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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class t{
  5.     int var;
  6. public:
  7.     t(int val):var(val){};
  8.     static friend int inc(t *pt){
  9.         return ++pt->var;
  10.     }
  11. };
  12.  
  13. int main() {
  14.  
  15. 	t a(42);
  16.  
  17.  
  18. 	return 0;
  19. }
Compilation error #stdin compilation error #stdout 0s 3336KB
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stdin
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Standard input is empty
compilation info 
prog.cpp:8:32: error: storage class specifiers invalid in friend function declarations
     static friend int inc(t *pt){
                                ^
stdout
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Standard output is empty
https://ideone.com/svngCK
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
secret

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