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  1. #include <iostream>
  2. using std::cout;
  3. using std::endl;
  4.  
  5. template <typename T, size_t N>
  6. size_t len(T (*)[N]) {
  7. 	return N;
  8. }
  9.  
  10. int main() {
  11. 	int foo[10];
  12. 	cout << len(&foo) << endl;
  13.  
  14. 	const size_t n = 42;
  15. 	double baz[n];
  16. 	cout << len(&baz) << endl;
  17.  
  18. 	cout << len(&"hello") << endl;
  19. }
Success #stdin #stdout 0s 3468KB
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stdin
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Standard input is empty
stdout
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10
42
6
https://ideone.com/mBnyxl
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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