40> <<A:16>> = <<1,2>>.
<<1,2>>
41> <<B:16/bits>> = <<1,2>>.
42> <<A:16>> = << B:16/bits>>.//-----------數值相等的兩個變量相等--------------------------------------------
43> <<A:16>> = << A:16/bits>>. //-----------同一變量缺少預設值機關的和帶上預設值機關的不相等。--------------------------------------------
** exception error: bad argument
44> <<A:16/bits>> = << A:16/bits>>.
45> <<A:16>> = << A:16>>.
46> <<B:16>> = <<B:16>>.
47> <<B:16/bits>> = <<B:16>>.
48> <<B:16>> = <<B:16/bits>>.
** exception error: no match of right hand side value <<1,2>>
49> <<B:2/unit:8>> = <<B:16/bits>>.
50> <<C:2/unit:8>> = <<B:16/bits>>.
51> <<D:1/unit:16>> = <<B:16/bits>>.
