溢出,如发生溢出则指明溢出类型。(16分) (1) X补=0.1100, Y补=0.0010; (2) X补=1.0101, Y补=1.1110; (3)X补=0.1100, Y补=1.0001; (4)X补=1.0101, Y补=0.1011;
用变补的方式计算X补-Y补,并判断是否溢出,如发生溢出则指明溢出类型。(16分) (1) X补=0.1100, Y补=0.0010; (2) X补=1.0101, Y补=1.1110; (3)X补=0.1100, Y补=1.0001; (4)X补=1.0101, Y补=0.1011;
参考答案和解析
利用[X-Y] 补 =[X+(-Y)] 补 =[X] 补 +[-Y] 补 来求解。 由[Y] 补 =001100,得[-Y] 补 =110100 故 [X-Y] 补 =011101+110100=010001$由[Y] 补 =111010,得[-Y] 补 =000110 故 [X-Y] 补 =000101+000110=001011$由[Y] 补 =111101,得[-Y] 补 =000011 故 [X-Y] 补 =101101+000011=110000
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