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  1. #include <cstdio>
  2.  
  3. int main()
  4. {
  5.     void f(); // Forward declare function named "f" returning void in the
  6.               // global namespace.
  7.     f();
  8. }
  9.  
  10. /*    
  11. void g()
  12. {
  13.     f(); // ERROR!
  14. }
  15. */
  16.  
  17. void f()
  18. {
  19.     std::puts("hello!");
  20. }
Success #stdin #stdout 0s 2852KB
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stdin
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Standard input is empty
stdout
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hello!
https://ideone.com/kJHGoF
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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