对大多数的编译器来说,如果使用未初始化的指针,会将指针中存放的不确定值视为地址,然后操纵该内存地址中存放的位内容。
Under most compilers, if we use an uninitialized pointer the effect will be to use whatever bits are in the memory in which the pointer resides as if it were an address.
They are always say 32 bits or always 64 bits they do not vary in size based on what they're pointing at.
它们总是32位或者总是64位,它们的大小不会因它们所指的,内容不同而不同。
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