c语言里的sizeof 是一个计算数据存储空间大小的单目运算符,它返回数据所占的字节个数, 我们可以先来看看MSND里的定义: sizeof Operator sizeof expression The sizeof keyword gives the amount of storage, in bytes, associated with a variable or a type (including aggregate types). This keyword returns a value of type size_t. The expression is either an identifier or a type-cast expression (a type specifier enclosed in parentheses). When applied to a structure … Read more