基本解釋空指針值英漢例句雙語例句This marker is usually called the null value, the null list, or the null pointer.這個(gè)標(biāo)記通常稱作空值（null value）、空列表（null list）或者空指針（null pointer）。That means a reference type can have a null pointer, but a value type cannot have a null value.這意味著引用類型可能有空指針，但是數(shù)值類型不能有空值。This is because the compiler has to preserve the value of the null pointer through all conversions.使用引用作爲(wèi)函數(shù)的蓡數(shù)可能比使用指針更有傚率。null pointer value更多例句專業(yè)釋義計(jì)算機(jī)科學(xué)技術(shù)零指示字值空指標(biāo)值