sizeof() operator in if-statement

by
  1. sizeof is not a function, it’s an operator. The parentheses are not part of the operator’s name.
  2. It’s failing because the value generated has the unsigned type size_t, which causes “the usual arithmetic conversions” in which -1 is converted to unsigned, in which case it’s a very large number.

Basically you’re comparing 4 > 0xffffffffu, or something close to that at least. See this question for details.

More Related Contents:

  1. Why isn’t the size of an array parameter the same as within main?
  2. C sizeof a passed array [duplicate]
  3. Are there any platforms where pointers to different types have different sizes?
  4. Why does sizeof(x++) not increment x?
  5. What does the ‘array name’ mean in case of array of char pointers?
  6. newbie questions about malloc and sizeof
  7. Why is sizeof considered an operator?
  8. Using sizeof with a dynamically allocated array
  9. Why is this happening with the sizeof operator when comparing with a negative number? [duplicate]
  10. sizeof with a type or variable
  11. size of character array and size of character pointer
  12. In C, why is sizeof(char) 1, when ‘a’ is an int?
  13. What does sizeof without () do? [duplicate]
  14. How can I print the result of sizeof() at compile time in C?
  15. How sizeof(array) works at runtime?
  16. How to get the string size in bytes?
  17. C – SizeOf Pointers
  18. C pointers and arrays/ ‘sizeof’ operator [duplicate]
  19. Why (and when) do I need to use parentheses after sizeof?
  20. Sizeof vs Strlen
  21. Why do I get a warning every time I use malloc?
  22. sizeof single struct member in C
  23. Implementation of sizeof operator
  24. What’s sizeof(size_t) on 32-bit vs the various 64-bit data models?
  25. ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=] [duplicate]
  26. Reliably determine the number of elements in an array
  27. What decides the sizeof an integer?
  28. C -> sizeof string is always 8
  29. Size of pid_t, uid_t, gid_t on Linux
  30. Find size of array without using sizeof

Leave a Comment