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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int sum(int n)
  5. {
  6. 	if ( n <= 1 ) return n;
  7. 	else
  8. 	{
  9. 		return n + sum(n-1);
  10. 	}
  11. }
  12.  
  13.  
  14.  
  15. int main()
  16. {
  17. 	int n;
  18. 	cin>>n;
  19. 	cout<<sum(n);
  20. }
Success #stdin #stdout 0s 5344KB
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https://ideone.com/FHIQaJ
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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