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原帖由 Simon 於 2013-1-4 10:52 PM 發表 P = 2 (initialize P = 2) Q = 4 (initialize Q = 4) R = 8 (initialize R = 8) P = Q + R (P = 4 + 8 = 12) Q = R - P (Q = 8 - 12 = -4) R = P + Q (R = 12 + -4 = 8) P = Q + R (P = -4 + 8 = 4) So, B