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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class A
  5. {   
  6. void f();
  7. };
  8.  
  9. class B
  10. {
  11. friend void A::f();
  12. };
  13.  
  14. int main()
  15. {
  16. return 0;
  17. }
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:6:6: error: ‘void A::f()’ is private
 void f();
      ^
prog.cpp:11:18: error: within this context
 friend void A::f();
                  ^
stdout
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Standard output is empty
https://ideone.com/uHTO0d
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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