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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. class b; 
  5.  
  6. class a {
  7. private:
  8.     int num1 = 10, num2 = 20;
  9.  
  10. public:
  11.     friend class b; 
  12.     void print(b &obj); 
  13. };
  14.  
  15. class b {
  16. private:
  17.     int c = 9;
  18.  
  19. public:
  20.     friend class a;
  21.     void print(a &obj) {
  22.         cout << obj.num1 << " " << obj.num2 << endl;
  23.     }
  24. };
  25.  
  26.  
  27. void a::print(b &obj) {
  28.     cout << obj.c << endl;
  29. }
  30.  
  31. int main() {
  32.     a obj1;
  33.     b obj2;
  34.     obj1.print(obj2); 
  35.     obj2.print(obj1); 
  36.     return 0;
  37. }
  38.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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9
10 20
https://ideone.com/RiIRYF
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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