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  1. #define ARR_LEN_BY_MACRO(x) sizeof(x)/sizeof(*x)
  2. #include <iostream>
  3. #include <string>
  4.  
  5. int ARR_LEN_BY_FUNC(int *x)
  6.     {
  7.      return sizeof(x)/sizeof(*x);
  8.     }
  9.  
  10.  
  11. int main()
  12. {
  13.     int arr[5]={1,2,3,4,5};
  14.     int m,f;
  15.     m=ARR_LEN_BY_MACRO(arr);
  16. f=ARR_LEN_BY_FUNC(arr);
  17.  
  18.   std::cout << m-f;
  19. }
  20.  
Success #stdin #stdout 0s 3412KB
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https://ideone.com/dzBiNC
language:
C++14 (clang 8.0)
created:
9 years ago
visibility:
public

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