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  1. #include <iostream>
  2.  
  3. extern int x[];
  4.  
  5. int main() {
  6. 	std::cout << sizeof(x) << "\n";
  7. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:6:23: error: invalid application of ‘sizeof’ to incomplete type ‘int []’
  std::cout << sizeof(x) << "\n";
                       ^
stdout
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Standard output is empty
https://ideone.com/5wSwhF
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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