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null pointer value造句

"null pointer value"是什么意思   

例句與造句

  1. A " null pointer value " explicitly points to no valid location.
  2. Dereferencing a null pointer value is undefined, often resulting in a segmentation fault.
  3. Unless otherwise specified, static objects contain zero or null pointer values upon program startup.
  4. Fixes for potential VCS commit logs ( including explicit assignments of NULL pointer values ).
  5. In conditional contexts, null pointer values evaluate to false, while all other pointer values evaluate to true.
  6. It's difficult to find null pointer value in a sentence. 用null pointer value造句挺難的
  7. This means that, for example, a pointer to 0 is never a valid pointer and can be used as a special null pointer value.
  8. The not frequently used page-replacement algorithm generates fewer page faults than the least recently used page replacement algorithm when the page table contains null pointer values.
  9. Null pointer values are useful for indicating special cases such as no " next " pointer in the final node of a linked list, or as an error indication from functions returning pointers.
  10. Because the C language does not specify an implicit initialization for objects of automatic storage duration, care should often be taken to ensure that the address to which ptr points is valid; this is why it is sometimes suggested that a pointer be explicitly initialized to the null pointer value, which is traditionally specified in C with the standardized macro NULL:
  11. Prior to the C99 standard, variable-sized arrays were a common example of this . ( See the article on malloc for an example of dynamically allocated arrays . ) Unlike automatic allocation, which can fail at run time with uncontrolled consequences, the dynamic allocation functions return an indication ( in the form of a null pointer value ) when the required storage cannot be allocated . ( Static allocation that is too large is usually detected by the loader, before the program can even begin execution .)

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