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  1. #include <iostream>
  2.  
  3.  
  4. void do_post_increment()
  5. {
  6. 	const unsigned legal_age = 21 ;
  7. 	unsigned age = 0 ;
  8.  
  9. 	while( age++ < legal_age )
  10. 	{
  11. 		std::cout << "Your age is " << age << ".\n" ;
  12. 		std::cout << "You can't have a beer until you are " << legal_age << "!\n\n";
  13. 	}
  14. }
  15.  
  16. void do_pre_increment()
  17. {
  18. 	const unsigned legal_age = 21 ;
  19. 	unsigned age = 0 ;
  20.  
  21. 	while( ++age < legal_age )
  22. 	{
  23. 		std::cout << "Your age is " << age << ".\n" ;
  24. 		std::cout << "You can't have a beer until you are " << legal_age << "!\n\n";
  25. 	}
  26. }
  27.  
  28. int main()
  29. {
  30. 	do_post_increment() ;
  31. 	std::cout << '\n' ;
  32. 	do_pre_increment() ;
  33. }
  34.  
  35.  
  36.  
Success #stdin #stdout 0s 3340KB
comments (?)
stdin
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Standard input is empty
stdout
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Your age is 1.
You can't have a beer until you are 21!

Your age is 2.
You can't have a beer until you are 21!

Your age is 3.
You can't have a beer until you are 21!

Your age is 4.
You can't have a beer until you are 21!

Your age is 5.
You can't have a beer until you are 21!

Your age is 6.
You can't have a beer until you are 21!

Your age is 7.
You can't have a beer until you are 21!

Your age is 8.
You can't have a beer until you are 21!

Your age is 9.
You can't have a beer until you are 21!

Your age is 10.
You can't have a beer until you are 21!

Your age is 11.
You can't have a beer until you are 21!

Your age is 12.
You can't have a beer until you are 21!

Your age is 13.
You can't have a beer until you are 21!

Your age is 14.
You can't have a beer until you are 21!

Your age is 15.
You can't have a beer until you are 21!

Your age is 16.
You can't have a beer until you are 21!

Your age is 17.
You can't have a beer until you are 21!

Your age is 18.
You can't have a beer until you are 21!

Your age is 19.
You can't have a beer until you are 21!

Your age is 20.
You can't have a beer until you are 21!

Your age is 21.
You can't have a beer until you are 21!


Your age is 1.
You can't have a beer until you are 21!

Your age is 2.
You can't have a beer until you are 21!

Your age is 3.
You can't have a beer until you are 21!

Your age is 4.
You can't have a beer until you are 21!

Your age is 5.
You can't have a beer until you are 21!

Your age is 6.
You can't have a beer until you are 21!

Your age is 7.
You can't have a beer until you are 21!

Your age is 8.
You can't have a beer until you are 21!

Your age is 9.
You can't have a beer until you are 21!

Your age is 10.
You can't have a beer until you are 21!

Your age is 11.
You can't have a beer until you are 21!

Your age is 12.
You can't have a beer until you are 21!

Your age is 13.
You can't have a beer until you are 21!

Your age is 14.
You can't have a beer until you are 21!

Your age is 15.
You can't have a beer until you are 21!

Your age is 16.
You can't have a beer until you are 21!

Your age is 17.
You can't have a beer until you are 21!

Your age is 18.
You can't have a beer until you are 21!

Your age is 19.
You can't have a beer until you are 21!

Your age is 20.
You can't have a beer until you are 21!
https://ideone.com/hvg1m3
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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