输入 输出 A B A>B A=B A<B 0 0 1 0 0 1 0 0 1 1 0 0 0 0 1 0 “A>B”=AB “A=B”=AB+AB “A<B”=AB 输入 输出 A B A>B A=B A<B 0 0 0 1 0 0 1 0 0 1 1 0 1 0 0 1 1 0 1 0 “A  B” = AB “A = B” = AB + AB “A  B” = AB